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

49110 Products showing for Fuses & Circuit Breakers

16 of 999+
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 65 kA
  • RS Stock No. 209-7086
  • Mfr. Part No. 3VA5150-6EC31-0AA0
Each
SGD694.81(exc. GST)
ABB RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6974
  • Mfr. Part No. 2CSR275080R1324 DS201 M C32 AC30
Each
SGD170.58(exc. GST)
Siemens 800A Centred Tag Fuse, NH3, 690V
  • RS Stock No. 210-6968
  • Mfr. Part No. 3NE1438-0
Each (In a Pack of 3)
SGD403.403(exc. GST)
Better World
Schneider Electric Multi 9 C60BP MCB, 1P, 6A Curve D, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2438
  • Mfr. Part No. M9F43106
Each
SGD134.51(exc. GST)
Better World
Siemens RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 772-1192
  • Mfr. Part No. 5SU1356-7KK10
Each
SGD231.59(exc. GST)
Siemens 1.25kA Fuse Holder for 153mm Fuse, 1P, 1.25kV
  • RS Stock No. 608-664
  • Mfr. Part No. 3NH5463
1 Pack of 3
SGD181.21(exc. GST)
Better World
Schneider Electric, Compact MCCB 3P 25A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 178-7990
  • Mfr. Part No. LV426790
Each
SGD2,825.47(exc. GST)
Siemens 40A Tag Fuse, NH1, 400V ac
  • RS Stock No. 143-909
  • Mfr. Part No. 3NA6117-4
1 Pack of 3
SGD62.31(exc. GST)
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 63A Curve C, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3458
  • Mfr. Part No. A9F54463
Each
SGD300.42(exc. GST)
Schneider Electric Multi 9 MCB, 1P, 4A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9174
  • Mfr. Part No. M9U21104
Each
SGD258.12(exc. GST)
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 6A Curve B, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3247
  • Mfr. Part No. A9F53406
Each
SGD259.97(exc. GST)
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3344
  • Mfr. Part No. A9F54216
Each
SGD116.12(exc. GST)
Littelfuse 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4741
  • Mfr. Part No. 0215010.MXP
Each (In a Pack of 10)
SGD1.634(exc. GST)
Eaton 350A Centred Tag Fuse, NH1, 690V ac
  • RS Stock No. 182-1384
  • Mfr. Part No. 170M3818D
Each (In a Box of 6)
SGD310.175(exc. GST)
RS PRO 1.6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-457
Each (In a Pack of 10)
SGD0.483(exc. GST)
Schneider Electric Acti9 1 Phase Distribution Board, 16 Way, 125 A
  • RS Stock No. 244-931
  • Mfr. Part No. SE125A16
Each
SGD351.77(exc. GST)
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB 2 Pole 80V dc Voltage Rating, 6A
  • RS Stock No. 212-8793
  • Mfr. Part No. 2800874
Each
SGD151.49(exc. GST)
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 63A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 231-334
  • Mfr. Part No. 113023 NZMB2-A63-KCU-NA
Each
SGD870.25(exc. GST)
Better World
ABB, XT3S MCCB 3P 250A, Breaking Capacity 42.5 kA, Fixed Mount
  • RS Stock No. 236-6664
  • Mfr. Part No. 1SDA068271R1 XT3S 250 TMG 250A FF
Each
SGD1,531.33(exc. GST)
Siemens, SENTRON MCCB 3P 1A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-585
  • Mfr. Part No. 3VA5181-1MH31-0AA0
Each
SGD671.14(exc. GST)
1
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