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

2322 of 999+
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 25A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Each
HK$912.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9748
  • Mfr. Part No. 3VA1112-6GE46-0AA0
Each
HK$9,476.00
In Stock
Eaton MEMShield MCB, 3P, 16A Curve C, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3045
  • Mfr. Part No. EMCH316 EMCH316
Each
HK$995.20
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-8040
  • Mfr. Part No. C25W36E160
Each
HK$40,670.22
Temporarily out of stock
Better World
Schneider Electric Connection Adapter for use with Compact Nsx 100/160/250
  • RS Stock No. 221-1185
  • Mfr. Part No. LV429306
Each
HK$244.32
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with ALPHA DIN
  • RS Stock No. 629-063
  • Mfr. Part No. 8GK9910-0KK35
Each
HK$292.37
In Stock
Mersen 125A NH Fuse, NH000, 690V ac
  • RS Stock No. 448-3550
  • Mfr. Part No. M330038
Each
HK$448.30
In Stock
Mersen 3.15A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-874
  • Mfr. Part No. R090520Q
1 Box of 10
HK$46.87
Temporarily out of stock
ABB SU200 M MCB, 1P, 200mA Curve K, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-120
  • Mfr. Part No. 2CDS271337R0087
Each
HK$931.02
In Stock
Eaton xEffect FAZ MCB, 1P, 16A Curve B, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 245-987
  • Mfr. Part No. 132743 FAZ-B16/1-RT
Each
HK$219.50
Temporarily out of stock
Schneider Electric, PowerPact MCCB 2P 110A, Breaking Capacity 35 kA, Clip-On
  • RS Stock No. 429-496
  • Mfr. Part No. BGF26110
Each
HK$8,850.27
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 25A Curve C, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 204-471
  • Mfr. Part No. 2CDS381103R0254
Each
HK$1,465.28
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 25A, Breaking Capacity 35 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-316
  • Mfr. Part No. 3VA5125-5ED21-0AA0
Each
HK$3,346.90
In Stock
Mersen 8A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-892
  • Mfr. Part No. W090524Q
1 Box of 10
HK$64.42
Temporarily out of stock
Eaton xEffect MCB, 3P, 40A Curve B, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 244-680
  • Mfr. Part No. 174522 AZ-3N-B40
Each
HK$4,389.93
Temporarily out of stock
Siemens SENTRON Locking Device for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-625
  • Mfr. Part No. 3VW9011-0BA42
Each
HK$1,063.10
In Stock
RS PRO MCB, 1P, 4A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0202
Each
HK$84.90
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 6A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3518
  • Mfr. Part No. A9F55206
Each
HK$675.00
In Stock
Eaton xEffect MCB, 1P, 40A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6989
  • Mfr. Part No. 278539 FAZ-B40/1
Each
HK$209.80
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 16A, Fixed Mount
  • RS Stock No. 260-7567
  • Mfr. Part No. C11E4TM016L
Each
HK$4,768.31
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