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

90 of 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 150A, Breaking Capacity 65 kA, DIN Rail Mount
  • RS Stock No. 245-055
  • Mfr. Part No. NHGF36150U31XTW
Each
SGD3,362.79(exc. GST)
In Stock
Schurter PC Board Non Resettable Fuse, Radial 3.15A, 250V ac
  • RS Stock No. 284-5158
  • Mfr. Part No. 0034.6019
Each (In a Pack of 10)
SGD0.957(exc. GST)
In Stock
ETI 6A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-957
  • Mfr. Part No. 2211003
Each (In a Pack of 5)
SGD1.796(exc. GST)
Temporarily out of stock
ABB Emax 2, Tmax XT Power Supply Module for use with Circuit Breaker
  • RS Stock No. 231-9323
  • Mfr. Part No. 1SDA074173R1
Each
SGD419.18(exc. GST)
In Stock
Mersen 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6984
  • Mfr. Part No. S218194
Each (In a Pack of 10)
SGD2.346(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit, Canalis Series
  • RS Stock No. 211-0397
  • Mfr. Part No. KBC16DCB216
Each (In a Pack of 10)
SGD59.216(exc. GST)
In Stock
ABB F200 RCCB, 63A, 4 Pole, 500mA, Type A, 230/400V ac
  • RS Stock No. 177-5096
  • Mfr. Part No. 2CSF204201R4630 F204 A S-63/0,5
Each
SGD307.97(exc. GST)
In Stock
Better World
Siemens RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, SENTRON Range
  • RS Stock No. 187-3280
  • Mfr. Part No. 5SV1316-6KK06
Each
SGD102.89(exc. GST)
Temporarily out of stock
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 232-152
  • Mfr. Part No. 116897 NZM2-XHB-DA-NA
Each
SGD544.88(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9650
  • Mfr. Part No. 3VA11103GE420AA0
Each
SGD837.32(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 320A, Fixed Mount
  • RS Stock No. 260-8104
  • Mfr. Part No. C40F4TM320D
Each
SGD3,217.08(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 16A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2066
  • Mfr. Part No. M9F11216
Each
SGD150.28(exc. GST)
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0513
  • Mfr. Part No. KSB63SM48
Each
SGD414.85(exc. GST)
Temporarily out of stock
Better World
ABB, XT2S MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-6627
  • Mfr. Part No. 1SDA068169R1 XT2S 160 BLOC FF
Each
SGD518.14(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 MCB, 4P, 24A Curve C, 230V AC, 20 kA Breaking Capacity
  • RS Stock No. 273-2121
  • Mfr. Part No. A9C62425
Each
SGD1,470.66(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 2 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2720
  • Mfr. Part No. A9XPH212
Each
SGD78.99(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 10A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3565
  • Mfr. Part No. A9F55310
Each
SGD210.82(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Straight Busbar Trunking, 2m, 63A, KNA Series
  • RS Stock No. 219-8896
  • Mfr. Part No. KNA63ED4204
Each
SGD449.21(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1.6kA, Breaking Capacity 42 kA, Fixed Mount
  • RS Stock No. 345-330
  • Mfr. Part No. C160H35AFM
Each
SGD25,755.09(exc. GST)
In Stock
Schurter 2A M Glass Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7386
  • Mfr. Part No. 0034.2519
Each (In a Pack of 5)
SGD1.256(exc. GST)
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