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

78 of 999+
In Stock
Littelfuse 2.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3502
  • Mfr. Part No. 021902.5MXAP
Each (In a Pack of 10)
SGD1.191(exc. GST)
In Stock
ABB Undervoltage Release Circuit Trip, System Pro M Compact Range
  • RS Stock No. 539-0112
  • Mfr. Part No. 2CSS200911R0005 S2C-UA 230 AC
Each
SGD153.29(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 622-0036
  • Mfr. Part No. 5SY4104-7
Each
SGD51.73(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7873
  • Mfr. Part No. 2CDS252001R0401 S202-D40
Each
SGD94.53(exc. GST)
In Stock
Phoenix Contact Busbar
  • RS Stock No. 290-1258
  • Mfr. Part No. 0402174
Each
SGD49.22(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 4A Curve C, 240V AC, 72V DC, 50 kA Breaking Capacity
  • RS Stock No. 776-3449
  • Mfr. Part No. A9F74104
Each
SGD49.00(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, PowerLogic, 250A, Energy Sensor, 3.7W, Wireless
  • RS Stock No. 201-1454
  • Mfr. Part No. LV434020
Each
SGD1,087.73(exc. GST)
Temporarily out of stock
Siemens 32A Fuse Holder for 10 x 38mm Fuse, 3P, 690V ac
  • RS Stock No. 269-8376
  • Mfr. Part No. 3NW7033-1
Each
SGD96.80(exc. GST)
In Stock
RS PRO MCB, 2P, 1A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0178
Each
SGD37.03(exc. GST)
In Stock
Littelfuse 3.15A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 894-9593
  • Mfr. Part No. 04773.15MXP
Each (In a Pack of 5)
SGD2.72(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3405
  • Mfr. Part No. A9F54363
Each
SGD304.63(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 207-2727
  • Mfr. Part No. 2906764
Each
SGD177.04(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1.25A, 250V ac
  • RS Stock No. 226-0608
  • Mfr. Part No. 3721125000
Each (In a Pack of 10)
SGD0.954(exc. GST)
In Stock
Schneider Electric Multi9 M9F MCB Mini Circuit Breaker, 1P, 6A Curve D, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 654-531
  • Mfr. Part No. M9F12106
Each
SGD69.75(exc. GST)
In Stock
Eaton xEffect MCB, 2P, 10A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3241
  • Mfr. Part No. 278756 FAZ-C10/2
Each
SGD126.80(exc. GST)
In Stock
Eaton 20A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8718
  • Mfr. Part No. 20NHG000B-690
Each
SGD9.22(exc. GST)
In Stock
Better World
Schneider Electric Circuit Trip
  • RS Stock No. 219-9355
  • Mfr. Part No. LV429392
Each
SGD212.03(exc. GST)
Temporarily out of stock
ABB Tmax XT Motor Operator for use with MCCB
  • RS Stock No. 232-0190
  • Mfr. Part No. 1SDA066466R1 MOE XT2-XT4 220...250VAC/D
Each
SGD1,236.12(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 25A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7813
  • Mfr. Part No. 2CDS254001R0254 S204-C25
Each
SGD238.03(exc. GST)
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-387
  • Mfr. Part No. KV 1518 M
Each
SGD183.85(exc. GST)
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