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

80 / 999+
Siemens 16A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-235
  • Mfr. Part No. 3NA6805
Each (In a Pack of 3)
MYR38.703
Eaton 16A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 703-8689P
  • Mfr. Part No. 16NHG01B
Each (Supplied in a Box)
MYR50.51
Eaton xPole MCB, 1P, 16A Curve C, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4327
  • Mfr. Part No. 242206 PLSM-C16-MW
Each
MYR89.62
RS PRO 16A British Standard Fuse, F1, 550V ac
  • RS Stock No. 521-2927
Each (In a Pack of 5)
MYR22.87
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 272-0182
  • Mfr. Part No. 3VA1580-5EF32-0AA0
Each
MYR14,563.68
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 2P, 600V ac
  • RS Stock No. 144-1799
  • Mfr. Part No. 0031.9161
Each (In a Box of 25)
MYR76.234
Mersen 2A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0604
  • Mfr. Part No. Q1014567 / FR10GR69V2
Each
MYR48.15
Better World
Siemens Sentron 5SY6 MCB, 1P, 20A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6524
  • Mfr. Part No. 5SY6120-7
Each
MYR110.07
Schurter 16A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 600V ac
  • RS Stock No. 167-6951
  • Mfr. Part No. 0751.0056
1 Bag of 20
MYR28.34
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS Stock No. 895-1675P
  • Mfr. Part No. 37211000411
Each (Supplied in a Bag)
MYR3.119
Socomec 32A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 122-5275
  • Mfr. Part No. 60220032
Each (In a Pack of 10)
MYR10.317
Better World
Schneider Electric, Compact MCCB 3P 220A, Breaking Capacity 75 kA, Fixed Mount
  • RS Stock No. 212-0273
  • Mfr. Part No. LV433503
Each
MYR10,693.07
Littelfuse 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 820-7259
  • Mfr. Part No. LPHV0001Z
Each
MYR81.03
ABB FH200 RCCB, 63A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 186-3460
  • Mfr. Part No. 2CSF202102R1630
Each
MYR552.48
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
Schurter PC Board Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 865-7806
  • Mfr. Part No. 0034.4216
Each (In a Pack of 10)
MYR8.849
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
RS PRO Residential RCCBs, 25A, 2 Pole, 300mA, Type A, 230V
  • RS Stock No. 284-2368
Each
MYR351.70
ABB RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 181-4374
  • Mfr. Part No. 2CSA255103R1204 DS-ARC1 C20 A30
Each
MYR1,586.67
Littelfuse 3A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 876-8448
  • Mfr. Part No. KLDR003.TXP
Each
MYR200.86
1
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