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

261 / 999+
Temporarily out of stock
Eaton 125A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1511
  • Mfr. Part No. XS125
Each (In a Box of 10)
MYR426.875
In Stock
Littelfuse 500mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4230
  • Mfr. Part No. 0218.500MXP
Each (In a Pack of 10)
MYR1.695
In Stock
Better World
Siemens SENTRON 5SY4 MCB, 3+N, 32A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6669
  • Mfr. Part No. 5SY4632-7
Each
MYR990.85
Temporarily out of stock
Siemens SENTRON 5SJ4211 MCB, 2P, 5A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-861
  • Mfr. Part No. 5SJ4211-7HG42
Each
MYR874.52
Temporarily out of stock
Eaton 32A Rail Mount Fuse Holder, 1P, 550V ac
  • RS Stock No. 182-1421
  • Mfr. Part No. 32NNSFBSWHITE
Each (In a Box of 10)
MYR119.826
In Stock
Lovato RCBO, 10A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C, P1 Range
  • RS Stock No. 277-5054
  • Mfr. Part No. P1RE1NC10AC300
Each
MYR576.95
In Stock
Eaton 160A Bolted Tag Fuse, A4, 350 V dc, 660V ac, 94mm
  • RS Stock No. 182-1777
  • Mfr. Part No. TFP160
Each
MYR441.00
Temporarily out of stock
Schneider Electric RCBO, 10A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-140
  • Mfr. Part No. A9D06810
Each
MYR1,056.01
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 20A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2314
  • Mfr. Part No. A9F07220
Each
MYR544.12
Temporarily out of stock
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-457
  • Mfr. Part No. 3VA5215-7EC31-2AA0
Each
MYR9,207.46
In Stock
Schurter 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 777-7473
  • Mfr. Part No. 0034.3117
Each (In a Pack of 10)
MYR1.847
In Stock
Bulgin 10A Inline Fuse Holder for 6.3 x 25mm Fuse, 250V ac
  • RS Stock No. 408-410
  • Mfr. Part No. FX0285
Each (In a Pack of 5)
MYR53.964
In Stock
Siemens Sentron 5SY Mounting Adapter for use with Miniature Circuit Breakers
  • RS Stock No. 187-5242
  • Mfr. Part No. 5ST3820-2
Each
MYR54.88
In Stock
Littelfuse 0.75A Resettable Fuse, 33V dc
  • RS Stock No. 787-4259P
  • Mfr. Part No. 1812L075/33DR
Each (Supplied on a Reel)
MYR2.277
In Stock
Siemens 35A NH Fuse, NH2, 440 - 500V ac/dc
  • RS Stock No. 269-8318
  • Mfr. Part No. 3NA7214
Each (In a Pack of 3)
MYR133.75
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1kA IZMX/INX, 3 channels , Withdrawable
  • RS Stock No. 132-641
  • Mfr. Part No. 183604 IZMX40H3-P10W-1
Each
MYR66,205.11
Temporarily out of stock
ABB Tmax XT Front Panel Kit for use with XT2, XT4
  • RS Stock No. 237-6124
  • Mfr. Part No. 1SDA066636R1 FLD XT2-XT4 W
Each
MYR415.29
In Stock
ABB, Pro M MCCB 1P 100A, DIN Rail Mount
  • RS Stock No. 538-3833
  • Mfr. Part No. 2CDE283001R0100 E203/100R
Each
MYR430.84
In Stock
Eaton xEffect MCB, 1P, 160mA Curve C
  • RS Stock No. 230-0924
  • Mfr. Part No. 177397 FAZ6-C0,16/1
Each
MYR160.28
Temporarily out of stock
Siemens SENTRON Connection Unit
  • RS Stock No. 277-0711
  • Mfr. Part No. 3WA9111-0AB04
Each
MYR434.19
1
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