AC Circuit Breakers | McMaster-Carr

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589 Products

Circuit Breakers

DIN-Rail Mount Equipment Circuit Breakers

Protect a piece of equipment downstream from a branch circuit breaker

113 products

Square D Load-Center Circuit Breakers

Match to Square D breaker boxes or panel boards of the same manufacturer series

48 products

DIN-Rail Mount Branch Circuit Breakers

Safeguard equipment and wiring in an area of your facility

108 products

High-Power Circuit Breakers

Protect an area of a facility that has high-powered equipment

16 products

Siemens Load-Center Circuit Breakers

Use with Siemens EQ series breaker boxes

10 products

Panel-Mount Equipment Circuit Breakers

Mount through panels to protect a single piece of equipment

34 products

Cutler-Hammer Load-Center Circuit Breakers

Install into Cutler-Hammer CH series breaker boxes

10 products

High-Temperature Panel-Mount Circuit Breakers

The hydraulic-magnetic trip mechanism is not affected by temperature changes

11 products

Space-Saving Panel-Mount Branch Circuit Breakers

Small enough to fit in tight spaces, these circuit breakers mount through panels

2 products

DIN-Rail Mount Ground Fault Circuit Protectors

Minimize the risk of electric shock to workers and equipment if there is a current leak

6 products

Blade-Style Circuit Breakers

Protect low-voltage automotive and electronic applications

13 products

Plug-Base Circuit Breakers

Replace any Edison-base fuse with these resettable circuit breakers

3 products

Other Products

Circuit Interrupters

Ground fault protection stops injuries from electric shocks; hardwire to equipment to break circuits

1 product

Circuit Breaker Boxes

Hold a series of circuit breakers in line; also known as load centers

49 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

104 products

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

20 products

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

3 products

Extension Cord Circuit Interrupter Converters

Hardwire to extension cords to protect against electric shock in wet areas

9 products

Extension Cord Reels

Keep extension cords easy to access without creating a tripping hazard

27 products

Power Cords

Connect equipment and devices to a power source

2 products

Extension Cords

Extend the reach of power from an outlet

36 products