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Surge Protection, Filtration

A surge protector is an appliance designed to protect electrical devices from power surges and voltage spikes. Surge protectors attempt to regulate the voltage supplied to an electric device by either blocking or shorting to ground voltage above a safe threshold. more...

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Surge protectors can be built with one or more of the following electronic components:

  • A fuse burns out or a circuit breaker trips when excessive power is being consumed and fed to a device. These can protect both from surges caused by the device itself and from external surges that last long enough.
  • An iron poor transformer can transmit AC power similar to a normal iron core transformer (although less efficiently), but will be unable to transmit sudden surges that saturate the small iron core.
  • A MOV is a small device that will short out when presented with a sufficiently high voltage, hopefully passing the surge to ground through the MOV rather than through the protected device. Unfortunately, these devices tend to self destruct (and are therefore one-shot devices) with sufficiently strong surges. Many cheap surge protectors only have MOV's, and probably will not survive even a single lightning strike.
  • A zener diode is a small diode designed to protect against normal spikes in a circuit, especially motor controller circuits. These are sometimes paired as a transient voltage suppression diode.
  • A gas discharge tube is used much like a MOV, except that it relies on a trapped gas to become ionized to pass the voltage. This has the advantage of being able to pass much more power without self destructing, but with the disadvantage of reacting to the high voltage more slowly.
  • An Uninterruptible power supply (in addition to other surge protection devices listed above) typically passes external power past the unit's battery, which will absorb spikes much like a capacitor in parallel acts as a low pass filter. (This also keeps the battery charged, and in the event of a failure, the battery can continue to supply power without any interruption otherwise needed to switch it in.) Typically these are the best ones, but are also more expensive.

