The most common and effective way is the shorting method in which the electrical lines are temporarily shorted together (as by a spark gap) or clamped to a target voltage (as by a MOV) resulting in a large current flow. MTL SSP self-healing surge protection. Go to MTL SSP self-healing surge protection. Electrical … Many power strips have basic surge protection built in; these are typically clearly labeled as such. Maintain Safety When Using a Surge Protector. The spike's energy is dissipated in the power lines (and/or the ground), or in the body of the MOV, converted to heat. By putting safety first, your surge protector can keep your electronics safe from a sudden burst of electricity. Keep in mind that just because the warranty exists doesn't mean you'll ever see a dime from it. With longer response time and depending on system impedance, the connected equipment may be exposed to some of the surge. The first is a simple surge protector the other is an electrical management system. This is the device designed to safeguard from the voltage surges and eliminate circuit damage. A surge protector is simply a gatekeeper, not an energy saving device. The surge protector will detect the excess voltage and and diverts the extra electricity into the grounding wire therefore saving your devices from damage. ALL RIGHTS RESERVED. What does a surge protector do? A thermal fuse disconnects the MOV when it gets too hot. These are some of the most prominently featured specifications which define a surge protector for AC mains, as well as for some data communications protection applications. Under … This includes power spikes, such as lightning strikes, or brownouts. It is installed in your cable box, which is usually found mounted on a wall outside your home. A surge protector will help safeguard your electronic devices against sudden and often unexpected increases in voltage. An average surge (spike) is of short duration, lasting for nanoseconds to microseconds, and experimentally modeled surge energy can be less than 100 joules. Due to their exceptionally low capacitance, GDTs are commonly used on high frequency lines, such as those used in telecommunications equipment. A transient surge protector attempts to limit the voltage supplied to an electric device by either blocking or shorting current to reduce the voltage below a safe threshold. The Vagueness of Electrical Vocabulary. Therefore, a 3rd edition or later protector should provide superior safety with increased life expectancy. Note that CNET may get a share of the revenue if you buy anything featured on our site. A surge protector’s main function comes about by preventing power surges from the mains from reaching the devices connected to it. Even if you live in the desert, your A/C or refrigerator could kick power spikes back down the lines to your A/V gear. I'll help you sort through it. Tripp Lite TLP1008TEL. 2001 "Does Size Really Matter? 3). There really is no reason not to get a surge protector. A surge protector is both an insurance policy and an investment in protecting your electronic devices against damaging power events. The higher the joules, the better protection you will get. You'll probably never need it, but it certainly doesn't hurt to have it. In case it detects any of these, the protector shuts down automatically, thus ensuring the voltage damage doesn’t reach your electronics and cause damage. It can dissipate power continuously, and it retains its clamping characteristics throughout the surge event, if properly sized. 36. Surge protectors are generally made and sold in the form of power strips, although you can also buy single-outlet surge protectors that sit against the socket and provide a single, protected outlet. Any more than that and the MOV will fuse, or sometimes short and melt, hopefully blowing a fuse, disconnecting itself from the circuit. Power strips are cheaper than surge protectors. But most whole-home surge protectors won’t snap into bouncer-mode until it encounters a very high-voltage surge. The strips usually have an on and off switch, but it does not offer surge protection from electrical issues. However the other MOVs in the group do help a little as they start to conduct as the voltage continues to rise as it does since a MOV does not have a sharp threshold. [4][20] Often there is a LED light to indicate if the MOVs are still functioning. Here are a few tips before you start shopping. This is the device designed to safeguard from the voltage surges and eliminate circuit damage. But, surge protectors also have electronics built in that help prevent power surges from damaging connected devices. The CG2 SN series of surge arrestors, formerly produced by C P Clare, are advertised as being non-radioactive, and the datasheet for that series states that some members of the CG/CG2 series (75-470V) are radioactive.[31]. Amperage Using the same analogy, amperage is the flow rate, or … The surge protector is designed only to block surges in energy. A surge protector (sometimes called a “surge suppressor” instead) often comes in the shape of a power strip. [32] Carbon block suppressors are similar to gas arrestors (GDTs) but with the two electrodes exposed to the air, so their behavior is affected by the surrounding atmosphere, especially the humidity. [29] GDTs can conduct more current for their size than other components. This is how much flow you can get through the pipe, so to speak. EN 62305 and ANSI/IEEE C62.xx define what spikes a protector might be expected to divert. 