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

80 of 999+
Temporarily out of stock
Siemens SENTRON Busbar
  • RS Stock No. 203-3234
  • Mfr. Part No. 8US1921-2BA01
Each (In a Pack of 15)
SGD5.451(exc. GST)
Temporarily out of stock
Siemens SENTRON Busbar, 600V
  • RS Stock No. 266-598
  • Mfr. Part No. 8US1213-4AH00
Each
SGD649.58(exc. GST)
Temporarily out of stock
Eaton EVG 1 Phase Busbar, 415V
  • RS Stock No. 256-649
  • Mfr. Part No. 291480 EVG-16/1PHAS/6MODUL/HI
Each
SGD12.07(exc. GST)
In Stock
WJ Furse Lightning Earth Inspection Pit W. 300mm x 300mm H. 158mm 5000kg
  • RS Stock No. 124-2510
  • Mfr. Part No. 7TCA083320R0011 PT205
Each
SGD109.94(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 10A, Type Z, 15 kA Breaking Capacity
  • RS Stock No. 219-9242
  • Mfr. Part No. A9F92210
Each
SGD642.11(exc. GST)
In Stock
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, System Pro M Compact Range
  • RS Stock No. 201-6953
  • Mfr. Part No. 2CSR255180R1164 DS201 C16 A30
Each
SGD228.76(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, NSX Range MCCB 4P 100A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 849-4135
  • Mfr. Part No. LV429800
Each
SGD1,250.82(exc. GST)
In Stock
Siemens SENTRON 4 Phase Busbar, 18mm Pitch
  • RS Stock No. 124-3127
  • Mfr. Part No. 5ST3716
Each
SGD133.37(exc. GST)
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 236-6764
  • Mfr. Part No. 1SDA068476R1 XT4S 160 Ekip I 40A FF
Each
SGD1,194.52(exc. GST)
Temporarily out of stock
Better World
ABB, XT4S MCCB 3P 40A, Fixed Mount
  • RS Stock No. 236-6761
  • Mfr. Part No. 1SDA068471R1 XT4S 160 Ekip LS/I 40A FF
Each
SGD1,257.53(exc. GST)
Temporarily out of stock
Better World
ABB, XT4S MCCB 3P 40A, Fixed Mount
  • RS Stock No. 236-6768
  • Mfr. Part No. 1SDA068481R1 XT4S 160 Ekip LSI 40A FF
Each
SGD2,235.77(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 3A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3430
  • Mfr. Part No. A9F74103
Each
SGD56.53(exc. GST)
In Stock
Siemens SENTRON 3 Phase Busbar, 17.8mm Pitch
  • RS Stock No. 213-2563
  • Mfr. Part No. 5ST3644
Each (In a Pack of 10)
SGD21.814(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 3P, 32A Curve C, 440V AC, 12V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4318
  • Mfr. Part No. 2CDS273001R0324 S203M-C32
Each
SGD146.81(exc. GST)
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 116-989
  • Mfr. Part No. KV 8236 M
Each
SGD251.83(exc. GST)
In Stock
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8953
  • Mfr. Part No. R9H13404
Each
SGD173.03(exc. GST)
Temporarily out of stock
Better World
Schneider Electric 690 V ac, 750V dc Circuit Trip for use with Compact NSX 100/160 Circuit Breakers
  • RS Stock No. 212-0237
  • Mfr. Part No. LV429164
Each
SGD247.35(exc. GST)
In Stock
ABB Emax 2, Tmax XT Electronic Time Delay for use with MCCB
  • RS Stock No. 232-0082
  • Mfr. Part No. 1SDA038320R1 UVD 220-250VAC/DC T7-X-E
Each
SGD957.35(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Acti 9 C120N MCB, 2P, 80A Curve C, 440V AC, 250V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3054
  • Mfr. Part No. A9N18361
Each
SGD559.27(exc. GST)
Temporarily out of stock
ABB High Performance S800N MCB, 2P, 63A Curve D, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 435-257
  • Mfr. Part No. 2CCS892001R0631 S802N-D63
Each
SGD278.78(exc. GST)
1
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