Electrical Breakers | McMaster-Carr

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699 Products

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Circuit Breakers

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 Equipment Circuit Breakers

Protect a piece of equipment downstream from a branch circuit breaker

113 products

DIN-Rail Mount Branch Circuit Breakers

Safeguard equipment and wiring in an area of your facility

109 products

Siemens Load-Center Circuit Breakers

Use with Siemens EQ series breaker boxes

10 products

High-Power Circuit Breakers

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

16 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

Harsh-Environment Circuit Breakers

Resist vibration and corrosion in harsh environments

31 products

Panel-Mount Equipment Circuit Breakers

Mount through panels to protect a single piece of equipment

34 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

Plug-Base Circuit Breakers

Replace any Edison-base fuse with these resettable circuit breakers

3 products

Blade-Style Circuit Breakers

Protect low-voltage automotive and electronic applications

37 products

DIN-Rail Mount Electronic Circuit Breakers

Continuously monitor current and trip at a precise value

11 products

Space-Saving Panel-Mount Branch Circuit Breakers

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

2 products

Other Products

Circuit Breaker Box Filler Plates

Conceal live electrical components in circuit breaker boxes to prevent injury and damage

2 products

Circuit Breaker Boxes

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

49 products

Circuit Interrupters

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

1 product

Outlet Boxes

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

3 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

105 products

Extension Cords

Extend the reach of power from an outlet

36 products

Power Connectors

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

22 products

Extension Cord Reels

Keep extension cords easy to access without creating a tripping hazard

27 products

Monitoring Relays

Trip circuits or sound an alarm when voltage, current, or other limits are exceeded

31 products

Extension Cord Circuit Interrupter Converters

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

9 products

Temporary Power Distribution Boxes

Send power to equipment from generators or other sources when electricity is not available

4 products

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

3 products

Power Cords

Connect equipment and devices to a power source

2 products