Breakers | McMaster-Carr

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2B999

EAR99

DFARS Specialty Metals

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854 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

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

Harsh-Environment Circuit Breakers

Resist vibration and corrosion in harsh environments

31 products

Cutler-Hammer Load-Center Circuit Breakers

Install into Cutler-Hammer CH series breaker boxes

10 products

Panel-Mount Equipment Circuit Breakers

Mount through panels to protect a single piece of equipment

34 products

High-Temperature Panel-Mount Circuit Breakers

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

11 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

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

Other Products

Circuit Breaker Boxes

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

49 products

T-Slotted Framing Grounding Terminals

Prevent static buildup in T-slotted framing from becoming a shock hazard

1 product

Circuit Interrupters

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

1 product

Nut Cutters

Remove frozen, rusted, and stubborn nuts; also known as nut splitters

12 products

Circuit Breaker Box Filler Plates

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

2 products

Vacuum Breakers

When pressure drops, vents open to prevent suction from drawing liquid back upstream

33 products

Power Receptacles

Install in a wall or panel to transmit power to plugs or sockets

16 products

Strapping Breakers

Cut strapping on cartons, pallet loads, and crates to access contents

2 products

Power Cords

Connect equipment and devices to a power source

2 products

Extension Cord Circuit Interrupter Converters

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

9 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

103 products

Demolition Hammers

Break through pavement, asphalt, and concrete walls and floors

45 products

Outlet Boxes

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

2 products

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

21 products

Battery Chargers

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

3 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

Conveyor Belt Installation Tools

Add or remove links on belting

1 product

Chisel Bits

Pair with powered hammers or needle scalers to chip material off of workpieces

37 products

Roller Chain Breakers

Open links to alter roller chain length

18 products

Extension Cords

Extend the reach of power from an outlet

36 products

Roller Chain Spring Clip Removal Tools

Push or twist to remove spring clips from links

2 products

Power Adapters

NEMA connection adapters, outlet adapters, and outlet splitters

4 products

Roller Chain Breaker/Riveters

Alter roller chain length or strengthen it for better performance on high-speed drives

2 products

Strapping Cutters

Cut through steel and plastic strapping

9 products

Metal Strip Cutters

Snip through thin rings and narrow bands that are flush against another surface

2 products