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

38 of 999+
Temporarily out of stock
Eaton CU Busbar
  • RS Stock No. 230-4430
  • Mfr. Part No. 044092 CU20X5
Each (In a Pack of 10)
SGD125.654(exc. GST)
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 1P, 4A Curve B, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 203-2269
  • Mfr. Part No. 5SY6104-6
Each
SGD33.59(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3+N, 6A Curve K, 415V AC, 100 kA Breaking Capacity
  • RS Stock No. 203-796
  • Mfr. Part No. 2CDS383103R0377
Each
SGD434.49(exc. GST)
In Stock
SIBA 400A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 421-823
  • Mfr. Part No. 20-004-13/400A
Each
SGD42.45(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 40A, Fixed Mount
  • RS Stock No. 254-6282
  • Mfr. Part No. C10F32D040
Each
SGD1,235.18(exc. GST)
In Stock
SIBA 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3220
  • Mfr. Part No. 70-007-33/1A
Each (In a Pack of 10)
SGD0.91(exc. GST)
In Stock
Eaton RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, PXK Range
  • RS Stock No. 183-3546
  • Mfr. Part No. 236965 PXK-C20/1N/003-A
Each
SGD82.07(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 32A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7879
  • Mfr. Part No. 2CDS252001R0321 S202-D32
Each
SGD73.05(exc. GST)
In Stock
RS PRO 30A Rail Mount Fuse Holder for 5 x 20mm Fuse, 1P, 500V
  • RS Stock No. 242-0501
1 Bag of 10
SGD264.77(exc. GST)
In Stock
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 191-6074
  • Mfr. Part No. A9DA2616
Each
SGD419.85(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 6A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2373
  • Mfr. Part No. M9F22306
Each
SGD215.51(exc. GST)
Temporarily out of stock
ABB, XT1H MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-7286
  • Mfr. Part No. 1SDA067458R1 XT1H 160 TMD 63A FF
Each
SGD675.34(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 6A Curve C, 250V DC
  • RS Stock No. 772-1502
  • Mfr. Part No. A9N61506
Each
SGD44.23(exc. GST)
Last RS stock
Schneider Electric, Compact MCCB 3P 125A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 178-8153
  • Mfr. Part No. LV426258
Each
SGD279.54(exc. GST)
Temporarily out of stock
Eaton RCCB, 25A, 4 Pole, 100mA, Type S, 230 V ac, 400 V ac
  • RS Stock No. 227-0703
  • Mfr. Part No. 264298 PFGM-25/4/01-S
Each
SGD525.59(exc. GST)
In Stock
RS PRO HBC Fuse Kit
  • RS Stock No. 611-8983
Each
SGD259.55(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 125A Curve C, 440V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 219-8297
  • Mfr. Part No. A9N18459
Each
SGD574.40(exc. GST)
In Stock
Schneider Electric 600A Neutral Link for BS Fuses, 8.5mm x 47mm
  • RS Stock No. 417-313
  • Mfr. Part No. NL630
Each
SGD107.30(exc. GST)
In Stock
RS PRO Residential RCCBs, 63A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 284-2375
Each
SGD161.80(exc. GST)
In Stock
Littelfuse 150A Orange Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4394P
  • Mfr. Part No. 0298150.ZXEH
Each (Supplied in a Bag)
SGD10.07(exc. GST)
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