Electrical Breakers | McMaster-Carr

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5,000 amp @ 120V AC

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697 Products

Circuit Breakers

Square D Load-Center Circuit Breakers

Square D Load-Center Circuit Breakers

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

DIN-Rail Mount Equipment Circuit Breakers

DIN-Rail Mount Equipment Circuit Breakers

Protect a piece of equipment downstream from a branch circuit breaker

DIN-Rail Mount Branch Circuit Breakers

DIN-Rail Mount Branch Circuit Breakers

Safeguard equipment and wiring in an area of your facility

Cutler-Hammer Load-Center Circuit Breakers

Cutler-Hammer Load-Center Circuit Breakers

Install into Cutler-Hammer CH series breaker boxes

Siemens Load-Center Circuit Breakers

Siemens Load-Center Circuit Breakers

Use with Siemens EQ series breaker boxes

Harsh-Environment Circuit Breakers

Harsh-Environment Circuit Breakers

Resist vibration and corrosion in harsh environments

High-Temperature Panel-Mount Circuit Breakers

High-Temperature Panel-Mount Circuit Breakers

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

High-Power Circuit Breakers

High-Power Circuit Breakers

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

Panel-Mount Equipment Circuit Breakers

Panel-Mount Equipment Circuit Breakers

Mount through panels to protect a single piece of equipment

DIN-Rail Mount Ground Fault Circuit Protectors

DIN-Rail Mount Ground Fault Circuit Protectors

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

Space-Saving Panel-Mount Branch Circuit Breakers

Space-Saving Panel-Mount Branch Circuit Breakers

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

Plug-Base Circuit Breakers

Plug-Base Circuit Breakers

Replace any Edison-base fuse with these resettable circuit breakers

Blade-Style Circuit Breakers

Blade-Style Circuit Breakers

Protect low-voltage automotive and electronic applications

DIN-Rail Mount Electronic Circuit Breakers

DIN-Rail Mount Electronic Circuit Breakers

Continuously monitor current and trip at a precise value

Other Products

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

Circuit Breaker Boxes

Circuit Breaker Boxes

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

Outlet Boxes

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

Circuit Interrupters

Circuit Interrupters

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

Power Connectors

Power Connectors

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

Outlet Strips

Plug in multiple devices to power them from a single outlet

Extension Cords

Extension Cords

Extend the reach of power from an outlet

Battery Chargers

Battery Chargers

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

Extension Cord Reels

Extension Cord Reels

Keep extension cords easy to access without creating a tripping hazard

Monitoring Relays

Monitoring Relays

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

Extension Cord Circuit Interrupter Converters

Extension Cord Circuit Interrupter Converters

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

Temporary Power Distribution Boxes

Temporary Power Distribution Boxes

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

Power Cords

Connect equipment and devices to a power source

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)