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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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Eaton Nsb Chspfmkit Surge Protection Devices (Spd) Accessories EaEaton Nsb Chspfmkit Surge Protection Devices (Spd) Accessories Ea $42.29 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
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 Mersen Stp240d07 Surge Protection Device, 3 Phase, 240V Ac, 3 Poles, 4 WiresMersen Stp240d07 Surge Protection Device, 3 Phase, 240V Ac, 3 Poles, 4 Wires $243.99
Mersen Sp07U550 Surge Protection Devices (Spd) AccessoriesMersen Sp07U550 Surge Protection Devices (Spd) Accessories $74.54 New ListingPanamax M4300-Pm 9-Outlet Power Line Conditioner Usb & Surge Protector ExcellentNew ListingPanamax M4300-Pm 9-Outlet Power Line Conditioner Usb & Surge Protector Excellent $44.99
Eaton Chspcable Home Surge Protection.Eaton Chspcable Home Surge Protection. $89.00 Ge Tpme277Y06As Tranquell Surge Protective Device 3Ph 277/480V Cut Wire.Ge Tpme277Y06As Tranquell Surge Protective Device 3Ph 277/480V Cut Wire. $89.95
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Ditek Dtk-Mrjpoe 10Gb Ethernet Surge Protection - BlackDitek Dtk-Mrjpoe 10Gb Ethernet Surge Protection - Black $30.00 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
New Square D Tvs12Rmu Accessories Surge Protective Device SurgelogicNew Square D Tvs12Rmu Accessories Surge Protective Device Surgelogic $21.40 Cyber Power 4-Outlet Surge Protection 6' Braided Easy-Coil Cord Usb & CoaxCyber Power 4-Outlet Surge Protection 6' Braided Easy-Coil Cord Usb & Coax $20.00
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 $22.99 CyberPower Cps1215Rms Rackmount Surge Protector, 120V/15A, 12 Outlets, 15' CableCyberPower Cps1215Rms Rackmount Surge Protector, 120V/15A, 12 Outlets, 15' Cable $52.00
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 Cable Tv In Line Coaxial Surge Protector Protection Electronics lightning surgeCable Tv In Line Coaxial Surge Protector Protection Electronics lightning surge $10.95
Eaton Cutler-Hammer Whole House Surge Trap (Chspt2Micro) - NewEaton Cutler-Hammer Whole House Surge Trap (Chspt2Micro) - New $40.00 Eaton Surge Protection For Coax Cables Electronics Bi-Directional Led ChspcableEaton Surge Protection For Coax Cables Electronics Bi-Directional Led Chspcable $45.00
Cable Tv In-Line Coaxial Surge ProtectorCable Tv In-Line Coaxial Surge Protector $10.85 Ge Tranquell Tle120Y025Wm Surge Protective DeviceGe Tranquell Tle120Y025Wm Surge Protective Device $125.00
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 $10.99 to Tripp Lite Isobar Surge Protector Medical Metal 6 Outlet 15' CordTripp Lite Isobar Surge Protector Medical Metal 6 Outlet 15' Cord $146.36
SurgeGate Mc04x4 Secondary Telecom Surge Protector 8 Wire Protection Rj-11/45SurgeGate Mc04x4 Secondary Telecom Surge Protector 8 Wire Protection Rj-11/45 $38.99 New Tripp Lite Power Protection Network Surge Protector Dtel2 - 2 Line modem/faxNew Tripp Lite Power Protection Network Surge Protector Dtel2 - 2 Line modem/fax $17.99
Extension OutletExtension Outlet $9.99 Eaton Chspcable Surge Protection For Coax Cables Modem ProtectionEaton Chspcable Surge Protection For Coax Cables Modem Protection $16.00
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 Mobotix Mx-Overvoltage-Protection -Box-Rj45-Lsa with Surge ProtectionMobotix Mx-Overvoltage-Protection -Box-Rj45-Lsa with Surge Protection $40.00
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 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
Furman Ac Power Conditioner Model Ac-215AFurman Ac Power Conditioner Model Ac-215A $70.00 Eaton Surgetrap Sult12Tc Surge Protector with Coax/Network/Phone ProtectionEaton Surgetrap Sult12Tc Surge Protector with Coax/Network/Phone Protection $39.99
Case of 8pcs - Surge Protectors New; 6-Outlet w/8-ft cord Prime Wire & CableCase of 8pcs - Surge Protectors New; 6-Outlet w/8-ft cord Prime Wire & Cable $119.95 Eaton Surge Protection For Coax Cables Electronics Modem Protection ChspcableEaton Surge Protection For Coax Cables Electronics Modem Protection Chspcable $24.99
Upgrade Surge Protection Jumper Cable Clamps for Milwaukee M18 18V BatteryUpgrade Surge Protection Jumper Cable Clamps for Milwaukee M18 18V Battery $46.00 Prime Wire & Cable, Inc. Pb802126 Household Electronics Surge Protectors, 6Prime Wire & Cable, Inc. Pb802126 Household Electronics Surge Protectors, 6 $32.22
Edco Cx06-Bncy Surge Protection Suppressor Arrestor Cable Line Surge - NewEdco Cx06-Bncy Surge Protection Suppressor Arrestor Cable Line Surge - New $17.00 Belkin 12 Outlet Surge Protector w/10' Cord 4156J of Protection for Home TheaterBelkin 12 Outlet Surge Protector w/10' Cord 4156J of Protection for Home Theater $17.99
Used - Panamax M8Hc-Pro Home Theater Pwr Line Cond/Surge Protector - AUsed - Panamax M8Hc-Pro Home Theater Pwr Line Cond/Surge Protector - A $49.99 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
Eaton Db9 Surge Protection Devices (Spd) AccessoriesEaton Db9 Surge Protection Devices (Spd) Accessories $20.78 Anker Surge Protector Power Strip 2100J 12 Outlets Usb Indoor A9192 - BlackAnker Surge Protector Power Strip 2100J 12 Outlets Usb Indoor A9192 - Black $29.99
Monster FlatScreen PowerProtect Avfl 200 Surge Protector 2 Outlets - 1100 JoulesMonster FlatScreen PowerProtect Avfl 200 Surge Protector 2 Outlets - 1100 Joules $8.99 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
Belkin Be112234-10 Surge Protector Surge SuppressorBelkin Be112234-10 Surge Protector Surge Suppressor $24.97 Sqd - Hom250Pspd 50kA Rated Whole Home Surge Protector. No Wiring RequiredSqd - Hom250Pspd 50kA Rated Whole Home Surge Protector. No Wiring Required $80.00
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 Tributaries Pwrs-T1A single outlet Power ModuleTributaries Pwrs-T1A single outlet Power Module $30.00
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 2 - Pack Belkin Be112230-08 12-Outlet Power Strip Surge Protector2 - Pack Belkin Be112230-08 12-Outlet Power Strip Surge Protector $25.00
Furman Pst-2+6 Power Surge Protection / Conditioner. U.S. Authorized DealerFurman Pst-2+6 Power Surge Protection / Conditioner. U.S. Authorized Dealer $59.95 12-Outlet Surge Protect 6 ft. Braided Cord Usb Coax, Black12-Outlet Surge Protect 6 ft. Braided Cord Usb Coax, Black $23.00
New Belkin Surge Protector 6 Outlets 6ft Cord 600 Joules Surge ProtectionNew Belkin Surge Protector 6 Outlets 6ft Cord 600 Joules Surge Protection $23.99
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Prices current as of last update, 04/27/25 9:20pm.

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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