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

47265 Products showing for Fuses & Circuit Breakers

184 of 999+
Temporarily out of stock
Eaton Distribution Parts Rigid Wire Jumper for use with Distribution Parts
  • RS Stock No. 252-821
  • Mfr. Part No. 215621 RVS-3PHAS+N/150
1 Pack of 3
HK$225.80
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 3.2A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-713
  • Mfr. Part No. 3RV2321-1DC20
Each
HK$1,014.40
Temporarily out of stock
SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 264-000
  • Mfr. Part No. 3VA9244-0JG12
1 Kit
HK$772.90
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-205
  • Mfr. Part No. 3VA2140-8HK36-0AA0
Each
HK$9,400.80
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9803
  • Mfr. Part No. 3VA1116-6GD42-0AA0
Each
HK$9,658.20
Temporarily out of stock
Better World
Siemens SENTRON Terminal for use with 3VA5/6
  • RS Stock No. 272-0227
  • Mfr. Part No. 3VA9473-0JA13
Each
HK$1,808.10
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4171
  • Mfr. Part No. 3VA1112-4ED36-0AA0
Each
HK$6,162.60
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-3328
  • Mfr. Part No. 3VA1112-5GE42-0AA0
Each
HK$9,015.20
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 4 channels
  • RS Stock No. 157-426
  • Mfr. Part No. 3VA2140-8KP46-0AA0
Each
HK$20,911.70
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4941
  • Mfr. Part No. 3VA1120-4GF46-0AA0
Each
HK$4,851.90
In Stock
Schurter 8040 Screw Mount Fuse Clip for 17.8 x 11.1mm
  • RS Stock No. 221-5662
  • Mfr. Part No. 8040.2002.01
1 Box of 20
HK$160.82
In Stock
Socomec 630A Neutral Link for Neutral Bar Fuses
  • RS Stock No. 252-5326
  • Mfr. Part No. 64210003
Each
HK$422.48
Temporarily out of stock
SENTRON Shunt Trip Voltage Release for use with 3VA4/5/6 Series
  • RS Stock No. 263-865
  • Mfr. Part No. 3VA9978-0BL30
Each
HK$859.80
In Stock
Littelfuse 200A Blue Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4410
  • Mfr. Part No. 0298200.ZXEH
Each
HK$45.70
Temporarily out of stock
Legrand RCBO, 4P, 10A, Type AC, 400V AC
  • RS Stock No. 255-2329
  • Mfr. Part No. 411204
Each
HK$6,480.42
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4509
  • Mfr. Part No. 3VA2125-0KP36-0AA0
Each
HK$19,148.10
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4685
  • Mfr. Part No. 3VA2163-0HL36-0AA0
Each
HK$10,324.60
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4084
  • Mfr. Part No. 3VA2116-6KQ42-0AA0
Each
HK$26,222.50
In Stock
Hager NGT MCB, 1+N, 32A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4800
  • Mfr. Part No. NGT732
Each
HK$1,186.60
Temporarily out of stock
Siemens SENTRON Terminal for use with 3VA5 250
  • RS Stock No. 269-7157
  • Mfr. Part No. 3VA9234-0JH11
Each (In a Pack of 4)
HK$230.075
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