Contactors & Switches

A contactor is an electrically-activated switch (relay) allowing a low power circuit to control a high power circuit, such as a 12-volt electromagnetic coil controlling a 96-volt motor controller circuit.

Contactors are relays with heavy duty contacts typically rated for high maximum voltage and current. Standard relays are smaller with lower current limits.

Motor controllers have specific contactor requirements based on the coil and power circuit specifications. For instance, different controllers may use 12, 24 or 48 volt coils to close the contactor. FAQ

$75.00
This electromechanical power switch is an excellent choice for main contactors in many EV systems. Includes a built-in economizer circuit with reduced coil...
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$125.00
500+ Amp, 12-72Vdc Sealed Contactors
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$150.00
Manual locking disconnect for your traction battery, for use as maintenece disconnect switch. This switch is rated for 1000 Volts at 400 amps continus and...
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$100.00
High voltage pack disconnect. Used units may also be available. Please contact us for pricing if interested. PNs: 1-1587987-1 , 1-2103172-1 , 170M3418 
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$15.00
Mount on your vehicle for low-current switching in case of an accident.
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$25.00
2 position Key Switch. Three screw tab terminals.  
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$50.00
This is for high-voltage EV controllers without an internal pre-charge circuit, for instance the Nissan Leaf and UQM inverters.
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$25.00
Use this 40 amp solid state relay to switch the AC side of a charger using the MCU, BMSC or EVCC outputs. Device may vary from the unit shown. Features...
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$25.00
Use this 25 amp solid state relay to switch DC circuits using the MCU, BMSC or EVCC outputs. Device may vary from the unit shown. Features 3-32...
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$5.00
This light duty relay can be used for automotive and marine control circuits. The low current coil circuit makes it possible for battery, charge and motor...
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$20.00
This Bussman fused relay provides two fused outputs - one is unswitched and one is switched by the embedded relay. See spec sheet link in the "Manuals and...
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$50.00
Barely used contactors that were removed from vehicles.  
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$90.00
White-Rogers Heavy Duty 24 volt 4 Terminal Solenoid.
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$60.00
White-Rogers Light Duty 24 volt 4 Terminal Solenoid
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$400.00
The Kilovac EV250-2 is a general-purpose high voltage contactor. 12 or 24v coil options available. Coil connector is not included. 12 and 24 Volt models...
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[Contact us for a price]
What size do you need? New Surplus Contactors available. Call 707.578.7973  or email  connect@thunderstruck-ev.com for pricing and availability.
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$5.00
This DPDT switch is an ON-OFF-ON type without spring return. Thunderstruck uses these switches for FNR (forward/neutral/reverse) switching in EV accessory...
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$5.00
Handlebar button fits 7/8" bar. Good for horn, or for a secret starting circuit!
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$10.00
Fits on your handlebar. Two position ON/OFF.
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