Breakers, Fuses & Controls

10+ products

Expected delivery: Wed, Nov 18

Circuit protection and control parts for panels, machines and vehicles. The range includes plug-on and bolt-on circuit breakers in one, two and three pole versions, cartridge fuses in common UL classes such as CC, J and RK5, glass and ceramic fuses, blade fuses for vehicles, fuse holders and blocks, relays, contactors, timers, motor starters, pushbuttons, selector switches, pilot lights and disconnects.

What to check before you order

  • Breaker type for the panel. A breaker must be listed for the panel it goes into. Check the panel label for the accepted breaker types.
  • Fuse class and ratings. Match the class, amp rating, voltage rating and interrupting rating of the fuse being replaced. Never install a higher amp fuse or breaker than the circuit is designed for.
  • Coil voltage. Relays and contactors list a coil voltage, such as 24 V or 120 V, plus contact ratings. Both must match the control circuit.
  • Operator size and enclosure rating. Pushbuttons and pilot lights come in standard mounting hole sizes like 22 mm and 30 mm. Check the NEMA or IP rating for washdown or dusty areas.

Panel and control work should be done by a qualified person to code, under NFPA 70E and your site's lockout program. Lockout devices and tags are in first aid, signs and lockout. Meters for troubleshooting are in testers and meters, and more parts are under electrical.

Common questions

What is the difference between a time-delay and a fast-acting fuse?

A time-delay fuse rides through brief inrush current, such as a motor starting. A fast-acting fuse opens quickly and often protects electronics. Replace with the type the equipment calls for.

What is the difference between a relay and a contactor?

Both are coil-operated switches. Contactors switch higher current loads like motors and lighting, while relays usually switch control circuits.

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