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

46578 Products showing for Fuses & Circuit Breakers

248 / 999+
Eaton xEffect MCB, 1P, 16A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6905
  • Mfr. Part No. 102090 FAZ-C16/1-NA
Each
MYR199.43
ABB System Pro M Compact SU200M MCB, 1P, 10A Curve C, 277V AC, 277V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9710
  • Mfr. Part No. 2CDS271337R0104 SU201M-C10
1 Box of 1
MYR258.29
ABB 3 Phase Busbar Cover, 690V
  • RS Stock No. 231-8933
  • Mfr. Part No. 1SAM201906R1113 PS1-3-1-65
1 Box of 1
MYR94.49
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-311
  • Mfr. Part No. KV PC 9336
Each
MYR1,336.20
RS PRO 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 277-3914
Each (In a Bag of 1000)
MYR7.484
Better World
Schneider Electric Busbar End Feed Unit, Canalis Series
  • RS Stock No. 248-4073
  • Mfr. Part No. KNA63AB4
Each
MYR813.25
ABB SMISSLINE TP S400M MCB, 1P, 4A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 176-352
  • Mfr. Part No. 2CCS571001R0044 S401M-C4
Each
MYR245.83
Better World
Schneider Electric Surge Arrester, 40kA, 800V ac, DIN Rail Mount
  • RS Stock No. 219-8275
  • Mfr. Part No. A9L40271
Each
MYR1,519.24
Hager BF RCCB, 63A, 2P Pole, 300mA, Type A
  • RS Stock No. 602-186
  • Mfr. Part No. BF263
Each
MYR2,472.71
RS PRO 10A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8029
Each (In a Box of 500)
MYR2.142
Hager NEN MCB, 2P, 25A Curve B, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4965
  • Mfr. Part No. NEN225
Each
MYR718.27
Better World
Siemens SENTRON 5SY4 MCB, 2P, 8A Curve D, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-6590
  • Mfr. Part No. 5SY4208-8
Each
MYR522.62
RS PRO PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 611-0383
Each (In a Pack of 10)
MYR4.803
Better World
Schneider Electric Acti 9 iC60N MCB, 40A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 776-3537
  • Mfr. Part No. A9F77640
Each
MYR693.47
Mersen 4A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-880
  • Mfr. Part No. S090521Q
1 Box of 10
MYR27.33
RS PRO 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9686
Each (In a Pack of 10)
MYR1.949
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 20A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6529
  • Mfr. Part No. 5SL4520-8
Each
MYR356.04
Eaton 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3838
  • Mfr. Part No. GDC-5A
Each
MYR37.68
ABB, XT2N MCCB 4P 63A, Fixed Mount
  • RS Stock No. 237-6239
  • Mfr. Part No. 1SDA067098R1 XT2N 160 Ekip I 63A FF
Each
MYR4,690.54
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2356
  • Mfr. Part No. 2CCF800267R0001
Each
MYR144.03
1
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