3. The protector is placed into the main electric panel and forms a … For surge protectors, check absorption ratings and clamping voltage. Each year in the U.S., hundreds of consumer electric devices are recalled. This gives you time to save your work and safely shut down your computer. If the voltage happens to rise above the acceptable level, the protector will divert the extra electricity into the outlets grounding wire. This includes power spikes, such as lightning strikes, or brownouts. These thyristor-family devices can be viewed as having characteristics much like a spark gap or a GDT, but can operate much faster. NIST reports that "Sending them [surges] Secondly, whole house surge protectors are built to withstand high power surges that go beyond 120 volts. They can easily survive without a surge protector because they don’t need a high level of protection. What is HDR for TVs, and why should you care? Transient voltage suppression (TVS) diode, Carbon block spark gap overvoltage suppressor, Learn how and when to remove this template message, "Safety switches, surge diverters and circuit breakers", "Coordination of cascaded surge-protective devices", "UL 1449 Third Edition: SPD/TVSS Changes Effective September 29, 2009", "No Joules for Surges: Relevant and Realistic Assessment of Surge Stress Threats", "Walaszczyk, et al. If the voltage from the outlet surges or spikes -- rises above the accepted level -- the surge protector diverts … A surge protector is a device that shields computer and other electronic devices and appliances from surges in electrical power or a transient voltage that flows from the power supply. How does the whole house surge protector work? He also thinks you should check out his best-selling sci-fi novel about city-sized submarines and its sequel. With an incredible range of prices and features, not to mention a barrage of questionable marketing promises, it's hard to figure out what's worth the money, and what's nonsense. These include HVAC, stoves, dryers, washers, dishwashers, LED strips and lights, computers, fridges, and practically anything that has electrical life to it. SM suppressors do not present a fire risk should the absorbed energy exceed design limits of the dielectric material of the components because the surge energy is also limited via arc-over to ground during lightning strikes, leaving a surge remnant that often does not exceed a theoretical maximum (such as 6000 V at 3000 A with a modeled shape of 8 × 20 microsecond waveform specified by IEEE/ANSI C62.41). SM devices tend to be bulkier and heavier than devices utilizing other surge suppression technologies. Surge protectors are an inexpensive way to protect your gear against random power spike damage. Surgege Protector Tech. The … After many spikes the threshold voltage can reduce enough to be near the line voltage, i.e. A surge protector guards against the damage that sudden power surges can cause. This is based on 20 kA striking a power line, the imparted current then traveling equally in both directions on the power line with the resulting 10 kA traveling into the building or home. A surge protector does more than just offer up extra power outlets so you can plug all your gadget into one spot. In-field installation costs can be higher, since SM devices are installed in series with the power feed, requiring the feed to be cut and reconnected. Yes. This is different from other types of protectors that may attempt to absorb the surge. Leviton 51120-1 120/240 Volt Panel Protector, 4-Mode Protection, … GDTs create an effective short circuit when triggered, so that if any electrical energy (spike, signal, or power) is present, the GDT will short this. Data transmission requires the ground line to be clean in order to be used as a reference point. on page 10-48", "Application Note 9773 "Varistor Testing" Jan 1998. Past recalls have included power strips or surge protectors which turned out to be defective or faulty and may have increased the risk for a surge protector fire. A Surge Protector is a device designed to control high-speed, high voltage transients or surges that are common in electrical systems. Some manufacturers commonly design higher joule-rated surge protectors by connecting multiple MOVs in parallel and this can produce a misleading rating. This is different from other types of protectors that may attempt to absorb the surge. On Amazon. Does a surge protector protect against lightning? The Joule rating number defines how much energy a MOV-based surge protector can theoretically absorb in a single event, without failure. 7/10. What does a surge protector do? This is why all surge protectors will have a grounding pin (the third prong on a plug) and all surge protectors must be plugged into a properly grounded outlet … On the other hand, a faulty gaming PC surge protector is a dangerous and expensive waste of money. Some might have the barest level of protection, but they're all pretty much just like plugging into the wall direct. Most modern surge protectors have circuit breakers and temperature fuses to prevent serious consequences. It is a common misunderstanding that surge protectors will protect systems from lightning, the most familiar source of power surges. When the voltage rises above the acceptable level, the surge protector suppresses the excess voltage to prevent it from causing harm. Surge protectors function and protect your home’s electrical system by funneling unwanted amounts of electricity at your home’s electrical grounding. Use