Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

51057 Products showing for Fuses & Circuit Breakers

622 of 999+
  • RS Stock No. 262-617
  • Mfr. Part No. CHM4DIU
1 Pack of 3
£80.47
  • RS Stock No. 181-8910
  • Mfr. Part No. 20D27
Each
£2.33
Better World
  • RS Stock No. 156-659
  • Mfr. Part No. 3VA2225-5JP42-0AA0
Each
£1,530.06
  • RS Stock No. 237-6248
  • Mfr. Part No. 1SDA067126R1 RC Sel XT2 F
Each
£748.48
  • RS Stock No. 210-2074
  • Mfr. Part No. 3120-N521-H7T1-W01D-5A
Each
£27.59
  • RS Stock No. 237-5138
  • Mfr. Part No. 2CSR272001R1165 DS202 M AC-B16/0.03
Each
£185.01
  • RS Stock No. 703-8226
  • Mfr. Part No. PV-5A10F
Each
£9.70
Better World
  • RS Stock No. 383-1992
  • Mfr. Part No. 5SY4120-6
Each
£18.74
  • RS Stock No. 218-8715
  • Mfr. Part No. 1492-SPM1B200-N
Each
£36.09
  • RS Stock No. 237-6039
  • Mfr. Part No. 1SDA066288R1 FP XT2 P > FP XT2 W
Each
£141.83
  • RS Stock No. 187-5185
  • Mfr. Part No. 5ST3673-0
Each
£31.29
  • RS Stock No. 226-0371
  • Mfr. Part No. 7545000
Each
£125.31
  • RS Stock No. 140-620
  • Mfr. Part No. 2CCS883001R0321
Each
£127.22
  • RS Stock No. 177-5097
  • Mfr. Part No. 2CSF204201R4900 F204 A S-100/0,5
Each
£377.02
  • RS Stock No. 257-024
  • Mfr. Part No. 279050 FAZ-C2,5/4
Each
£202.38
  • RS Stock No. 127-430
  • Mfr. Part No. 180611 FRCMM-100/2/003-A-110
Each
£603.63
  • RS Stock No. 254-757
  • Mfr. Part No. 250MJ30-7 250A 415V AC TYPE J F/PILLAR FUSE
1 Pack of 5
£143.40
Better World
  • RS Stock No. 212-8848
  • Mfr. Part No. 5SY4615-8
Each
£149.04
  • RS Stock No. 731-9869
  • Mfr. Part No. 4 107 08
Each
£277.08
  • RS Stock No. 247-2724
  • Mfr. Part No. D211557
1 Box of 10
£66.87
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