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

2453 of 999+
Siemens Alpha Assembly Kit for use with Unequipped Distribution Boards
  • RS Stock No. 212-9053
  • Mfr. Part No. 8GK4102-8KK22
Each
SGD760.99(exc. GST)
Eaton NZM Jumper Link for use with N3-4-...-S1(-S15)-DC
  • RS Stock No. 120-238
  • Mfr. Part No. 168589 NZM3-4-XKV2POU
Each
SGD777.22(exc. GST)
Littelfuse 0.14A Resettable Fuse, 60V dc
  • RS Stock No. 787-4277
  • Mfr. Part No. 1812L014DR
Each (In a Pack of 10)
SGD0.64(exc. GST)
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-620
  • Mfr. Part No. 3VA5195-5EC31-0AA0
Each
SGD440.75(exc. GST)
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0786
  • Mfr. Part No. 3WA9111-0AN21
Each
SGD181.46(exc. GST)
Bourns Non Resettable Fuse 1A, 125V ac
  • RS Stock No. 191-4193
  • Mfr. Part No. SF-2410HI100T-2
Each (On a Reel of 1000)
SGD0.933(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 3 channels
  • RS Stock No. 156-827
  • Mfr. Part No. 3VA2216-5HM32-0AA0
Each
SGD1,895.13(exc. GST)
Eaton RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, Type C, FRBdM Range
  • RS Stock No. 120-977
  • Mfr. Part No. 168201 FRBDM-C6/2/003-G/A
Each
SGD361.40(exc. GST)
Eaton RCBO, 20A Current Rating, 3+N Poles, 100mA Trip Sensitivity, Type D, xPole Range
  • RS Stock No. 229-306
  • Mfr. Part No. 120684 mRB4-20/3N/D/01-A
Each
SGD710.79(exc. GST)
ABB S800U MCB, 1P, 25A Curve K, 240V AC, 30 kA Breaking Capacity
  • RS Stock No. 140-441
  • Mfr. Part No. 2CCS881017R0517
Each
SGD186.86(exc. GST)
Legrand DX Range DX3 MCB, 3A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9550
  • Mfr. Part No. 4 077 08
Each
SGD203.58(exc. GST)
Siemens SENTRON Cover Frame for use with 3VA10/11, 3VA9114-0RL10, 3VA9114-0RL20
  • RS Stock No. 161-935
  • Mfr. Part No. 3VA9054-0SB10
Each
SGD55.73(exc. GST)
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA , Fixed
  • RS Stock No. 127-709
  • Mfr. Part No. 183340 IZMX16H3-V16F-1
Each
SGD14,267.84(exc. GST)
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4553
  • Mfr. Part No. 3VA2125-7HL36-0AA0
Each
SGD1,215.45(exc. GST)
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 25A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7498
  • Mfr. Part No. 5SL4625-6
Each
SGD228.95(exc. GST)
Siemens, SENTRON MCCB 2P 350A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-222
  • Mfr. Part No. 3VA5335-7EC61-0AA0
Each
SGD3,300.42(exc. GST)
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-122
  • Mfr. Part No. 3VA2140-5KQ36-0AA0
Each
SGD2,065.10(exc. GST)
ABB S800S MCB, 4P, 10A Curve C, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-714
  • Mfr. Part No. 2CCS864001R0104
Each
SGD650.93(exc. GST)
Better World
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-3055
  • Mfr. Part No. 1SDA070910R1
Each
SGD15,261.66(exc. GST)
Schurter PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 284-5546
  • Mfr. Part No. 7100.1068.13
Each (In a Pack of 10)
SGD1.921(exc. GST)
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