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

10 of 999+
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 232-0250
  • Mfr. Part No. 1SDA067397R1 XT1C 160 TMD 100A FF
Each
SGD375.70(exc. GST)
Better World
Schneider Electric 32A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 219-9058
  • Mfr. Part No. DF2CN32
Each (In a Pack of 10)
SGD13.708(exc. GST)
Schurter PC Board Non Resettable Fuse, Radial 250mA, 250V ac
  • RS Stock No. 284-5041
  • Mfr. Part No. 0034.6008
Each (In a Pack of 10)
SGD0.892(exc. GST)
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
SGD65.16(exc. GST)
Siemens 63A Bottle Fuse Holder, 3P, 400V ac
  • RS Stock No. 202-7076
  • Mfr. Part No. 5SG6206
Each (In a Pack of 4)
SGD50.74(exc. GST)
Littelfuse SMD Non Resettable Fuse 2A, 125V ac/dc
  • RS Stock No. 219-6103P
  • Mfr. Part No. 0154002.DR
Each (Supplied on a Reel)
SGD1.548(exc. GST)
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-7280
  • Mfr. Part No. 1SDA067409R1 XT1C 160 TMD 125A FF
Each
SGD780.11(exc. GST)
Eaton xPole MCB, 2P, 20A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4361
  • Mfr. Part No. 242406 PLSM-C20/2-MW
Each
SGD92.08(exc. GST)
Eaton RCCB, 40A, 4 Pole, 100mA, Type A, 230/400V ac
  • RS Stock No. 922-8673
  • Mfr. Part No. 235440 PFIM-40/4/01-A-MW
Each
SGD211.97(exc. GST)
SIBA 20A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3399
  • Mfr. Part No. 70-059-60/20A
Each (In a Pack of 10)
SGD1.017(exc. GST)
ABB 220 → 240 V ac, 220 → 250V dc Shunt Trip Shunt trip for use with Tmax XT1, Tmax XT2, Tmax XT3, Tmax
  • RS Stock No. 831-9197
  • Mfr. Part No. 1SDA066325R1
Each
SGD172.64(exc. GST)
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 20A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9135
  • Mfr. Part No. A9F77220
Each
SGD98.87(exc. GST)
Better World
Schneider Electric Surge Protector, 24 → 250V dc, Clip-On Mount
  • RS Stock No. 817-5323
  • Mfr. Part No. LAD4DDL
Each
SGD51.21(exc. GST)
Better World
Schneider Electric Multi 9 MCB, 1P, 15A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9153
  • Mfr. Part No. M9F42115
Each
SGD194.99(exc. GST)
Eaton 20A F Melamine Cartridge Fuse, 14 x 38mm
  • RS Stock No. 848-4096
  • Mfr. Part No. JJS-20
Each
SGD126.97(exc. GST)
ABB High Performance S800C MCB, 4P, 63A Curve C, 400 V, 415 V AC, 25 kA Breaking Capacity
  • RS Stock No. 231-9582
  • Mfr. Part No. 2CCS884001R0634 S804C C 63A - 25 KA
Each
SGD404.94(exc. GST)
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)
Littelfuse 10A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3120
  • Mfr. Part No. 0217010.MXP
Each (In a Pack of 10)
SGD0.526(exc. GST)
Schurter PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 284-5300
  • Mfr. Part No. 0034.6612
Each (In a Pack of 10)
SGD0.89(exc. GST)
Eaton PKE32 Electronic Circuit Breaker 36A PKE, 3 channels , Fixed
  • RS Stock No. 120-302
  • Mfr. Part No. 168972 PKE32/XTUCP-36
Each
SGD309.50(exc. GST)
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