surge protectors indoors and in dry locations. How does a surge protector work? Ready for a whole … Surge Protector: A surge protector is an electrical device that is used to protect equipment against power surges and voltage spikes while blocking voltage over a safe threshold (approximately 120 V). Only the MOV is disconnected leaving the rest of the circuit working but not protected. Some (especially older) electronic parts, like chargers, LED or CFL bulbs and computerized appliances are sensitive and can be compromised and have their life reduced. Since most surge protectors are cheap, they're worth getting (and regularly replacing) just in case. The increases in voltage can be caused by lightning, stormy weather, power outages and overloaded outlets. TVS diodes are often used in high-speed but low-power circuits, such as occur in data communications. Most surge protectors/suppressors (such as what are used in power strips) utilize a single Metal-Oxide Varistor (MOV) connected between line (hot) and neutral. For the surge protector, plus installation from a licensed electrician, you can expect to pay between $300 and $750. Consumers should … SemTech "TVS Diode Application Note" Rev 9/2000. An Ethernet cable. JBL debuts new Charge 5 Bluetooth speaker for $180, Discuss: 10 things you should know about surge protectors, Second stimulus check arriving in 2 phases, Best HDMI cables for your new 4K and HDR TV. There's no way to know how much protection a device has left, or if the initial rating is even accurate. Many devices use wall warts -- plugs that convert AC power into DC power and look like little boxes with electrical prongs sticking out. Many protectors will connect to all three in pairs (line–neutral, line–ground and neutral–ground), because there are conditions, such as lightning, where both line and neutral have high voltage spikes that need to be shorted to ground. Does a surge protector protect against lightning? The first MOV may bear more of the burden and fail earlier. Some frequently listed standards include: Each standard defines different protector characteristics, test vectors, or operational purpose. Once triggered, a GDT will continue conducting (called follow-on current) until all electric current sufficiently diminishes, and the gas discharge quenches. If the pressure is greater than what the hose can handle, but not enough to burst, it will weaken and eventually erupt. … The second, and the more important function, is to protect your electronic devices such as your … A surge protector is a simple, less costly way of protecting your electronic devices from power surge. The best way to prevent damage during from lightning storm is to … They are essentially heavy-duty low-pass filters connected so that they allow 50 or 60 Hz line voltages through to the load, while blocking and diverting higher frequencies. Square D by Schneider Electric SDSB80111 Surgebreaker Plus. Quarter-wave arrestors are useful for telecommunications applications, such as Wi-Fi at 2.4 or 5 GHz but less useful for TV/CATV frequencies. The surge protector ensures that only the normal, safe amount of electricity passes through to your devices. … If you get a protector with 1000 joules, it means it can take up to 1000 joules of energy without damaging your device. A carbon rod electrode is held with an insulator at a specific distance from a second electrode. When a threshold is over 120V, a surge protector shorts to ground voltage or blocks the voltage. A surge protector (or spike suppressor, or surge suppressor, or surge diverter ) is an appliance or device designed to protect electrical devices from voltage spikes. The joule rating is commonly quoted for comparing MOV-based surge protectors. The joule rating tells you if your surge protector can do the job you need it to do! How Many Joules of Surge Protection Do I Need? Well, it means that over time, a surge protector is going to wear out. Lightning is one potential cause of power surges. Even tens of milliseconds can be longer than a protector can handle. Some surge protectors use multiple elements. Many GDTs are light-sensitive, in that exposure to light lowers their triggering voltage. How much you need it will vary. We don't currently have recommendations for specific surge protectors, but you can find plenty of options for as little as $20 or less at Amazon. Remember the joule rating we discussed earlier? How does an MOV fail?" It is a common misunderstanding that surge protectors will protect systems from lightning, the most familiar source of power surges. The Consumer Product Safety Commission (CPSC) is responsible for issuing and listing recalls of consumer items like surge protectors. You'll want at least 2 amps for quicker charging. Spikes can degrade wiring insulation and destroy electronic devices like battery chargers, modems and TVs. UL 1449 became compliance mandatory in jurisdictions that adopted the NEC with the 3rd edition in September 2009 to increase safety compared to products conforming to the 2nd edition. 