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

113 of 999+
In Stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 18.5 kA, Fixed Mount
  • RS Stock No. 259-416
  • Mfr. Part No. 281230 NZMB1-A160
Each
SGD1,262.56(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX400/630 Circuit Breakers
  • RS Stock No. 260-8074
  • Mfr. Part No. C4036E400
Each
SGD4,224.80(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 63A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2364
  • Mfr. Part No. M9F22163
Each
SGD62.10(exc. GST)
In Stock
ABB SMISSLINE TP S400M MCB, 3P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 177-046
  • Mfr. Part No. 2CCS573001R0324 S403M-C32
Each
SGD224.22(exc. GST)
In Stock
Eaton 1A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8201
  • Mfr. Part No. PV-1A10F
Each
SGD17.39(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 1P, 32A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-6943
  • Mfr. Part No. 2CDS251001R0325 - S201B32
Each
SGD32.48(exc. GST)
In Stock
Legrand 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6116
  • Mfr. Part No. 0 133 06
Each (In a Box of 10)
SGD5.366(exc. GST)
In Stock
ABB Tmax XT Cover for use with Rotary Handle
  • RS Stock No. 232-0194
  • Mfr. Part No. 1SDA066587R1 RHEIP54 XT1..4 PROTECT IP5
Each
SGD105.45(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 1P, 4A, Type A, 10 kA Breaking Capacity
  • RS Stock No. 202-7061
  • Mfr. Part No. 5SY4104-5
Each
SGD93.50(exc. GST)
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5340
  • Mfr. Part No. A1062715 / CUS103
Each
SGD51.35(exc. GST)
Temporarily out of stock
Eaton 5A T Melamine Cartridge Fuse, 0.41 x 1.5in
  • RS Stock No. 261-726
  • Mfr. Part No. FNQ-R-5
1 Pack of 10
SGD1,019.34(exc. GST)
In Stock
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8815
  • Mfr. Part No. 5SV1316-4KK16
Each
SGD317.34(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 20A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9129
  • Mfr. Part No. M9F22220
Each
SGD274.00(exc. GST)
In Stock
Eaton Nickel Plated Copper Fuse Clip for 1in Cartridge Fuse
  • RS Stock No. 703-4192
  • Mfr. Part No. A3354705
Each
SGD15.83(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 500A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1696
  • Mfr. Part No. 3VA1450-5EF32-0AA0
Each
SGD2,406.46(exc. GST)
In Stock
Better World
Schneider Electric Compact Nsx Plug In Kit for use with Compact Nsx 400/630
  • RS Stock No. 221-1252
  • Mfr. Part No. LV432539
Each
SGD1,567.99(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, 440V ac, DIN Rail Mount
  • RS Stock No. 265-7529
  • Mfr. Part No. 2906450
Each
SGD164.87(exc. GST)
In Stock
Better World
ABB SN201 MCB, 2P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 231-9975
  • Mfr. Part No. 2CSS255101R0164 SN201-C16 -
Each
SGD63.04(exc. GST)
In Stock
ETI 4A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-941
  • Mfr. Part No. 2211002
Each (In a Pack of 5)
SGD1.80(exc. GST)
In Stock
Eaton 160A Rail Mount Fuse Holder for NH00 Fuse, 3P, 690V ac
  • RS Stock No. 181-8500
  • Mfr. Part No. TD00-IP20
Each
SGD30.13(exc. GST)
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