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.

50958 Products showing for Fuses & Circuit Breakers

725 of 999+
  • RS Stock No. 738-3021
  • Mfr. Part No. 0251005.MRT1L
Each (In a Pack of 10)
£0.856
  • RS Stock No. 221-3493
  • Mfr. Part No. 278794 FAZ-K6/2
Each
£91.06
  • RS Stock No. 266-1324
  • Mfr. Part No. 407907
Each
£162.67
  • RS Stock No. 304-2906
  • Mfr. Part No. F098031
Each
£128.93
  • RS Stock No. 335-133
  • Mfr. Part No. C160H4FM
Each
£5,559.97
  • RS Stock No. 354-301
  • Mfr. Part No. KSA400DLE41F
Each
£1,732.45
  • RS Stock No. 230-278
  • Mfr. Part No. 107845 NZMN2-VE250-BT-NA
Each
£1,836.73
  • RS Stock No. 247-2843
  • Mfr. Part No. N222215
1 Box of 10
£61.99
  • RS Stock No. 787-4356P
  • Mfr. Part No. FHAC0001ZXJG
Each (Supplied in a Bag)
£4.38
Better World
  • RS Stock No. 175-1530
  • Mfr. Part No. GV4PE115N
Each
£544.38
  • RS Stock No. 257-678
  • Mfr. Part No. 3VA5560-5EC42-2AA0
Each
£2,559.95
Better World
  • RS Stock No. 236-7457
  • Mfr. Part No. 1SDA067719R1 XT2N 160 TMG 32A FF
Each
£262.83
  • RS Stock No. 119-256
  • Mfr. Part No. LV429490
Each
£1,154.88
  • RS Stock No. 249-510
  • Mfr. Part No. 3VA6580-7KL46-0AA0
Each
£5,821.19
  • RS Stock No. 230-1081
  • Mfr. Part No. 264749 PLG4-C32/1N
Each
£11.04
  • RS Stock No. 229-032
  • Mfr. Part No. 35D33Q
1 Pack of 5
£8.93
  • RS Stock No. 273-2296
  • Mfr. Part No. 140MT-C-PE38
Each
£14.07
  • RS Stock No. 162-007
  • Mfr. Part No. 5SF4230
Each
£107.13
  • RS Stock No. 769-3191
  • Mfr. Part No. SR-5-1-25A-BK
Each (In a Pack of 10)
£0.465
  • RS Stock No. 418-726
  • Mfr. Part No. SSD10
Each (In a Pack of 5)
£2.486
Results per page