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.

50907 Products showing for Fuses & Circuit Breakers

541 of 999+
  • RS Stock No. 243-081
  • Mfr. Part No. 192280 NZMS3-4-PX250/VAR
Each
£2,886.90(exc. VAT)
Better World
  • RS Stock No. 155-809
  • Mfr. Part No. 3VA2325-8JP32-0AA0
Each
£1,997.49(exc. VAT)
  • RS Stock No. 346-712
  • Mfr. Part No. KSA1000DLE4CFM
Each
£3,364.39(exc. VAT)
  • RS Stock No. 242-944
  • Mfr. Part No. 187410 FRCMM-63/4/003-G/F
Each
£365.65(exc. VAT)
  • RS Stock No. 336-610
  • Mfr. Part No. SE10C320
Each
£103.09(exc. VAT)
  • RS Stock No. 253-533
  • Mfr. Part No. 259507 NZM2/3-XU12DC
Each
£135.20(exc. VAT)
  • RS Stock No. 610-500
  • Mfr. Part No. 5SY8506-8
Each
£95.00(exc. VAT)
  • RS Stock No. 252-940
  • Mfr. Part No. 211823 AZ-2-D80
Each
£306.61(exc. VAT)
  • RS Stock No. 246-2245
  • Mfr. Part No. 2CCF544220E0630 F404A-S63/0.1
Each
£262.22(exc. VAT)
  • RS Stock No. 247-1851
  • Mfr. Part No. 33642
Each
£340.10(exc. VAT)
  • RS Stock No. 237-6241
  • Mfr. Part No. 1SDA067102R1 XT2N 160 Ekip LSI 10A FF
Each
£1,029.27(exc. VAT)
  • RS Stock No. 250-4401
  • Mfr. Part No. 1SCA022697R3310
1 Box of 3
£43.83(exc. VAT)
  • RS Stock No. 231-9737
  • Mfr. Part No. 2CDS272061R0427 S202 MUC K 10A 10 KA
1 Box of 1
£174.03(exc. VAT)
  • RS Stock No. 552-976
  • Mfr. Part No. 0251003.MAT1L
1 Bag of 100
£45.80(exc. VAT)
  • RS Stock No. 248-667
  • Mfr. Part No. 100NHG01BI NH FUSE 100A 500V GL/GG SIZE 01
1 Pack of 3
£19.42(exc. VAT)
  • RS Stock No. 230-3503
  • Mfr. Part No. G217172
Each (In a Pack of 10)
£1.428(exc. VAT)
  • RS Stock No. 231-9952
  • Mfr. Part No. 2CSR255188R1165 DS201T B16 A30
1 Box of 1
£221.07(exc. VAT)
  • RS Stock No. 231-9360
  • Mfr. Part No. 1SDA104853R1 RHE XT6 F/P
Each
£180.21(exc. VAT)
  • RS Stock No. 203-1998
  • Mfr. Part No. 3NA3352
Each (In a Pack of 3)
£25.46(exc. VAT)
  • RS Stock No. 239-875
  • Mfr. Part No. 184227 IZMX-PLPC40-M-1
Each
£90.99(exc. VAT)
Results per page