12 Volt Circuit Breakers: 30 to 300 Amp
Automotive circuit breakers for trucks, trailers and upfit equipment, from 30 amp to 300 amp, every one a Buyers Products part. Two reset styles are here: auto reset breakers that reconnect the circuit on their own once they cool, and push-to-trip manual reset breakers that stay off until you press the button. Panel mount versions, large frame breakers at 150 amp and up, and waterproof IP67 versions at 50, 60 and 150 amp cover the high-current and exposed mounting cases.
Part numbers follow the amp rating (CB50, CB100, CB150 for auto reset; CB50PB, CB100PB, CB200PB for push-to-trip), so a fleet shop can reorder by number. Absolute Autoguard ships from Winnipeg across Canada.
12 volt circuit breakers for trucks, plows, liftgates and trailers
A circuit breaker on a work truck replaces a fuse on circuits that see a brief overload in normal service or that need to be disconnected while someone works on them. Buyers Products makes the breakers here in two families: high-amp auto reset (CB50 through CB300, with large frame CB151 and CB201) and high-amp push-to-trip manual reset (CB30PB through CB251PB, including the CB200PB). Ratings run 30, 40, 50, 60, 80, 90, 100, 120, 150, 200, 250 and 300 amp, and the 40 amp units are listed as 12 volt parts.
They sit with the solenoids, fuse blocks and junction boxes in Buyers Products electrical, and with the rest of the Buyers Products catalogue. Light bars and strobes that draw through these circuits are in lighting.
Shop circuit breakers by type
Auto reset circuit breakers
Auto reset breakers reconnect the circuit on their own once they cool. They suit circuits that see brief overloads in normal use, such as wiper motors, heater blowers and lighting. Listed at 40, 50, 60, 100, 150 and 300 amp, with waterproof IP67 versions at 50, 60 and 150 amp.
Push-to-trip manual reset breakers
Push-to-trip breakers stay off until you reset them and can be tripped by hand with the button, which is why installers put them on liftgates, plows and auxiliary hydraulics: the circuit can be positively disconnected during service. Listed from 30 amp (CB30PB) to 250 amp (CB251PB).
Panel mount breakers
Panel mount push-to-trip breakers, such as the 150 amp unit, mount through a dash or switch panel so the reset button is reachable from the seat, which suits a plow or spreader control panel.
Large frame breakers, 150 to 300 amp
Large frame models at 150 amp and up (CB151, CB201, CB300 auto reset; CB151PB, CB201PB manual reset) use a bigger body and heavier studs for high-current feeds such as liftgate power and winch circuits. The breaker switch bracket and the terminal adapter for high-amp breakers are listed alongside.
Common applications
Liftgate installers fit a large frame push-to-trip breaker at the battery feed so the gate can be isolated. Plow and spreader upfitters use panel mount breakers on the control circuit. Fleet shops replace inline fuses on wiper, blower and lighting circuits with auto reset breakers, and trailer shops use IP67 breakers where the mount is exposed to spray.
Why buy circuit breakers here
- Amp rating and reset style in the title. Every breaker is listed as amp rating plus auto reset or push-to-trip, with large frame and IP67 stated where they apply.
- Buyers part numbers. CB and CB-PB numbers follow the amp rating, so CB200PB is the 200 amp push-to-trip and CB150 the 150 amp auto reset.
- Both reset styles at most ratings. 50, 60, 100, 150 and 200 amp are available in either style.
- In stock in Winnipeg. Ships from Winnipeg across Canada; local customers can arrange pickup.
Choosing the right circuit breaker
Match the breaker to the wire gauge and the load's continuous draw; the device or upfit manual usually states the required protection. Choose auto reset for circuits that should recover on their own and push-to-trip for circuits you want to isolate by hand. At 150 amp and above, check whether the feed needs the large frame body. Confirm stud size and mounting style on the product page. If you are not sure what fits, contact us with your year, make, model and configuration.
Common questions
What size circuit breaker do I need?
Match the breaker to the circuit's wire gauge and the load's continuous draw, not just the accessory's peak rating. Fit the rating the circuit was designed for; oversizing removes the protection.
Auto reset or manual reset circuit breaker?
Auto reset breakers cycle back on once they cool and suit wiper, blower and lighting circuits. Push-to-trip breakers stay off until reset and suit liftgates, plows and hydraulics where the circuit must be positively disconnected during service.
Can I replace a fuse with a circuit breaker?
Often yes, at the same amp rating, and it saves carrying spare fuses on circuits that trip in normal service. Confirm the mounting style and stud size on the product page.
Are these 12 volt circuit breakers?
They are automotive breakers for truck and trailer electrical systems; the 40 amp units are listed as 12 volt. Check the product page for the voltage rating before using one on a 24 volt system.