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

174 / 999+
Eaton 15A PCB Mount 5 x 20mm Fuse Block, 250V
  • RS Stock No. 233-0609
  • Mfr. Part No. BK4-HTC-528M
Each (In a Pack of 10)
MYR5.722
Schneider Electric Acti9 Reds RCCB, 25A, 300mA, 230V
  • RS Stock No. 357-676
  • Mfr. Part No. A9CR5225
Each
MYR4,281.40
Littelfuse PCB Mount Fuse Holder for Mini Fuse, 125V ac
  • RS Stock No. 787-4369
  • Mfr. Part No. 178.6764.0001
Each
MYR16.70
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA2, 3 channels
  • RS Stock No. 156-606
  • Mfr. Part No. 3VA2463-6HM32-0AA0
Each
MYR18,204.13
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7271
  • Mfr. Part No. 1SDA067377R1 TMD 16-300 XT4 3p
Each
MYR2,533.40
Eaton xPole MCB, 3P, 50A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4412
  • Mfr. Part No. 242479 PLSM-C50/3-MW
Each
MYR584.43
Schneider Electric Linergy Busbar
  • RS Stock No. 653-821
  • Mfr. Part No. LVS04548
Each
MYR4,763.33
Schurter 8A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4240
  • Mfr. Part No. 8020.5020.G
Each (In a Pack of 10)
MYR4.604
Better World
Siemens SENTRON 5SL6 MCB, 2P, 13A Curve B, 400V AC, 72V DC
  • RS Stock No. 212-9002
  • Mfr. Part No. 5SL6213-6
Each
MYR284.16
Siemens 63A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 627-022
  • Mfr. Part No. 3NW8222-1
1 Pack of 10
MYR512.98
Siemens SENTRON Universal Release for use with 3VA1 and 3VA20-26
  • RS Stock No. 155-335
  • Mfr. Part No. 3VA9908-0BD12
Each
MYR1,412.86
Contactum 4 Way Steel Consumer Unit, 80A Defender
  • RS Stock No. 184-9133
  • Mfr. Part No. DR048MS
Each
MYR563.07
Siemens SIVACON S4 Connecting Terminals for use with SIVACON S4
  • RS Stock No. 626-482
  • Mfr. Part No. 8PQ4000-0BA82
Each
MYR396.46
Better World
Schneider Electric Acti 9 iDPN MCB, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 776-2682
  • Mfr. Part No. A9N21552
Each
MYR295.97
Eaton 40A Cartridge Fuses, 14 x 51mm
  • RS Stock No. 229-190
  • Mfr. Part No. C14G40S
1 Pack of 10
MYR425.17
Eaton 5A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-576
  • Mfr. Part No. TDC180-5A
Each (In a Pack of 10)
MYR4.314
Siemens SENTRON 5SJ MCB, 1P, 6A
  • RS Stock No. 232-2221
  • Mfr. Part No. 5SJ4106-8HG40
Each
MYR296.71
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 30mA, Type F, 400V ac
  • RS Stock No. 211-9644
  • Mfr. Part No. 5SV3346-3
Each
MYR2,295.24
Schurter 10A Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 269-3816
  • Mfr. Part No. 3101.0320
Each
MYR15.62
Eaton IZMX/INX Electronic Circuit Breaker 800A , Fixed
  • RS Stock No. 127-501
  • Mfr. Part No. 183357 IZMX16B3-P08F-1
Each
MYR35,754.71
1
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