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.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

46604 Products showing for Fuses & Circuit Breakers

6 / 999+
RS PRO 4A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-407
Each (In a Pack of 10)
MYR1.654
RS PRO 100mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9579
Each (In a Pack of 10)
MYR3.979
Schurter PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 284-5300
  • Mfr. Part No. 0034.6612
Each (In a Pack of 10)
MYR3.129
RS PRO 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-532
Each (In a Pack of 10)
MYR1.675
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 412-863
  • Mfr. Part No. 0031.1804
Each (In a Pack of 5)
MYR28.462
Europa RCBO, 32A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC, EUC7R Range
  • RS Stock No. 210-4741
  • Mfr. Part No. EUC7RC.32/1CA
Each
MYR360.90
Littelfuse 0.75A Resettable Fuse, 13.2V dc
  • RS Stock No. 517-7127
  • Mfr. Part No. MINISMDC075F-2
Each (In a Pack of 10)
MYR1.247
Bourns 0.5A Resettable Fuse, 60V
  • RS Stock No. 647-8027
  • Mfr. Part No. MF-SM050-2
Each (In a Pack of 10)
MYR1.792
Littelfuse PC Board Non Resettable Fuse, Axial 5A, 125V ac/dc
  • RS Stock No. 541-3300
  • Mfr. Part No. 0251005.NRT1L
Each (In a Pack of 10)
MYR3.465
RS PRO 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-384
Each (In a Pack of 10)
MYR1.618
Better World
Siemens, SENTRON MCCB 4P 250A, Fixed Mount
  • RS Stock No. 210-1692
  • Mfr. Part No. 3VA1225-1AA42-0AA0
Each
MYR3,252.87
ABB AC Switch Disconnectors Accessories Shaft for use with Switch Disconnectors
  • RS Stock No. 259-9748
  • Mfr. Part No. 1SCA108250R1001
Each
MYR24.95
ABB Connecting Terminals for use with DS941, DS951, SN201
  • RS Stock No. 231-9916
  • Mfr. Part No. 2CSL980001R2515 FEED-IN 25/15 1P
Each
MYR21.25
RS PRO 2.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-627
Each (In a Pack of 10)
MYR1.66
Siemens 63A DIII Diazed Fuse, 440 V dc, 500V ac
  • RS Stock No. 232-2058
  • Mfr. Part No. 5SB4311
Each (In a Pack of 25)
MYR7.322
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3863
  • Mfr. Part No. 8020.0603
Each
MYR5.94
Schurter 2A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3874
  • Mfr. Part No. 8020.5071
Each
MYR4.03
RS PRO 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-419
Each (In a Pack of 10)
MYR1.457
ETI 20A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-670
  • Mfr. Part No. 2312406
Each (In a Pack of 5)
MYR7.182
RS PRO 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9608
Each (In a Pack of 10)
MYR2.014
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