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

218 of 999+
In Stock
Schneider Electric Acti9 A9F MCB, 1P, 16A Curve B, 230V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 288-7084
  • Mfr. Part No. A9F93116
Each
HK$344.00
Temporarily out of stock
ABB F200 RCCB, 125A, 4 Pole, 500mA, Type B, 400V ac
  • RS Stock No. 176-9630
  • Mfr. Part No. F204B-125/0.5
Each
HK$52,365.25
In Stock
Schurter 10A PCB Mount Fuse Holder for 5 x 20 mm, 6.3 x 32 mm Fuse, 500V ac
  • RS Stock No. 336-7851
  • Mfr. Part No. 0031.8231
Each (In a Pack of 10)
HK$15.22
In Stock
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7739
  • Mfr. Part No. C16B3TM100
Each
HK$6,972.19
Temporarily out of stock
RS PRO SMD Non-Resettable Surface Mount Fuse 3A, 63V
  • RS Stock No. 252-2130
Each (On a Tape of 4000)
HK$0.842
In Stock
Eaton 32A Rail Mount Fuse Holder for A1 Fuse, 1P, 660V ac
  • RS Stock No. 418-451
  • Mfr. Part No. CM32FC
Each
HK$1,741.80
In Stock
Littelfuse 15A PCB Mount Fuse Holder, 32V dc
  • RS Stock No. 360-7317
  • Mfr. Part No. 01530008Z
Each (In a Pack of 5)
HK$28.60
Temporarily out of stock
Siemens, SENTRON MCCB 3P 300A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 256-561
  • Mfr. Part No. 3VA5330-7EC31-2AA0
Each
HK$16,392.10
In Stock
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 182-1796
  • Mfr. Part No. CHCC3DU
Each
HK$897.80
In Stock
Schurter PCB Mount Fuse Holder for 5 x 20mm Fuse
  • RS Stock No. 379-274
  • Mfr. Part No. 1331.0044
Each (In a Pack of 20)
HK$11.99
Temporarily out of stock
ABB RCBO, 25A Current Rating, 3P Poles, Type C
  • RS Stock No. 237-5085
  • Mfr. Part No. 2CSR253101R1254
Each
HK$2,930.19
Temporarily out of stock
Siemens, SENTRON MCCB 4P 175A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-468
  • Mfr. Part No. 3VA5217-5GD41-0AA0
Each
HK$15,438.70
In Stock
Eaton 630A Rail Mount Fuse Holder for NH3 Fuse, 1P, 690V ac
  • RS Stock No. 182-1703
  • Mfr. Part No. SD3-D-PV
Each
HK$1,981.00
In Stock
Schneider Electric, ComPacT NSX Circuit breaker 1P 100A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-232
  • Mfr. Part No. IL1001P251
Each
HK$1,844.20
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 1P, 25A Curve C, 6 kA Breaking Capacity
  • RS Stock No. 203-2334
  • Mfr. Part No. 5SY6125-7
Each
HK$217.40
In Stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 4P 63A, Fixed Mount
  • RS Stock No. 232-0255
  • Mfr. Part No. 1SDA067422R1 XT1N 160 TMD 63A FF
Each
HK$3,130.00
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3P, 500mA Curve K, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-170
  • Mfr. Part No. 2CDS273001R0157
Each
HK$3,342.17
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-3114
  • Mfr. Part No. 1SDA070967R1
Each
HK$91,492.76
In Stock
Europa EUC1P EUC MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6490
  • Mfr. Part No. EUC1P4C
Each
HK$67.30
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 25A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-327
  • Mfr. Part No. 3VA5125-6ED11-0AA0
Each
HK$1,200.00
1
218
2364
Results per page

Related links