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

46579 Products showing for Fuses & Circuit Breakers

2315 / 999+
Temporarily out of stock
Schurter TA36 Rocker Circuit Breaker - TA36 Single Pole 32 V dc, 277 V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 221-5584
  • Mfr. Part No. 3-128-199
1 Box of 50
MYR2,272.31
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1697
  • Mfr. Part No. 3VA2010-5HL46-0AA0
Each
MYR3,882.96
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 36 kA
  • RS Stock No. 209-6774
  • Mfr. Part No. 3VA1120-4EF32-0AA0
Each
MYR1,773.06
Temporarily out of stock
Legrand MPX³ Enclosure for use with Motor Circuit Breaker
  • RS Stock No. 266-1393
  • Mfr. Part No. 417481
Each
MYR284.53
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4512
  • Mfr. Part No. 3VA2125-0KQ32-0AA0
Each
MYR10,838.79
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4393
  • Mfr. Part No. 1SDA072575R1
Each
MYR141,526.64
Temporarily out of stock
Better World
Siemens RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6157
  • Mfr. Part No. 5SU1324-6KX32
Each
MYR1,001.14
Temporarily out of stock
Siemens 25A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2040
  • Mfr. Part No. 3NW3250-0HG
Each (In a Pack of 10)
MYR128.30
Temporarily out of stock
Better World
Siemens, 3VA2 MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-3343
  • Mfr. Part No. 3VA2140-6KP46-0AA0
Each
MYR9,850.39
Temporarily out of stock
Siemens 50A Tag Fuse, NH1, 690 / 440V ac/dc
  • RS Stock No. 143-911
  • Mfr. Part No. 3NA6120-6
1 Pack of 3
MYR704.84
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-3573
  • Mfr. Part No. 1SDA071551R1
Each
MYR34,754.56
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 209-4987
  • Mfr. Part No. 3VA1140-6ED32-0AA0
Each
MYR1,488.57
In Stock
Bourns 63A Tag Fuse, 66mm, 500V ac, 24.1mm
  • RS Stock No. 254-4198
  • Mfr. Part No. PF-JT3-63
Each (In a Box of 80)
MYR94.271
Temporarily out of stock
Better World
ABB, XT4L MCCB 4P 100A, Fixed Mount
  • RS Stock No. 236-6828
  • Mfr. Part No. 1SDA068578R1 XT4L 160 Ekip I 100A FF
Each
MYR8,147.58
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7503
  • Mfr. Part No. C10W3TM100
Each
MYR7,073.69
Temporarily out of stock
Mersen 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 768-3762
  • Mfr. Part No. F331067
Each
MYR386.61
Temporarily out of stock
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB Single Pole 50V dc Voltage Rating,
  • RS Stock No. 212-8792
  • Mfr. Part No. 2800867
Each
MYR235.69
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3675
  • Mfr. Part No. 3VA2025-7HN42-0AA0
Each
MYR7,250.98
Temporarily out of stock
Siemens SENTRON 3VA9 Mounting Frame for use with 3VA2 100/160/250
  • RS Stock No. 218-1807
  • Mfr. Part No. 3VA9163-0SB10
Each
MYR246.58
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4574
  • Mfr. Part No. 1SDA072824R1
Each
MYR35,394.18
1
2315
2329
Results per page

Related links