Read more at Wikipedia.org


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Extension OutletExtension Outlet $9.99 Eaton Surgetrap Sult12Tc Surge Protector with Coax/Network/Phone ProtectionEaton Surgetrap Sult12Tc Surge Protector with Coax/Network/Phone Protection $39.99
Power Strip with Multi Outlet Usb C Charger 5/10/15 Ft Extension Cord Flat PlugPower Strip with Multi Outlet Usb C Charger 5/10/15 Ft Extension Cord Flat Plug $21.99 to Tripp Lite Isobar Surge Protector Medical Metal 6 Outlet 15' CordTripp Lite Isobar Surge Protector Medical Metal 6 Outlet 15' Cord $157.55
Eaton Chspcable Surge Protection For Coax Cables Modem ProtectionEaton Chspcable Surge Protection For Coax Cables Modem Protection $16.00 Eaton Chsp22 Pack Whole House Surge Protector Chspt2Ultra & Chspcable New In BoxEaton Chsp22 Pack Whole House Surge Protector Chspt2Ultra & Chspcable New In Box $125.00
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Power Strip with Surge Protection Usb C 6 Outlet Thin Plug 5 Ft Cord for DesktopPower Strip with Surge Protection Usb C 6 Outlet Thin Plug 5 Ft Cord for Desktop $19.59 12-Outlet Surge Protect 6 ft. Braided Cord Usb Coax, Black12-Outlet Surge Protect 6 ft. Braided Cord Usb Coax, Black $23.00
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Furman Ac Power Conditioner Model Ac-215AFurman Ac Power Conditioner Model Ac-215A $70.00 Panamax M4300-Pm - Power Management Surge ProtectorPanamax M4300-Pm - Power Management Surge Protector $45.00
Ge Tranquell Tle120Y025Wm Surge Protective DeviceGe Tranquell Tle120Y025Wm Surge Protective Device $125.00 Multi-functional Power Strip Surge Protector, 8 Outlets 4Ft Long Extension CordMulti-functional Power Strip Surge Protector, 8 Outlets 4Ft Long Extension Cord $12.99
Ge Pro Extension Cord with Surge Protection 15 ft 3 Outlet Braided Cord BlackGe Pro Extension Cord with Surge Protection 15 ft 3 Outlet Braided Cord Black $22.20 3 Options Power Strip Surge Protector 8 Ac Outlets 3 Usb Ports Type C Port Cable3 Options Power Strip Surge Protector 8 Ac Outlets 3 Usb Ports Type C Port Cable $12.55 to
Crst 6-outlet Heavy Duty Power Strip Surge Protector with Cord Management 15FeetCrst 6-outlet Heavy Duty Power Strip Surge Protector with Cord Management 15Feet $22.59 Panamax M5300-Pm 11-Outlet Home Theater Power Conditioner Used Light ScratchesPanamax M5300-Pm 11-Outlet Home Theater Power Conditioner Used Light Scratches $189.99
CyberPower 12-Outlet Surge Protect 6 ft Braided Cord Usb Coax Black Ht1206Uc2Rc1CyberPower 12-Outlet Surge Protect 6 ft Braided Cord Usb Coax Black Ht1206Uc2Rc1 $21.99 New ListingTripp-Lite Protect It! 6 ft Cord 990 Joules Surge Suppressor 6 Outlets Tlp608New ListingTripp-Lite Protect It! 6 ft Cord 990 Joules Surge Suppressor 6 Outlets Tlp608 $15.00
Eaton Complete Home Surge Trap Cable Protector 20,000 Amp - New In BoxEaton Complete Home Surge Trap Cable Protector 20,000 Amp - New In Box $21.99 New ListingMonster Power Strip Surge Protector with Usb Ports - Heavy Duty ProtectionNew ListingMonster Power Strip Surge Protector with Usb Ports - Heavy Duty Protection $29.99
Sqd - Hom250Pspd 50kA Rated Whole Home Surge Protector. No Wiring RequiredSqd - Hom250Pspd 50kA Rated Whole Home Surge Protector. No Wiring Required $80.00 6-Pack Prime Pb503105 Rotating 6-Outlets 120V/15A/60Hz/1800W/2160J Surge Protect6-Pack Prime Pb503105 Rotating 6-Outlets 120V/15A/60Hz/1800W/2160J Surge Protect $99.00
LittelFuse Lsp10480S Type 4 Outdoor Cable Mounted Surge ProtectionLittelFuse Lsp10480S Type 4 Outdoor Cable Mounted Surge Protection $16.99 Belkin 12-Outlet Surge ProtectorBelkin 12-Outlet Surge Protector $14.00
Mobotix Mx-Overvoltage-Protection -Box-Rj45-Lsa with Surge ProtectionMobotix Mx-Overvoltage-Protection -Box-Rj45-Lsa with Surge Protection $40.00 Monster Home Theater Jp 800 Surge Protector, 8 Outlets, 2160 joules ProtectionMonster Home Theater Jp 800 Surge Protector, 8 Outlets, 2160 joules Protection $34.99
Eaton Chspcable Indoor Surge Protection For Coax CablesEaton Chspcable Indoor Surge Protection For Coax Cables $45.00 Panamax M4300-Pm PowerManagement 9-Outlet SurgeProtector Noise SupressorPanamax M4300-Pm PowerManagement 9-Outlet SurgeProtector Noise Supressor $43.00
