12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack
Pack of five 12A thermal circuit breakers with waterproof caps and blue wire connectors.
Comparison chart showing a 12Amp thermal circuit breaker with blue wire connectors versus a generic alternative.
12A thermal circuit breaker with manual reset button, protective cap, and terminal connector.
Collage showing wide applications for 12Amp thermal circuit breakers in marine, automotive, and industrial equipment.
Two 12A thermal circuit breakers with blue wire connectors and close-up views of the metal terminal and threaded housing.
12Amp thermal circuit breaker with manual reset button, mounting nut, and wire connector terminal.
BlueStars lifestyle graphic featuring a group of friends sitting on a truck tailgate by a lake.
Pack of five 12A thermal circuit breakers with waterproof caps and blue wire connectors.
Comparison chart showing a 12Amp thermal circuit breaker with blue wire connectors versus a generic alternative.
12A thermal circuit breaker with manual reset button, protective cap, and terminal connector.
Collage showing wide applications for 12Amp thermal circuit breakers in marine, automotive, and industrial equipment.
Two 12A thermal circuit breakers with blue wire connectors and close-up views of the metal terminal and threaded housing.
12Amp thermal circuit breaker with manual reset button, mounting nut, and wire connector terminal.
BlueStars lifestyle graphic featuring a group of friends sitting on a truck tailgate by a lake.

12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack

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$10.56
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12Amp Thermal Circuit Breaker 125/250V AC 32V DC

Key Features

  • Current Rating: 12 Amperes
  • Operating Voltage: 125/250V AC, 32V DC
  • Switch Type: Single pole, push-button manual reset
  • Protection Type: Thermal overload
  • Termination Style: Quick connect terminals
  • Includes waterproof button caps for environmental protection

Replaces / Cross-Reference Part Numbers

  • Designed as a functional replacement for other thermal circuit breakers with identical electrical ratings and physical dimensions.
  • Ensure the following specifications of the original part match:
    • Current: 12A
    • Voltage: 125/250V AC, 32V DC
    • Terminal type and mounting configuration

Compatibility & Fitment

  • For use in a wide range of general-purpose AC and DC circuits requiring overcurrent protection.
  • Common applications include:
    • Power strips and uninterruptible power supplies (UPS)
    • Marine and automotive electrical systems
    • Generators and battery chargers
    • Motors and industrial controls
    • Household appliances
  • Fits standard panel cutouts for this form factor.

When to Replace

  • Existing breaker trips nuisance-free under normal load conditions.
  • Fails to interrupt the circuit during an overload event.
  • Reset button is broken, will not stay depressed, or feels loose.
  • Housing shows signs of cracking, charring, or heat damage.
  • Continuity test fails when the breaker is in the reset position.

Installation Tips

  • Disconnect all electrical power to the circuit before installation.
  • Verify the voltage and amperage ratings of the new breaker match the circuit requirements.
  • Ensure terminal connections are tight and secure to prevent overheating.
  • Mount the breaker firmly to the panel.
  • Use the included waterproof cap if the breaker is installed in a location exposed to moisture.
  • After installation is complete, restore power and test the reset functionality.
12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 1
12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 2
12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 3
  • 12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 1

    Manual Reset

    You can conveniently push the Reset Button back in to connect the circuit again
  • 12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 2

    Fixing symptoms

    Fix the following symptoms: frequent circuit breaker tripping, burning smell, buzzing sounds, hot to the touch, flickering power, etc
  • 12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 3

    Saving solution

    Enjoy the great feeling when your appliances keep clean like new - BlueStars brings DIY solutions to help you deal with any trouble
  • 12Amp Thermal Circuit Breaker 125/250V AC 32V DC - 5 Pack 4

    Simple installation

    BlueStars Thermal Circuit Breaker allows for effortless attachment and detachment
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Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This is a 12-amp thermal circuit breaker rated for 125/250V AC and 32V DC applications. It is designed to interrupt the circuit when the current exceeds the 12-amp threshold, protecting your equipment from electrical overload.
You should consider replacing the breaker if it no longer stays in the 'reset' position, fails to provide power to the device even after being reset, or if it trips repeatedly under normal operating loads. If the internal bimetallic strip has become fatigued or corroded, it will no longer hold the circuit closed.
Installation typically requires a pair of needle-nose pliers for removing the spade terminals and a small wrench or socket to secure the mounting nut. Ensure the power source is completely disconnected before attempting any replacement.
Always verify that the total amperage draw of your appliance or equipment does not exceed the 12-amp rating of the breaker. Additionally, inspect the wiring leads for signs of heat damage or melting; if the wires are charred, they should be trimmed back to clean copper before attaching them to the new breaker terminals.
Thermal breakers rely on an internal bimetallic strip that bends when heated by excess current. Over time, repeated tripping cycles, exposure to moisture, or high-vibration environments can cause the internal contacts to pit or the spring mechanism to weaken, leading to premature failure.