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.

50973 Products showing for Fuses & Circuit Breakers

655 of 999+
Better World
  • RS Stock No. 191-6097
  • Mfr. Part No. A9P22720
Each
£160.78
  • RS Stock No. 201-6890
  • Mfr. Part No. 2CSR275180R1404
Each
£133.31
  • RS Stock No. 220-5800
  • Mfr. Part No. 1135740
Each
£45.47
  • RS Stock No. 231-9786
  • Mfr. Part No. 2CDS281001R0277 S20K 2A - 25 KA
Each
£36.16
  • RS Stock No. 273-2320
  • Mfr. Part No. 140MT-C-W453
Each
£12.42
  • RS Stock No. 124-2501
  • Mfr. Part No. 7TCA083670R0679 LK243-8
Each
£240.57
  • RS Stock No. 260-8065
  • Mfr. Part No. C4031M320
Each
£828.31
  • RS Stock No. 192-0833
  • Mfr. Part No. 1SDA068070R1
Each
£865.67
Better World
  • RS Stock No. 209-7452
  • Mfr. Part No. 5SL4301-7
Each
£87.64
  • RS Stock No. 207-300
  • Mfr. Part No. KSB250DC4SP
Each
£1,361.68
  • RS Stock No. 731-9847
  • Mfr. Part No. 4 107 05
Each
£256.24
  • RS Stock No. 852-7538
  • Mfr. Part No. JT60060
Each (In a Pack of 12)
£49.055
  • RS Stock No. 706-1936
  • Mfr. Part No. 3RV2902-1AV0
Each
£29.37
  • RS Stock No. 852-7578
  • Mfr. Part No. SC-8
Each
£16.70
  • RS Stock No. 231-9370
  • Mfr. Part No. 1SDA105031R1 HTC-ES XT5 3p
Each
£62.31
  • RS Stock No. 258-443
  • Mfr. Part No. 274239 NZMN1-A50-NA
Each
£414.12
  • RS Stock No. 540-1616
  • Mfr. Part No. 2CSF202006R1250 FH202 AC-25/0,03
Each
£98.38
  • RS Stock No. 141-201
  • Mfr. Part No. 2CCS862001R1637
Each
£280.15
  • RS Stock No. 251-5281
  • Mfr. Part No. SPD-10-275-G2
Each
£11.69
  • RS Stock No. 628-852
  • Mfr. Part No. 8GK6730-4KK23
Each
£129.42
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