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.

51015 Products showing for Fuses & Circuit Breakers

607 of 999+
  • RS Stock No. 851-1246
  • Mfr. Part No. FNQ-6
Each
£49.34(exc. VAT)
  • RS Stock No. 922-8636
  • Mfr. Part No. 235418 PFIM-80/4/003-MW
Each
£244.70(exc. VAT)
  • RS Stock No. 228-688
  • Mfr. Part No. FNQ-1-1/2
1 Pack of 10
£391.40(exc. VAT)
  • RS Stock No. 259-321
  • Mfr. Part No. 290377 NZMH4-VE1000-S1
Each
£6,822.28(exc. VAT)
  • RS Stock No. 240-929
  • Mfr. Part No. 191631 NZMN2-MX90
Each
£847.79(exc. VAT)
  • RS Stock No. 703-8655
  • Mfr. Part No. 125NHG00B
Each
£6.58(exc. VAT)
  • RS Stock No. 231-8412
  • Mfr. Part No. 5TE4805
Each
£17.41(exc. VAT)
  • RS Stock No. 261-2872
  • Mfr. Part No. 140G-G-PL
Each
£9.28(exc. VAT)
Better World
  • RS Stock No. 772-1329
  • Mfr. Part No. 5SY4220-8
Each
£55.43(exc. VAT)
  • RS Stock No. 263-011
  • Mfr. Part No. 50NHG1B NH FUSE 50A 500V gG SIZE 1 DUAL IND
1 Pack of 3
£21.61(exc. VAT)
  • RS Stock No. 703-8642
  • Mfr. Part No. 40NHG000B
Each
£4.21(exc. VAT)
  • RS Stock No. 347-086
  • Mfr. Part No. C10H6TM063
Each
£1,056.75(exc. VAT)
  • RS Stock No. 259-111
  • Mfr. Part No. 291488 EVG-16/3X1PHAS/8MODUL/HI
Each
£15.73(exc. VAT)
  • RS Stock No. 517-7111P
  • Mfr. Part No. MINISMDC050F-2
Each (Supplied on a Reel)
£0.33(exc. VAT)
  • RS Stock No. 256-954
  • Mfr. Part No. 278941 FAZ-B4/3N
Each
£145.41(exc. VAT)
  • RS Stock No. 256-151
  • Mfr. Part No. 236172 PXL-C50/1N
Each
£83.08(exc. VAT)
  • RS Stock No. 357-468
  • Mfr. Part No. BGF46080
Each
£528.30(exc. VAT)
  • RS Stock No. 261-439
  • Mfr. Part No. BH-1132
Each
£269.56(exc. VAT)
  • RS Stock No. 178-1064
  • Mfr. Part No. V226315 / BTF42V160
Each (In a Pack of 5)
£32.354(exc. VAT)
Better World
  • RS Stock No. 211-2398
  • Mfr. Part No. M9F23232
Each
£87.84(exc. VAT)
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