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

104 / 999+
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4275
  • Mfr. Part No. 3VA1163-4EF36-0AA0
Each
MYR1,493.82
Siemens 4A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2041
  • Mfr. Part No. 3NW6004-1
Each (In a Pack of 10)
MYR23.77
Schneider Electric Easypact Cvs100...250, Nsx100...250 Dc DIN Rail Adapter for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1184
  • Mfr. Part No. LV429305
Each
MYR802.79
Legrand DX Range DX3 MCB, 4P, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9755
  • Mfr. Part No. 4 078 99
Each
MYR820.28
Eaton 50mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1666
  • Mfr. Part No. S506-50-R
Each (In a Pack of 10)
MYR2.346
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 32A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9147
  • Mfr. Part No. A9F77232
Each
MYR654.80
Phoenix Contact 3 Phase Surge Protector, 50kA, 1.9kV, DIN Rail Mount
  • RS Stock No. 890-3742
  • Mfr. Part No. 2905340
Each
MYR2,356.77
Mersen 100A FF Cartridge Fuse, 22 x 58mm
  • RS Stock No. 136-0499
  • Mfr. Part No. F1018560 / FR22GR69V100
Each (In a Box of 10)
MYR199.573
Eaton xEffect MCB, 3P, 10A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 624-0456
  • Mfr. Part No. 278869 FAZ-C10/3
Each
MYR607.43
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-782
  • Mfr. Part No. 3VA5210-5EF41-0AA0
Each
MYR8,490.15
ABB 24 → 30V ac/dc Shunt Trip Shunt trip for use with Tmax XT1, Tmax XT2, Tmax XT3, Tmax XT4
  • RS Stock No. 831-9194
  • Mfr. Part No. 1SDA066322R1 SOR-C XT1..XT4 F/P 24-30 Vac/dc
Each
MYR603.82
RS PRO 12A FF Ceramic Cartridge Fuse, 6 x 30mm
  • RS Stock No. 174-8017
Each (In a Box of 500)
MYR6.776
Legrand 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6116
  • Mfr. Part No. 0 133 06
Each (In a Box of 10)
MYR13.249
ABB RCBO, 25A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5195
  • Mfr. Part No. 2CSR274001R1255
Each
MYR2,028.15
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 339-788
  • Mfr. Part No. SEE125B03
Each
MYR854.22
Eaton 32A Rail Mount Fuse Holder for A2 Fuse, 1P, 690V ac
  • RS Stock No. 221-617
  • Mfr. Part No. RS32P
Each
MYR167.31
Eaton 32A Fuse Holder for 103 x 31 x 151mm Fuse, 1P, 690V ac
  • RS Stock No. 261-370
  • Mfr. Part No. RS32P
1 Pack of 10
MYR1,659.00
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-542
Each (In a Pack of 10)
MYR1.721
Schneider Electric, ComPacT MCCB 4P 200A, Fixed Mount
  • RS Stock No. 260-7876
  • Mfr. Part No. C25B4TM200
Each
MYR10,362.87
Eaton xEffect FAZ MCB, 2P, 500mA Curve D, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 248-612
  • Mfr. Part No. 102177 FAZ-D0,5/2-NA
Each
MYR912.54
1
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