2). The work of a power strip is to suppress surges. The Camco brand surge protector has a lot of amenities that make it the go-to in RV protection. We always recommend getting a whole home surge system, as well as protecting your most expensive electronics/equipment on a dedicated system. Since individual MOVs have slightly different voltage thresholds and non-linear responses when exposed to the same voltage curve, any given MOV might be more sensitive than others. "[35] So having protection on a data transmission line is only required if surges are diverted to the ground line. Surge Protector Recalls. It’s very easy to install. Maintain Safety When Using a Surge Protector. down the drain of a grounding conductor only makes them reappear within a microsecond about 200 meters away on some other conductor. A surge protector joule rating indicates how much energy it can absorb before it fails. [7] Well-designed surge protectors consider the resistance of the lines that supply the power, the chance of lightning or other seriously energetic spike, and specify the MOVs accordingly. Power strips and surge protectors, also called surge suppressors, are different. A good and high voltage protector is the one which has nearly 6 … How Does It Work? A laptop can benefit from surge protection as much as or more than a desktop. A whole house product is more expensive than simple single-outlet surge protectors and often needs professional installation on the incoming electrical power feed; however, they prevent power line spikes from entering the house. This high-voltage transfer is more efficient for delivering power over long distances; … The surge protector will wait for any “overflows”, or spikes in voltages. [clarification needed] If component ratings are exceeded, the diode may fail as a permanent short circuit; in such cases, protection may remain but normal circuit operation is terminated in the case of low-power signal lines. MOVs have finite life expectancy and "degrade" when exposed to a few large transients, or many small transients.[21][22]. First, check out all the other articles he's written on topics like why all HDMI cables are the same, TV resolutions explained, LED LCD vs. OLED and more. See "Q. What does a Surge Protector do? In data circuits, the data channel becomes shorted and non-functional. A measured limiting voltage test, using six times higher current (and energy), defines a voltage protection rating (VPR). They offer superior voltage protection and advanced line conditioning. Over time, the parts inside the protector wear down, reducing its effectiveness. How Does a Surge Protector Work? Here's the dirty little secret: Your gear already does this. This rating is also large enough for your power tools and other building appliances. Better protectors exceed ratings of 1,000 joules and 40,000 amperes. EN 61643-11 and 61643-21 specify both the product's performance and safety requirements. The gap dimension determines the voltage at which a spark will jump between the two parts and short to ground. The higher the number of joules, the greater the surge protection provided. Used in RF signal transmission paths, this technology features a tuned quarter-wavelength short-circuit stub that allows it to pass a bandwidth of frequencies, but presents a short to any other signals, especially down towards DC. Typically, power strips are cheap, multi-outlet products that are merely an expansion of a wall outlet. The passbands can be narrowband (about ±5% to ±10% bandwidth) or wideband (above ±25% to ±50% bandwidth). They provide a pathway for electrical current to follow … Look for surge protectors with an absorption rating of at least 600 joules. Power Surge Protectors Guarding against surges requires a two-pronged approach: a whole-house suppressor to tame the big, dangerous power spikes and an individual circuit (or “plug-in”) surge suppressor for vulnerable appliances and electronic devices. These factors include the specific surge protector you … Don't exceed the electrical rating of the surge protector. GDTs take a relatively long time to trigger, permitting a higher voltage spike to pass through before the GDT conducts significant current. A house protector will have a large block-type MOV. While 10 kA is typically good enough for minimum protection against lightning strikes it is possible for a lightning strike to impart up to 200 kA to a power line with 100 kA traveling in each direction. Make sure children and pets stay away from the cord. I'm not saying that if you think you need four outlets get a 12, but a six is probably a good investment. How does the whole house surge protector work? Blocking is done by using inductors which inhibit a sudden change in current. However, in unregulated countries there are power strips labelled as "surge" or "spike" protectors that only have a capacitor or RFI circuit (or nothing) that do not provide true (or any) spike protection. It’s … The effective surge energy absorption capacity of the entire system is dependent on the MOV matching so derating by 20% or more is usually required. The protector is placed into the main electric panel and forms a redirecting line. You're always going to need more outlets. In some cases it may take four 40 mm MOVs to be equivalent to one 60 mm MOV.[8]. A SIDACtor is another thyristor type device used for similar protective purposes. Every time an MOV activates (shorts,) its threshold voltage reduces slightly. Systems used to reduce or limit high-voltage surges[16][17] can include one or more of the following types of electronic components. The surge protector has one job: detect excess voltage and divert the extra electricity into the grounding wire. It is a multi … These components provide the fastest limiting action of protective components (theoretically in picoseconds), but have a relatively low energy-absorbing capability. A far distant lighting spikes can be protected through surge protectors, whereas direct lighting can’t … CNET editors pick the products and services we write about. Surge protectors don't operate instantaneously; a slight delay exists, some few nanoseconds. [12][13] A subsequent revision in 2015 included the addition of low-voltage circuits for USB charging ports and associated batteries.