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

284 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3908
  • Mfr. Part No. 3VA2063-8JQ46-0AA0
Each
MYR13,714.95
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 260-9481
  • Mfr. Part No. C10H4TM063
Each
MYR4,872.84
In Stock
Eaton 1A Black Blade Car Fuse, 32V dc
  • RS Stock No. 849-5611
  • Mfr. Part No. BK-ATC-1
Each
MYR5.34
In Stock
Better World
Schneider Electric Spreader for use with Compact Nsx 100/160/250, Easypact Cvs 100/160/250
  • RS Stock No. 221-1225
  • Mfr. Part No. LV431564
Each
MYR364.67
Temporarily out of stock
Eaton 63A Bolted Tag Fuse, 460 V dc, 660V ac, 111mm
  • RS Stock No. 182-1502
  • Mfr. Part No. TBC63
Each (In a Box of 20)
MYR216.519
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-3449
  • Mfr. Part No. 1SDA071391R1
Each
MYR33,193.80
Temporarily out of stock
Better World
Schneider Electric
  • RS Stock No. 125-1382
  • Mfr. Part No. A9C70114
Each
MYR1,786.32
Temporarily out of stock
ABB, Parts MCCB 4P 0A
  • RS Stock No. 236-6843
  • Mfr. Part No. 1SDA068642R1
Each
MYR177.24
In Stock
Eaton 20A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 849-5692
  • Mfr. Part No. SC-20
Each
MYR100.73
In Stock
Phoenix Contact CLIPLINE Thermal Circuit Breaker - UT 6-TMC Single Pole 250V Voltage Rating DIN Rail Mount, 1A Current
  • RS Stock No. 684-3585
  • Mfr. Part No. 0916604
Each
MYR97.53
Temporarily out of stock
Eaton 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 169-9385
  • Mfr. Part No. HTC-50M
1 Bag of 1000
MYR17,592.64
Temporarily out of stock
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 5A Current Rating
  • RS Stock No. 210-2099
  • Mfr. Part No. 3120-N551-H7T1-W14DR4-5A
Each
MYR180.75
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-3593
  • Mfr. Part No. 1SDA071570R1
Each
MYR63,468.74
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-808
  • Mfr. Part No. 3VA2225-8HM32-0AA0
Each
MYR12,715.72
In Stock
Schneider Electric R9PR RCCB, 63A, 4 Pole, 30mA, Type AC, 400V
  • RS Stock No. 276-8976
  • Mfr. Part No. R9PRC463
Each
MYR1,754.15
In Stock
Better World
Schneider Electric Shunt trip for use with Multi 9 C60 C60BP, Multi 9 C60 C60BPR, Multi 9 C60 C60SP, Multi 9 C60H-DC,
  • RS Stock No. 220-1341
  • Mfr. Part No. M9A26946
Each
MYR652.23
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
  • RS Stock No. 155-864
  • Mfr. Part No. 3VA2440-7KQ32-0AA0
Each
MYR23,909.91
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 32A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7474
  • Mfr. Part No. 5SL4432-6
Each
MYR810.94
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3521
  • Mfr. Part No. A9F55216
Each
MYR419.73
In Stock
RS PRO 15A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V
  • RS Stock No. 237-5266
Each
MYR17.88
1
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