House - Electrical Parts [Lifetime Warranty] 20Amp Thermal Circuit Breaker 125/250V AC 32V DC | Pack of 5
Five 20Amp thermal circuit breakers with matching black reset nuts for 125/250V applications.
Close-up of a single 20Amp thermal circuit breaker with reset button and comparison chart.
Single 20Amp thermal circuit breaker with manual reset button and mounting nut, 125/250V AC rating.
BlueStars 20Amp thermal circuit breaker application examples for marine, automotive, generator, and medical equipment.
Two 20Amp thermal circuit breakers with plastic housing and close-up views of terminals and reset button.
Single 20Amp thermal circuit breaker with manual reset button and mounting nut, close-up view.
Group of friends sitting on the tailgate of a blue pickup truck by a lake with BlueStars branding.
Five 20Amp thermal circuit breakers with matching black reset nuts for 125/250V applications.
Close-up of a single 20Amp thermal circuit breaker with reset button and comparison chart.
Single 20Amp thermal circuit breaker with manual reset button and mounting nut, 125/250V AC rating.
BlueStars 20Amp thermal circuit breaker application examples for marine, automotive, generator, and medical equipment.
Two 20Amp thermal circuit breakers with plastic housing and close-up views of terminals and reset button.
Single 20Amp thermal circuit breaker with manual reset button and mounting nut, close-up view.
Group of friends sitting on the tailgate of a blue pickup truck by a lake with BlueStars branding.
Lifetime Warranty

[Lifetime Warranty] 20Amp Thermal Circuit Breaker 125/250V AC 32V DC | Pack of 5

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20Amp Thermal Circuit Breaker 125/250V AC 32V DC

Key Features

  • Current Rating: 20 Amps
  • Voltage Rating: 125/250V AC, 32V DC
  • Interrupt Capacity: 1000 Amps
  • Switch Type: Single pole, push-button manual reset
  • Protection: Thermal mechanism disconnects circuit during overload conditions
  • Terminals: Standard 0.250-inch quick connect terminals
  • Mounting: Threaded bushing for panel mounting
  • Includes five waterproof button covers

Replaces / Cross-Reference Part Numbers

Replaces push-button thermal circuit breakers with a 20A rating and matching voltage specifications (125/250V AC or 32V DC). Verify physical dimensions for proper fit.

Compatibility & Fitment

Designed for overload protection in a wide range of applications, including:

  • Automotive, marine, and RV electrical systems
  • Power strips and uninterruptible power supplies (UPS)
  • Industrial machinery and control panels
  • Household appliances
  • Low-voltage DC and AC circuits

When to Replace

  • Existing breaker fails to reset after tripping.
  • Breaker trips repeatedly under normal load.
  • Push-button mechanism is stuck, broken, or will not stay engaged.
  • Visible damage such as cracks, burns, or melted plastic on the housing.
  • Unit fails to interrupt power during a known over-current event.

Installation Tips

  • Disconnect all power to the circuit before beginning installation.
  • Confirm the breaker's 20A rating is appropriate for the application and wire gauge.
  • Ensure quick connect terminals are fully seated and secure to prevent arcing.
  • Use the included hardware to fasten the breaker securely to the panel.
  • If used, install the waterproof cover over the button to create a seal against the panel surface.
  • After installation, restore power and test the circuit under a normal load.
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  • Manual Reset

    Manual Reset

    You can conveniently push the Reset Button back in to connect the circuit again
  • Fixing symptoms

    Fixing symptoms

    Fix the following symptoms: frequent circuit breaker tripping, burning smell, buzzing sounds, hot to the touch, flickering power, etc
  • Saving solution

    Saving solution

    Enjoy the great feeling when your appliances keep clean like new - BlueStars brings DIY solutions to help you deal with any trouble
  • Simple installation

    Simple installation

    BlueStars Thermal Circuit Breaker allows for effortless attachment and detachment
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FAQ

These are 20Amp thermal circuit breakers rated for 125V and 250V AC applications. They are designed to trip when the current exceeds the 20A threshold to protect your equipment from electrical overloads.
A failed breaker typically will not reset after it has tripped, or it will trip immediately upon being reset even when the load is within normal operating limits. If you notice the button feeling loose, failing to 'click' into place, or showing signs of internal arcing or burning, it is time for a replacement.
Installation is straightforward and generally requires only a screwdriver to remove the mounting hardware and a pair of needle-nose pliers to disconnect the spade terminals. The entire process usually takes 10 to 15 minutes.
Before replacing the breaker, inspect the wiring connected to the terminals for signs of heat damage or loose connections. If the wires are brittle or melted, they should be trimmed back to clean copper or replaced entirely to ensure a proper connection. Always ensure the power source is disconnected before beginning work.
Thermal breakers often fail due to repeated cycling under high-heat conditions or age-related fatigue of the internal bimetallic strip. Frequent tripping caused by a short circuit or a motor that is drawing excessive current—often due to mechanical resistance or a failing capacitor—will accelerate the wear on these components.