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

2252 of 999+
In Stock
Schneider Electric Linergy Busbar
  • RS Stock No. 130-977
  • Mfr. Part No. LVS04545
Each
HK$13,068.96
Temporarily out of stock
Eaton Three Phase Surge Protector, 40kA, 1.6kV, DIN Rail Mount
  • RS Stock No. 120-782
  • Mfr. Part No. 167601 SPCT2-335/4
Each
HK$8,334.96
Temporarily out of stock
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 211-9664
  • Mfr. Part No. 5SV3416-8
Each
HK$2,715.90
Temporarily out of stock
Eaton 16A NH Fuse, 51 x 21 x 79mm, 400V ac
  • RS Stock No. 244-721
  • Mfr. Part No. 16NHG000BI-400 NH FUSE 16A 400V GG SIZE 000
1 Pack of 3
HK$169.50
Temporarily out of stock
ABB IEC Range Busbar for use with DDA200, F200, S200
  • RS Stock No. 250-4743
  • Mfr. Part No. 2CDL220010R1012
1 Box of 50
HK$6,248.09
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 800A, Fixed Mount
  • RS Stock No. 247-1788
  • Mfr. Part No. 33384
Each
HK$43,278.24
In Stock
Littelfuse 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 754-6294
  • Mfr. Part No. 0SPF020
Each
HK$94.60
In Stock
Eaton 10A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8923
  • Mfr. Part No. STD10
Each
HK$32.60
In Stock
ABB RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6931
  • Mfr. Part No. 2CSR255180R1105
Each
HK$1,599.50
Temporarily out of stock
Eaton Eaton Moeller NZM Residual Current Release for use with Four Pole NZM1-4, N1-4
  • RS Stock No. 248-016
  • Mfr. Part No. 104613 NZM1-4-XFI300U
Each
HK$8,007.90
Temporarily out of stock
ABB 1.25kA Tag Fuse, 200 x 68 x 119mm, 500V
  • RS Stock No. 251-3499
  • Mfr. Part No. 1SCA022627R7830
Each
HK$2,261.15
In Stock
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 1A Current Rating
  • RS Stock No. 333-237
  • Mfr. Part No. 201-1A
Each
HK$298.00
Temporarily out of stock
Eaton Eaton xEffect Busbar, 1000 V ac, 1500 V ac, 6mm Pitch
  • RS Stock No. 243-716
  • Mfr. Part No. 081222 CU-BAND6X16X0,8-BU
Each
HK$735.90
In Stock
Europa EUC1P EUB MCB, 1P, 32A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6478
  • Mfr. Part No. EUC1P32B
Each
HK$64.80
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5125
  • Mfr. Part No. 3VA2110-5KP36-0AA0
Each
HK$12,299.30
Temporarily out of stock
RS PRO 12A FF Ceramic Cartridge Fuse, 6 x 30mm
  • RS Stock No. 174-8017
Each (In a Box of 500)
HK$45.909
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-464
  • Mfr. Part No. 3VA6560-7JP36-0AA0
Each
HK$44,196.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9366
  • Mfr. Part No. 3VA1150-5GE42-0AA0
Each
HK$4,418.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3562
  • Mfr. Part No. 3VA2010-6KQ32-0AA0
Each
HK$32,710.80
Temporarily out of stock
Eaton xEffect MCB, 4P, 1.5A Curve B
  • RS Stock No. 230-0867
  • Mfr. Part No. 177421 FAZ6-B1,5/4
Each
HK$1,265.86
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