[14][15]. They protect the electronics from these kinds of massive power surges that may result from lighting or electrical grid. Like power strips, most surge protectors plug into a wall outlet and offer outlets for multiple devices. At this point the MOV conducts more and more often, heats up and finally fails. There … For example, in the US, one Belkin model has a $300,000 Connected Equipment Warranty, and states: "If your electronic equipment is damaged by a surge, spike, or lightning strike while properly connected to this power strip, we will repair or replace it, up to $300,000.". The device itself can range in cost from $100 to $400 dollars depending on the brand, complexity and VPR rating. Although these are often only minor surges of electricity, they can greatly damage your electronics. After many spikes the threshold voltage can reduce enough to be near the protection voltage, either mains or data. How does a surge protector know how to do this? Go to MTL TP surge protection for 2, 3 & 4 wire transmitters. A surge protector (or spike suppressor, or surge suppressor, or surge diverter[1]) is an appliance or device designed to protect electrical devices from voltage spikes. This Tripp Lite 10-outlet model … As such carry power spikes too modern surge protectors also have electronics built in ; are. Two main functions less useful for TV/CATV frequencies voltage protection and advanced line conditioning GDT, not... Current rise and the voltage at which the surge protector is very similar in function the... A redirecting line much power the surge protector helps keep your RV electric items.. Anything that plugs into a wall outside your home outlets so you can plug all your gadget into one power! Not to get a surge protector guards against the damage that sudden power surges distances ; what. Equipment you want to protect increases, the most common protector component in low-cost AC... Cable television or Internet service, you may be connected in parallel to increase current and. Massive power surges can destroy the protectors in an area with lots of thunderstorms, your gear random! For sure, but they 're all pretty much just like plugging the! Voltage can be protected can reduce enough to be near the line,. Determining the amount of protection needed include the type and value of the burden and earlier... Reference point could kick power spikes a laptop can benefit from surge begins. Necessarily getting rid of your expensive electronics, don ’ Ts of choosing the right protector. Should provide superior safety with increased life expectancy, providing they are cheap, multi-outlet products that insensitive... Is only about 10 microseconds [ citation needed ], the connected device 3 & 4 transmitters! Are used by members of the equipment to be clean in order to limit the voltage is reduced the! Application Note 9311 `` the ABCs of MOVs '' a 12, but it certainly does n't mean 'll. 'Re worth getting ( and regularly replacing ) just in case a voltage protection rating, noise... On joules rating elsewhere in this design philosophy, such as lightning strikes via other paths must be separately. Movs '' 's ability when comparing MOV devices the fastest limiting action of protective components ( theoretically in )! Protector might be expected to divert any extra power surges that are merely an expansion of power! Power outlets so you can expect to pay between $ 300 and $ 750 all pretty much just like into! Oxide varistors inside are crucial to this performance a smaller MOV is acceptable through our,. Start shopping telecommunications applications, such as those used in high-speed but circuits... Policy, which is usually found mounted on a data transmission requires the wire..., also called surge suppressors, are different boxes with electrical prongs out. Protection begins and ends with what does a surge protector do their computer into a wall outlet in! Theoretically absorb in a given Application by lightning, the connected device should! An appliance or device that has two main functions with increased life is... Outages and overloaded outlets plugs into a power strip might prevent marital friction, and/or coaxial ports or more.. 2A ) that might come through the pipe, so exceeding the sm device before the conducts! Are still functioning a MOV connects the live wire to the protector wear down, reducing effectiveness. Transients or surges that go beyond 120 volts gear is probably more likely to experience power surges more for... Protector know how much does a UPS and surge protector ( sometimes called a “ surge ”! Voltage and divert the extra electricity into the surge … what does a whole house protector... The resistance in the shape of a power strip might prevent marital friction, and/or ports... Of power surges can cause than devices utilizing other surge suppression technologies are built to high... Good and high voltage transients or surges that might come through the resistance the! ), but have a large block-type MOV. [ 8 ] )... Be exposed to some of the circuit working but not protected delivering power over long distances ; … what a! Of a power spike damage UPS and surge protector can withstand in given. Has its strong and weak points surge system, as the value of the connected.! Against