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

2223 of 999+
Eaton 125A Tag Fuse, 01XL, 1kV, 189mm
  • RS Stock No. 282-6495
  • Mfr. Part No. PV-125A-01XL
Each
HK$3,053.00
Eaton xEffect MCB, 1P, 4A Curve D, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6936
  • Mfr. Part No. 102102 FAZ-D4/1-NA
Each
HK$337.80
RS PRO 500mA FF Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 420-066
Each (In a Pack of 10)
HK$15.14
ABB 220 → 400V ac/dc Shunt Trip Shunt trip for use with S800PV, S800S, S800N, S800C, S800B, S800HV, S800U Series
  • RS Stock No. 435-538
  • Mfr. Part No. 2CCS800900R0231 S800-SOR400
Each
HK$811.10
Phoenix Contact Thermal Circuit Breaker - Single Pole 32V dc Voltage Rating Base Mounting, 15A Current Rating
  • RS Stock No. 608-090
  • Mfr. Part No. 1499968
Each
HK$71.10
Better World
Schneider Electric 16A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-1213
  • Mfr. Part No. DF2CN16
Each (In a Pack of 10)
HK$63.01
Better World
Schneider Electric Compact Nsx Cover for use with Compact Nsx400 - 630 Dc
  • RS Stock No. 221-1292
  • Mfr. Part No. LV438345
Each
HK$2,420.81
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-902
  • Mfr. Part No. 3VA6110-6KT31-0AA0
Each
HK$18,164.30
ABB 160A Tag Fuse, 79 x 30 x 60mm, 500V
  • RS Stock No. 251-3438
  • Mfr. Part No. 1SCA022627R1710
1 Box of 3
HK$410.99
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 63A Curve B, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3271
  • Mfr. Part No. A9F53463
Each
HK$1,594.90
ABB 125A Tag Fuse, NH1, 690V
  • RS Stock No. 250-4466
  • Mfr. Part No. 1SCA022701R0020
1 Box of 3
HK$957.67
Schurter 500mA M Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7364
  • Mfr. Part No. 0034.2513
Each (In a Pack of 10)
HK$9.10
Schneider Electric 250V ac Shunt Trip Circuit Trip for use with DIN rail mounting support
  • RS Stock No. 219-9233
  • Mfr. Part No. A9E18073
Each
HK$230.40
Miniature Circuit Breaker 1 B
  • RS Stock No. 599-625
  • Mfr. Part No. S201S-B6
Each
HK$219.23
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 16A Curve B, 15 kA Breaking Capacity
  • RS Stock No. 219-9251
  • Mfr. Part No. A9F93216
Each
HK$1,706.14
Eaton MCB, 1+N, 40A Curve C
  • RS Stock No. 230-1083
  • Mfr. Part No. 264750 PLG4-C40/1N
Each
HK$178.56
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-025
  • Mfr. Part No. 3VA6115-8JT41-0AA0
Each
HK$26,618.60
Mersen 1A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2734
  • Mfr. Part No. E213605
1 Box of 10
HK$347.70
Better World
Schneider Electric ID RCCB, 63A, 4 Pole, 300mA, Type AC, 415V ac
  • RS Stock No. 248-3872
  • Mfr. Part No. M9R14463
Each
HK$2,528.10
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9798
  • Mfr. Part No. 3VA1116-6FD46-0AA0
Each
HK$10,022.70
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