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

128 / 999+
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 210-1749
  • Mfr. Part No. 3VA5160-6ED31-0AA0
Each
MYR1,944.42
Schneider Electric Acti9 3 Phase Distribution Board, 8 Way, 250 A
  • RS Stock No. 339-831
  • Mfr. Part No. SEA9BPN8
Each
MYR5,217.79
Better World
Schneider Electric Industrial Surge Protection, 2.5kA, DIN Rail Mount
  • RS Stock No. 247-1956
  • Mfr. Part No. A9L08600
Each
MYR3,616.77
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 800A, Fixed Mount
  • RS Stock No. 232-0129
  • Mfr. Part No. 1SDA060214R1 T6N800 FF TMA 800A
Each
MYR14,474.69
Mersen 50A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7498
  • Mfr. Part No. R214122
Each (In a Pack of 10)
MYR33.547
Siemens 10A Diazed Fuse, gG, 690/600V ac/dc
  • RS Stock No. 167-688
  • Mfr. Part No. 5SD8010
1 Pack of 5
MYR571.65
Eaton xEffect MCB, 2P, 63A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3415
  • Mfr. Part No. 278766 FAZ-C63/2
Each
MYR458.52
ABB S203 Circuit Breaker, 3+N, 25A Curve C, 440V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 287-6358
  • Mfr. Part No. 2CDS253103R0254
Each
MYR1,002.49
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0933
  • Mfr. Part No. 3WA9111-0EK52
1 Set
MYR1,950.79
ABB S803S MCB, 3P, 32A, KM, 690V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-563
  • Mfr. Part No. 2CCS863001R0536
Each
MYR1,599.02
WAGO Electronic Circuit Breaker 8A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 279-4126
  • Mfr. Part No. 787-2861/108-020
Each
MYR436.01
Littelfuse 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4713
  • Mfr. Part No. 021506.3MXP
Each (In a Pack of 10)
MYR4.684
ABB System Pro M Compact SU200M MCB, 3P, 10A Curve K, 400V AC, 400V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9760
  • Mfr. Part No. 2CDS273337R0427 SU203M-K10
1 Box of 1
MYR987.19
Eaton xEffect MCB, 2P, 6A Curve S, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 532-7647
  • Mfr. Part No. 278809 FAZ-S6/2
Each
MYR426.72
Siemens SENTRON 3VA9 Cover for use with 3VA1 100/160
  • RS Stock No. 218-1778
  • Mfr. Part No. 3VA9111-0WD40
Each
MYR178.49
WJ Furse Polypropylene Lightning Earth Clip Max. Conductor Size 25 x 3mm 152.4mm
  • RS Stock No. 124-2488
  • Mfr. Part No. 7TCA083550R0027 CP025
Each (In a Pack of 50)
MYR5.698
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0934
  • Mfr. Part No. 3WA9111-0EK53
1 Set
MYR1,950.79
RS PRO 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9737
Each (In a Pack of 10)
MYR1.949
Better World
ABB System Pro M Compact S200 MCB, 1P, 10A Curve K, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 514-0131
  • Mfr. Part No. 2CDS251001R0427 S201-K10
Each
MYR110.26
Better World
Schneider Electric iID RCD, 40A, 100mA
  • RS Stock No. 776-3701
  • Mfr. Part No. A9R12440
Each
MYR449.47
1
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