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Black plastic automotive circuit breaker with two stud terminals and a push-to-trip button

Buyers Products Company

Buyers Products Company CB120PB Hi-Amp Circuit Breaker 120 A 42V DC

SKU CH-6RAD-PQVKK

A 120 A hi-amp circuit breaker rated for 42 V DC with push-to-trip actuation and manual reset

  • Protects 120 A circuits with manual reset
  • Rated for 42 V DC automotive systems
  • Push-to-trip actuator allows quick manual disconnection
  • Bolt-on surface mount simplifies installation
  • Plastic housing resists corrosion in auxiliary circuits

Automotive circuit breaker 120 A 42 V DC

This hi-amp circuit breaker protects auxiliary and accessory circuits in automotive electrical systems. It carries a 120 A current rating and a 42 V DC voltage rating with a matching 120 A interrupt rating at 42 V DC. The push-to-trip actuator allows manual circuit interruption for testing or emergency isolation. Manual reset restores power after a fault is cleared.

For auxiliary circuit protection only

Installers protecting lighting, winch feeds or accessory power distribution at or below 42 V DC will find the ratings appropriate. The stud terminals suit ring-lug connections common in vehicle wiring. It is not suited to systems operating above the stated voltage ceiling. Buyers needing automatic reset behaviour or a different mounting style should consider other options.

120 A interrupt rating at 42 V DC

The interrupt rating defines the maximum fault current the breaker can safely open without damage. This figure must exceed the prospective short-circuit current of the circuit it protects. Verify the available fault current against the 120 A rating before specifying the device.

Highlights

  • Protects 120 A circuits with manual reset
  • Rated for 42 V DC automotive systems
  • Push-to-trip actuator allows quick manual disconnection
  • Bolt-on surface mount simplifies installation
  • Plastic housing resists corrosion in auxiliary circuits

Specifications

BrandBUYERS PRODUCTS

Questions about this item

How do I confirm the 120 A breaker is operating correctly after installation?

After mounting, press the push-to-trip actuator; the breaker should open the circuit. Reset it manually and verify that the connected 42 V DC accessory circuit remains powered under normal load.

What comes with the CB120PB and what must I supply?

The breaker itself is supplied with stud terminals for bolt-on mounting. You must provide mounting hardware, wiring, and appropriate lugs or ring terminals for the stud connections.

Which current rating should I select for my auxiliary circuit?

Choose the 120 A version when the protected accessory circuit is designed for up to 120 A at 42 V DC; the interrupt rating matches the current rating at that voltage.

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