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Circuit Breakers
Circuit breakers are resettable protective devices that automatically stop electrical flow when a circuit becomes overloaded, shorted, or otherwise unsafe. They help protect wiring, components, and systems from damage while reducing the risk of overheating and fire. Unlike fuses, circuit breakers can be reset after the fault is cleared, making them a reliable and reusable solution for circuit protection across a wide range of applications. More...
Common Applications:
Residential & consumer systems — load centers, appliances, and branch circuits
Commercial infrastructure — lighting, HVAC, and building distribution panels
Industrial equipment — motor protection, control panels, and automation systems
Power distribution — switchgear, panelboards, and feeder circuits
Energy systems — solar installations, battery storage, and backup generators
How to Choose a Circuit Breaker:
Current (Amperage) Rating — align with circuit load and conductor size
Voltage Rating — ensure compatibility with system voltage (AC or DC)
Interrupting Capacity (kAIC) — match to the available fault current
Trip Characteristics — select the appropriate curve for your load (e.g., fast trip vs. motor-friendly delay)
Poles & Mounting Type — choose the correct configuration for your system and panel
Circuit breakers are in stock at Mouser and available for same-day shipping. Mouser is an authorized distributor for many circuit breaker manufacturers including ABB, Carling Technologies, Eaton, E-T-A Circuit Breakers, Phoenix Contact, Sensata, Schurter, Siemens, TE Connectivity & more.
Please view our selection of circuit breakers below.
