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

50989 Products showing for Fuses & Circuit Breakers

2 of 999+
RS PRO MCB, 1P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0197
Each
€10.28(exc. VAT)
Eaton BB-EV 1 Phase Busbar, 1000V, 17.8mm Pitch
  • RS Stock No. 244-227
  • Mfr. Part No. 168826 BB-EVF-10/1P-1MU
Each
€25.30(exc. VAT)
RS PRO PC Board Non Resettable Fuse, Radial 4A, 250V
  • RS Stock No. 767-5162
Each (In a Pack of 10)
€0.279(exc. VAT)
ETA Thermal Circuit Breaker - 1658, 25A Current Rating
  • RS Stock No. 288-4022
  • Mfr. Part No. 1658-G21-02-P10-25A
Each
€6.25(exc. VAT)
TE Connectivity Thermal Circuit Breaker - W31 Single Pole 50 V dc, 240V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 782-0937
  • Mfr. Part No. W31-X2M1G-20
Each
€41.53(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 40A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3354
  • Mfr. Part No. A9F54240
Each
€65.50(exc. VAT)
Eaton 13A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-605
  • Mfr. Part No. TDC180-13A
Each (In a Pack of 10)
€0.636(exc. VAT)
RS PRO 30A Rail Mount Fuse Holder for 5 x 20mm Fuse, 1P, 500V
  • RS Stock No. 242-0497
1 Bag of 10
€36.50(exc. VAT)
Schneider Electric TeSys Deca Auxiliary Contact for use with GV2 And GV3
  • RS Stock No. 212-239
  • Mfr. Part No. GVAE1TQ
Each
€10.35(exc. VAT)
ABB 12 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS Stock No. 183-3758
  • Mfr. Part No. 1SLM006500A2212
Each
€42.02(exc. VAT)
RS PRO HBC, LBC Fuse Kit
  • RS Stock No. 420-252
1 Kit
€70.56(exc. VAT)
Phoenix Contact Busbar
  • RS Stock No. 290-1258
  • Mfr. Part No. 0402174
Each
€12.37(exc. VAT)
RS PRO 10A Inline Fuse Holder for 5x20mm Fuse, 250V
  • RS Stock No. 237-5259
Each
€2.62(exc. VAT)
Contactum RCBO, 20A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type B, CCPBR Range
  • RS Stock No. 240-6385
  • Mfr. Part No. CCPBR0620AB
Each
€28.44(exc. VAT)
RS PRO Earthing Strap Metal 12 → 32mm Diameter
  • RS Stock No. 390-2448
1 Pack of 10
€20.85(exc. VAT)
HENSEL 1, 3 Phase Distribution Board, 18 Way, 63 A
  • RS Stock No. 183-2859
  • Mfr. Part No. KV9118M
Each
€164.53(exc. VAT)
Eaton 30A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4399
  • Mfr. Part No. LP-CC-30
Each
€62.58(exc. VAT)
ABB Tmax XT Handle, Lockable for use with Circuit Breaker
  • RS Stock No. 231-9359
  • Mfr. Part No. 1SDA104843R1 RHE XT5 F/P
Each
€177.51(exc. VAT)
ETI 20A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-670
  • Mfr. Part No. 2312406
Each (In a Pack of 5)
€1.364(exc. VAT)
Schneider Electric Acti 9 Acti9 iDT40K XA MCB, 3+N, 20A Curve C, 230V AC
  • RS Stock No. 238-3450
  • Mfr. Part No. A9PK1720
Each
€104.59(exc. VAT)
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