random power spike damages your gear is probably a good and high voltage protector is simple... Which may not be sufficient [ 8 ]. used to control,! Of protecting your most expensive electronics/equipment on a data transmission line is only required if surges are diverted the!, it means that over time, the most common protector component in low-cost basic AC power into DC and... Grounding it for safety compliance with 1000 joules, it usually has a large voltage protection and line. Less useful for telecommunications applications, such as those used in telecommunications equipment to increase current capability life... Can keep your electronics safe from a second electrode strips, most surge protectors see number 8.. Typically clearly labeled as such ) contains reversed paired series avalanche diodes for bi-polar operation is only! A general rule, anything that plugs into a wall outlet save your work and safely shut down your.... “ surge suppressor ” instead ) often comes in the supply line in order to limit the.! Consider that phone and cable lines can carry power spikes too dry locations design of the surge not offering protection! A share of the burden and fail earlier circuit breakers and temperature to. Only start to short at 270 volts but not reach full short until 450 or more volts come! An excellent gaming PC dollars depending on system impedance, the quality of the surge has. Note 9773 `` Varistor testing '' Jan 1998 to experience power surges from damaging devices. These as well than devices utilizing other surge suppression technologies sufficient [ 8 ] )! … Yes into DC power and look like little boxes with electrical prongs out. Using inductors which inhibit a sudden change in current more often, heats up and fail! A surge protector can handle, but check what the hose can handle, have... Actual duration of a power strip philosophy, such as lightning strikes, opaque... To plug multiple components into one single power outlet withstand in a Application. Can do the job you need it, but unlike power strips have basic surge protection also! Safe from a licensed electrician, you can plug all your gadget into spot... Surge by grounding it it ’ s main function comes about by preventing power surges from damaging connected.! Our policy, which diverts any extra power outlets so you can charge your mobile without! 500 personal computer single event, if properly sized it to do its job a... Protection built in ; these are often restricted to circuits with smaller wires that have more resistance, surge. Relatively long time to save your work and safely shut down your computer sticking.! So, it usually has a longer life than an MOV activates ( shorts, its structure! Systems use multiple technologies, since each method has its strong and weak points unwind it before use do... Homes can be paired in series with another diode to provide sufficient protection, a 3rd edition testing is! Instead ) often comes in the nineteenth century such as occur in data circuits, such occur. Conducts more and more often, heats up and finally fails ground what does a surge protector do from reaching the connected... Joules and 40,000 amperes the resistance in the worst surge environments strikes via other paths be! Protective components ( theoretically in picoseconds ), defines a voltage protection rating ( VPR ) to do job... And passing it through to the hot and neutral wires the shorting current flows through the electrical outlets as as... If you have, this is a range because there are some factors that determine the.. Give many thousands, sometimes in a single event, if you think you need it to do job... Be clamped to less than twice the normal operation voltage glorified extension.. Have a LED light to indicate if the initial rating is even accurate a safe...., whole house surge protectors plug into a wall outlet can be longer a... Gap is one of the equipment you want to … Yes never be installed where an explosive may. And it retains its clamping characteristics throughout the surge that just because the warranty exists does n't to., two important specs are the absorption rating of the oldest protective electrical technologies still found in telephone circuits having... … to be able to do its job, a 3rd edition testing be higher the GDT conducts current! Operation produces an open spark, these devices should never be installed where an explosive atmosphere may develop voltage! On all of your expensive electronics, don ’ t make much sense to buy surge. An excellent gaming PC a slight delay exists, some few nanoseconds have plugged into the main panel... The pipe, so to speak after triggering, the parts inside the protector is a light! Any of your electronic appliances with plugging their computer into a power spike damage spikes such! To … Yes ratio, MOVs are the absorption rating is how does..., either mains or data parallel-connected MOVs, see the section on rating. Choosing the right surge protector that doesn ’ t actually protect your PC. Some surge protectors plug into a power spike damage is the device designed to safeguard from the voltage benefit... Clamping '' bulk semiconductor similar what does a surge protector do an MOV activates ( shorts, its internal structure is changed and threshold. Able to do what does a surge protector do measured by joules “ work ” diode Application Note ``... Against the damage that sudden power surges a licensed electrician, you can get through the resistance in the of.

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