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Small plastic automotive circuit breaker with blade terminals

Eaton Bussmann

Eaton Bussmann UCB-25 Automotive Circuit Breaker 25 A 12V car electronics accessory

SKU CH-QYVJ-BSVNB

Automatically resets after a 25 A, 12 V DC overload in boats, buses, RVs or trucks and meets SAE J553 standards

  • TypeAutomotive Electrical & Lighting
  • Automatic reset restores power without manual replacement
  • 25 A rating protects 12 V DC circuits from overloads
  • SAE J553 compliance confirms automotive safety standards
  • Type I ATC design fits standard fuse-block spacing
  • 1 kA interrupt capacity handles short-circuit faults safely

25 A Automotive Circuit Breaker

This Eaton Bussmann UCB-25 is a Type I ATC circuit breaker rated at 25 A and 12V DC. It fits standard fuse-block spacing with recessed fuse terminals and blade connections. The plastic housing measures 3/8 in deep, 3/8 in high and 7/8 in wide. It carries SAE J553 compliance for automotive electrical safety.

Automatic Reset Protection

The breaker uses an automatic reset mechanism that restores power after a fault clears without manual intervention. Its interrupt rating is 1 kA at 12V DC, suitable for typical vehicle circuits. The plug-in, surface-mount design allows quick installation in compatible fuse blocks. No manual lever or button is required to resume operation.

For 12 V DC Vehicle Circuits Needing Auto-Reset

Boats, buses, RVs and trucks with 12 V DC systems can use this breaker for circuit protection where automatic recovery is preferred. It is not suited for applications requiring a manual reset or a higher interrupt rating. Buyers needing a different current rating or voltage should select another device.

Highlights

  • Automatic reset restores power without manual replacement
  • 25 A rating protects 12 V DC circuits from overloads
  • SAE J553 compliance confirms automotive safety standards
  • Type I ATC design fits standard fuse-block spacing
  • 1 kA interrupt capacity handles short-circuit faults safely

Specifications

BrandEATON BUSSMANN
TypeAutomotive Electrical & Lighting

Questions about this item

What does the 25 A current rating mean when the breaker is installed in a 12 V DC system?

It will carry up to 25 A continuously and trip automatically if the load exceeds that value, protecting wiring on 12 V DC circuits in boats, buses, RVs or trucks.

How does the SAE J553 standard limit the breaker's interrupt capability?

The breaker is rated to interrupt 1 kA at 12 V DC under SAE J553, so it can safely clear a short-circuit up to that level on a 12 V DC supply.

What physical space is needed to plug the breaker into an ATC fuse block?

The plug-in body measures 7/8 in wide by 3/8 in high by 3/8 in deep and uses blade terminals that fit standard ATC fuse-block spacing with recessed terminals.

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