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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

56 / 999+
Better World
Schneider Electric 100A F Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 211-2288
  • Mfr. Part No. DF2FN100
Each (In a Pack of 10)
MYR215.64
Better World
ABB System Pro M Compact S200M MCB, 2P, 20A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-116
  • Mfr. Part No. 2CDS272001R0204 S202M-C20
Each
MYR336.39
Littelfuse 3A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 876-8448
  • Mfr. Part No. KLDR003.TXP
Each
MYR200.86
Better World
ABB System Pro M Compact S200 MCB, 1P, 8A Curve K, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7955
  • Mfr. Part No. 2CDS251001R0407 S201-K8
Each
MYR189.77
Lovato ModuLo P1MB MCB, 4P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5977
  • Mfr. Part No. P1MB4PC32
Each
MYR646.32
Eaton 100A Rail Mount Fuse Holder, 1P, 460 V dc, 660 → 690V ac
  • RS Stock No. 182-1419
  • Mfr. Part No. RS100PWH
Each (In a Box of 5)
MYR959.636
Eaton 6A T Cartridge Fuse, 21 x 57mm
  • RS Stock No. 773-3536
  • Mfr. Part No. LPJ-6SP
Each
MYR333.07
Siemens SENTRON Busbar, 60mm Pitch
  • RS Stock No. 196-3719
  • Mfr. Part No. 8US19222UA01
Each
MYR764.13
Littelfuse Spring Brass PCB Mount Fuse Clip for 6.3 x 32mm Cartridge Fuse
  • RS Stock No. 787-4249
  • Mfr. Part No. 01020071Z
Each (In a Pack of 10)
MYR1.287
Better World
Schneider Electric Acti 9 Adapter for use with iC60 MCB, iC60 Rotary Handle, iDPN Vigi, ilD MCB, iSW-NA
  • RS Stock No. 791-3035
  • Mfr. Part No. A9A27008
Each
MYR301.45
Eaton RCD, 20A, 2 Pole, 30mA, Type C
  • RS Stock No. 922-8733
  • Mfr. Part No. 236245 PKNM-20/1N/C/003-MW
Each
MYR850.64
Eaton 400A T Cartridge Fuse, 51 x 182mm
  • RS Stock No. 182-1354
  • Mfr. Part No. LPJ-400SP
Each
MYR3,876.22
Socomec 12A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 223-2785
  • Mfr. Part No. 60120012
Each (In a Pack of 10)
MYR5.86
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 273-0854
  • Mfr. Part No. 1658-G21-02-P10-5A
Each
MYR31.41
Littelfuse SMD Non Resettable Fuse 375mA, 125V ac/dc
  • RS Stock No. 541-3344
  • Mfr. Part No. 0451.375MRL
Each (In a Pack of 10)
MYR6.648
Wickmann 500mA F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0740
  • Mfr. Part No. 0508.500MXP
Each (In a Pack of 10)
MYR32.997
ABB, XT4N MCCB 4P 200A, Fixed Mount
  • RS Stock No. 236-6593
  • Mfr. Part No. 1SDA068104R1 XT4N 250 TMA 200A 3P+N FF
Each
MYR4,955.82
Siemens 1 Phase Surge Protector, 25kA, DIN Rail Mount
  • RS Stock No. 211-0192
  • Mfr. Part No. 5SD7463-1
Each
MYR2,021.33
RS PRO Non-Resettable Surface Mount Fuse 30A, 80V
  • RS Stock No. 240-8271
Each (In a Pack of 10)
MYR13.605
Mersen 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6984
  • Mfr. Part No. S218194
Each (In a Pack of 10)
MYR8.423
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