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

46578 Products showing for Fuses & Circuit Breakers

192 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-3751
  • Mfr. Part No. 3VA1340-4EF32-0AA0
Each
MYR6,112.70
Temporarily out of stock
Lovato ModuLo P1MB MCB, 2P, 6A Curve C, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5712
  • Mfr. Part No. P1MB2PC06
Each
MYR275.90
In Stock
Siemens Sentron Undervoltage Release for use with 3VA1 Series Circuit Breaker
  • RS Stock No. 874-4521
  • Mfr. Part No. 3VA9908-0BB11
Each
MYR1,041.46
Temporarily out of stock
Schurter SMD Non Resettable Fuse 100mA, 63V ac/dc
  • RS Stock No. 173-9675
  • Mfr. Part No. 3402.0004.11
Each (In a Bag of 100)
MYR3.633
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 63A Curve K, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-8043
  • Mfr. Part No. 2CDS253001R0607 S203-K63
Each
MYR856.83
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 10A Curve D, 10 kA Breaking Capacity
  • RS Stock No. 219-9166
  • Mfr. Part No. M9F43210
Each
MYR1,089.10
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 18 Way, 125 A
  • RS Stock No. 339-681
  • Mfr. Part No. SEA9APN148MS
Each
MYR1,596.19
In Stock
ABB SN201 MCB, 1+N, 25A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 186-3473
  • Mfr. Part No. 2CSS245102R0254
Each
MYR99.73
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 10A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3388
  • Mfr. Part No. A9F54310
Each
MYR846.13
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3073
  • Mfr. Part No. 1SDA070927R1
Each
MYR48,600.38
In Stock
Eaton xPole MCB, 3P, 50A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4412
  • Mfr. Part No. 242479 PLSM-C50/3-MW
Each
MYR584.43
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 2A Curve C, 440V AC, 12V DC, 20 kA Breaking Capacity
  • RS Stock No. 231-9685
  • Mfr. Part No. 2CDS254001R0024 S204 C 2A - 10 KA
1 Box of 1
MYR994.17
In Stock
Wickmann 0.75A Resettable Fuse, 72 V ac, 72V dc
  • RS Stock No. 174-0797
  • Mfr. Part No. RF2569-000
Each (In a Pack of 20)
MYR1.545
In Stock
ABB 220 → 240 V ac, 220 → 250V dc Shunt Trip Shunt trip for use with Tmax XT1, Tmax XT2, Tmax XT3, Tmax
  • RS Stock No. 831-9197
  • Mfr. Part No. 1SDA066325R1
Each
MYR402.32
In Stock
Eaton 200mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1745
Each (In a Pack of 10)
MYR2.076
Temporarily out of stock
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-636
  • Mfr. Part No. 3VA5195-6EC31-0AA0
Each
MYR2,359.59
In Stock
Schneider Electric RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A-SI, Acti9 Range
  • RS Stock No. 276-8719
  • Mfr. Part No. A9D27216
Each
MYR3,383.38
In Stock
Eaton 10A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7036
  • Mfr. Part No. MDA-10-R
Each
MYR32.13
Temporarily out of stock
QSA Rear Cover 1P, rear side
  • RS Stock No. 241-381
  • Mfr. Part No. 1319441 QSARCOVER1P160-400
Each
MYR421.51
In Stock
Schurter 5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7948
  • Mfr. Part No. 0001.1011
Each (In a Pack of 10)
MYR2.423
1
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