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

46578 Products showing for Fuses & Circuit Breakers

2312 / 999+
Better World
Siemens SENTRON 5SV6016 Fire Safety Circuit Breaker, 2P, 40A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 187-5260
  • Mfr. Part No. 5SV6016-6KK40
Each
MYR1,173.55
Siemens, SENTRON MCCB 4P 1.25kA, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4882
  • Mfr. Part No. 3VA2612-5KQ42-0AA0
Each
MYR39,089.16
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-3595
  • Mfr. Part No. 1SDA071572R1
Each
MYR42,653.25
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 237-6289
  • Mfr. Part No. 1SDA067230R1
Each
MYR1,191.85
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 20A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9829
  • Mfr. Part No. 3VA1120-5ED46-0AA0
Each
MYR2,679.43
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4668
  • Mfr. Part No. 3VA2140-7KP32-0AA0
Each
MYR9,499.37
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9891
  • Mfr. Part No. 1SDA070724R1
Each
MYR24,680.16
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9682
  • Mfr. Part No. 3VA11106FD460AA0
Each
MYR3,513.01
Better World
Siemens SENTRON 5SY7 MCB, 4P, 4A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8907
  • Mfr. Part No. 5SY7404-7
Each
MYR1,128.46
Siemens SENTRON 5SJ4 MCB, 1P, 4A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 202-7117
  • Mfr. Part No. 5SJ4104-7HG42
Each
MYR318.83
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4547
  • Mfr. Part No. 3VA2125-7HK32-0AA0
Each
MYR4,249.41
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4480
  • Mfr. Part No. 1SDA072688R1
Each
MYR36,063.67
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA
  • RS Stock No. 209-6933
  • Mfr. Part No. 3VA2163-6HN36-0AA0
Each
MYR4,495.73
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4656
  • Mfr. Part No. 3VA2140-7HN32-0AA0
Each
MYR4,712.07
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4654
  • Mfr. Part No. 3VA2140-7HM42-0AA0
Each
MYR7,074.42
Schurter 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 870-1629
  • Mfr. Part No. 7010.3280
Each (In a Pack of 10)
MYR7.298
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9367
  • Mfr. Part No. 3VA1150-5GE46-0AA0
Each
MYR2,722.42
Better World
Siemens, 0AA0 MCCB 4P 125A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-5985
  • Mfr. Part No. 3VA1112-5EF42-0AA0
Each
MYR5,180.21
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 6A Current Rating
  • RS Stock No. 201-5735
  • Mfr. Part No. 2800885
Each
MYR471.41
Siemens SENTRON Cover for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9386
  • Mfr. Part No. 3VA9401-0WG40
Each
MYR742.10
1
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