Furman Ac-215A 2-Outlet 10 Amp Power Conditioner Surge Protector Noise FilterFurman Ac-215A 2-Outlet 10 Amp Power Conditioner Surge Protector Noise Filter $124.95 Eaton Surge Protection For Coax Cables Electronics Modem Protection ChspcableEaton Surge Protection For Coax Cables Electronics Modem Protection Chspcable $24.99
Heavy Duty 10 Outlet Extender 3150J Surge Protector Wall Adapter Plug 15Ft CableHeavy Duty 10 Outlet Extender 3150J Surge Protector Wall Adapter Plug 15Ft Cable $29.99 Mersen Sp07U550 Surge Protection Devices (Spd) AccessoriesMersen Sp07U550 Surge Protection Devices (Spd) Accessories $74.54
Monster FlatScreen PowerProtect Avfl 200 Surge Protector 2 Outlets - 1100 JoulesMonster FlatScreen PowerProtect Avfl 200 Surge Protector 2 Outlets - 1100 Joules $8.99 Eaton Cutler-Hammer Whole House Surge Trap (Chspt2Micro) - NewEaton Cutler-Hammer Whole House Surge Trap (Chspt2Micro) - New $40.00
Square D - Sdsa1175 Surge Protection Device, 1 Phase, 120/240VSquare D - Sdsa1175 Surge Protection Device, 1 Phase, 120/240V $69.99 Panamax M8-Av-Pro Home Theater Power Management (Black) U.S. Authorized DealerPanamax M8-Av-Pro Home Theater Power Management (Black) U.S. Authorized Dealer $119.00
New Square D Tvs12Rmu Accessories Surge Protective Device SurgelogicNew Square D Tvs12Rmu Accessories Surge Protective Device Surgelogic $19.15 Cable Tv In-Line Coaxial Surge ProtectorCable Tv In-Line Coaxial Surge Protector $10.85
Upgrade Surge Protection Jumper Cable Clamps for Milwaukee M18 18V BatteryUpgrade Surge Protection Jumper Cable Clamps for Milwaukee M18 18V Battery $46.00 Eaton Chspcable Home Surge Protection.Eaton Chspcable Home Surge Protection. $89.00
Surge Protector Power Strip with Usb,Ethernet,Cable,Teleph one,Coaxial ProtectionSurge Protector Power Strip with Usb,Ethernet,Cable,Teleph one,Coaxial Protection $32.19 Cable Tv In Line Coaxial Surge Protector Protection Electronics lightning surgeCable Tv In Line Coaxial Surge Protector Protection Electronics lightning surge $10.95
New ListingFurman Ac-215A 2-Outlet 10 Amp Power Conditioner Surge Protector Noise FilterNew ListingFurman Ac-215A 2-Outlet 10 Amp Power Conditioner Surge Protector Noise Filter $55.00 Square D Surge protection device 120kA, 480Y/277 Vac, 3 phase, 4 wireSquare D Surge protection device 120kA, 480Y/277 Vac, 3 phase, 4 wire $799.00
Eaton Nnb Chspcable Surge Protection Devices (Spds) Coax Cable Protection 145V EEaton Nnb Chspcable Surge Protection Devices (Spds) Coax Cable Protection 145V E $65.23 Eaton Db9 Surge Protection Devices (Spd) AccessoriesEaton Db9 Surge Protection Devices (Spd) Accessories $20.78
Ditek Dtk-Mrjpoe 10Gb Ethernet Surge Protection - BlackDitek Dtk-Mrjpoe 10Gb Ethernet Surge Protection - Black $30.00 Ditek Single Channel Ip Surge Protection Cat5e, Cat6, Cat6A Lines Dtk-MrjethsDitek Single Channel Ip Surge Protection Cat5e, Cat6, Cat6A Lines Dtk-Mrjeths $41.00
CyberPower Cps1215Rms Rackmount Surge Protector, 120V/15A, 12 Outlets, 15' CableCyberPower Cps1215Rms Rackmount Surge Protector, 120V/15A, 12 Outlets, 15' Cable $52.00 Panamax Mr4300 Home Theater Pm Line Conditioner and Surge Protector *Read*Panamax Mr4300 Home Theater Pm Line Conditioner and Surge Protector *Read* $29.95
New Tripp Lite 8-Outlet Surge Protector Black Tlp810Net 3240 JoulesNew Tripp Lite 8-Outlet Surge Protector Black Tlp810Net 3240 Joules $29.99 Eaton Nsb Chspfmkit Surge Protection Devices (Spd) Accessories EaEaton Nsb Chspfmkit Surge Protection Devices (Spd) Accessories Ea $42.29
Belkin Be112234-10 Surge Protector Surge Suppressor-NewBelkin Be112234-10 Surge Protector Surge Suppressor-New $24.97
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Prices current as of last update, 05/11/25 10:20pm.

See also...
Monster Power Centers, Surge Protection, Filtration, Accessories & Cables
Other Surge Protection, Surge Protection, Filtration, Accessories & Cables
Power Strips, Surge Protection, Filtration, Accessories & Cables

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