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

323 / 999+
Temporarily out of stock
Better World
Siemens SENTRON 5SY8 MCB, 1P, 25A Curve C
  • RS Stock No. 216-5948
  • Mfr. Part No. 5SY8125-7
Each
MYR264.80
Temporarily out of stock
Siemens SENTRON 5SJ4360 MCB, 3P, 60A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 300-085
  • Mfr. Part No. 5SJ4360-8HG41
Each
MYR3,631.55
In Stock
ABB SMISSLINE TP S400M MCB, 3P, 16A Curve C, 415V AC, 30 kA Breaking Capacity
  • RS Stock No. 246-2639
  • Mfr. Part No. 2CCS573001R0164
Each
MYR625.30
Temporarily out of stock
Siemens SENTRON Door Feedthrough Accessory for use with 3VF7, 3VF8, Operating Shafts 12 x 12 mm
  • RS Stock No. 266-484
  • Mfr. Part No. 8UC7424-3BB44
Each
MYR1,868.54
In Stock
Mersen Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 179-3083
  • Mfr. Part No. 83230512 / STMT23-10K320V-SP-SF
Each
MYR390.92
In Stock
Littelfuse SMD Non Resettable Fuse 3.15A, 125V
  • RS Stock No. 738-2902
  • Mfr. Part No. 04513.15MRL
Each (In a Pack of 10)
MYR4.346
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7700
  • Mfr. Part No. C12H4TM160B
Each
MYR7,378.27
Temporarily out of stock
Eaton RCCB, 40A, 2 Pole, 300mA, Type S, 230V ac
  • RS Stock No. 227-0720
  • Mfr. Part No. 264285 PFGM-40/2/03-S
Each
MYR1,573.49
Temporarily out of stock
Eaton xEffect - FBSmV RCCB, 40A, 2 Pole, 300mA, Type S, 240/415V ac
  • RS Stock No. 121-137
  • Mfr. Part No. 170142 FBSMV-40/2/03-S
Each
MYR798.06
Temporarily out of stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 335-968
  • Mfr. Part No. 106-P30-000040-5A
Each
MYR96.02
Temporarily out of stock
Siemens 224A NH Fuse, NH3, 440 - 500V ac/dc
  • RS Stock No. 269-8308
  • Mfr. Part No. 3NA3342
Each (In a Pack of 3)
MYR223.95
In Stock
Mersen 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 1P, 690V ac
  • RS Stock No. 768-3756
  • Mfr. Part No. A331016
Each
MYR84.61
In Stock
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 5A Current Rating
  • RS Stock No. 333-265
  • Mfr. Part No. 201-5A
Each
MYR209.77
In Stock
Mersen 125mA Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-809
  • Mfr. Part No. G090534Q
1 Box of 10
MYR39.26
In Stock
ABB High Performance S800N MCB, 4P, 16A Curve B
  • RS Stock No. 225-5975
  • Mfr. Part No. 2CCS894001R0165 S804N B 16A - 36 KA
Each
MYR1,592.52
Temporarily out of stock
Schneider Electric A9F Acti9 iC60 MCB, 2P, 1.6A Curve K, 500V AC, 125V DC, 400 V Breaking Capacity
  • RS Stock No. 334-997
  • Mfr. Part No. A9F95272
Each
MYR1,007.44
Temporarily out of stock
Schneider Electric Acti9 Acti9 Reflex MCB, 2P, 25A Curve D, 230V AC, 24V DC, 10 KA Breaking Capacity
  • RS Stock No. 205-158
  • Mfr. Part No. A9C63225
Each
MYR6,020.51
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 32A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8634
  • Mfr. Part No. EZ9F66132
Each
MYR30.34
In Stock
Socomec 8A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 252-5313
  • Mfr. Part No. 60120008
Each (In a Pack of 10)
MYR5.86
In Stock
Littelfuse 30A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 820-7199
  • Mfr. Part No. 0SPF030.T
Each
MYR87.96
1
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