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

106 of 999+
In Stock
Eaton 35A Centred Tag Fuse, NH000, 690V ac
  • RS Stock No. 703-8787P
  • Mfr. Part No. 35NHG000B-690
Each (Supplied in a Bag)
SGD10.68(exc. GST)
In Stock
Schneider Electric Acti 9 MCB, 3P, 2.5A Curve K
  • RS Stock No. 247-1715
  • Mfr. Part No. 21106
Each
SGD290.52(exc. GST)
In Stock
Eaton 630A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 182-1693
  • Mfr. Part No. 170M5812D
Each
SGD565.26(exc. GST)
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 116-990
  • Mfr. Part No. KV 9224
Each
SGD230.76(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4829
  • Mfr. Part No. 3VA2563-7JP42-0AA0
Each
SGD6,056.26(exc. GST)
In Stock
Schurter 16A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 737-8237
  • Mfr. Part No. 3101.0040
Each (In a Bag of 5)
SGD5.614(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 30A Current Rating
  • RS Stock No. 782-0918
  • Mfr. Part No. W58-XB1A4A-30
Each
SGD16.40(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 63A, Fixed Mount
  • RS Stock No. 254-6322
  • Mfr. Part No. C11N3TM063L
Each
SGD778.35(exc. GST)
Temporarily out of stock
Eaton RCCB, 40A, 4 Pole, 100mA, Type G, 230 V ac, 400 V ac
  • RS Stock No. 227-0729
  • Mfr. Part No. 264997 PFGM-40/4/01-G
Each
SGD492.44(exc. GST)
Temporarily out of stock
Better World
Schneider Electric RCBO, 6A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 201-2250
  • Mfr. Part No. A9DG3606
Each
SGD594.07(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 350A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-377
  • Mfr. Part No. 3VA5335-5GF41-2AA0
Each
SGD4,421.31(exc. GST)
Temporarily out of stock
Legrand DX3 Circuit Breaker, 3P, 6A Curve B, 400V AC, 16 kA Breaking Capacity
  • RS Stock No. 266-1337
  • Mfr. Part No. 409005
Each
SGD505.57(exc. GST)
Temporarily out of stock
Schneider Electric A9Z RCCB, 40A, 4 Pole, 100mA, Type A-SI, 380-415V ac
  • RS Stock No. 211-967
  • Mfr. Part No. A9Z32440
Each
SGD343.48(exc. GST)
In Stock
RS PRO MCB, 1P, 6A Curve B, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0164
Each
SGD13.18(exc. GST)
In Stock
Eaton 125A Centred Tag Fuse, NH02, 500V ac
  • RS Stock No. 703-8737P
  • Mfr. Part No. 125NHG02B
Each (Supplied in a Box)
SGD18.02(exc. GST)
Temporarily out of stock
Siemens Surge Protector, Through Hole Mount
  • RS Stock No. 203-3893
  • Mfr. Part No. 3TX7402-3T
Each
SGD24.81(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Multi 9 C60BP MCB, 3P, 25A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2429
  • Mfr. Part No. M9F42325
Each
SGD433.31(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 25A Curve D
  • RS Stock No. 231-9726
  • Mfr. Part No. 2CDS272001R0251 S202M D 25A - 15 KA
1 Box of 1
SGD86.46(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-7935
  • Mfr. Part No. C25N32D250
Each
SGD3,234.18(exc. GST)
In Stock
Better World
Schneider Electric Busbar Feed Unit, Canalis KBA Series
  • RS Stock No. 211-0357
  • Mfr. Part No. KBA40ABG4W
Each
SGD97.18(exc. GST)
1
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