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

155 of 999+
Temporarily out of stock
Siemens SENTRON 5SY6 MCB, 1P, 15A Curve C, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-636
  • Mfr. Part No. 5SY6118-7
Each
HK$289.54
In Stock
Phoenix Contact Electronic Circuit breaker
  • RS Stock No. 801-6937
  • Mfr. Part No. 0903030
Each
HK$790.40
Temporarily out of stock
Eaton Switch Disconnector for use with Circuit Breaker
  • RS Stock No. 229-005
  • Mfr. Part No. CCP2-1-30CC
1 Pack of 6
HK$3,104.20
Temporarily out of stock
Phoenix Contact CLIPLINE Electronic Circuit breaker 24A 24V PTCB E1, 1 channels
  • RS Stock No. 220-5800
  • Mfr. Part No. 1135740
Each
HK$358.60
In Stock
WAGO Electronic Circuit Breaker 2A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 303-310
  • Mfr. Part No. 787-3861/200-1000
Each
HK$432.90
Temporarily out of stock
Eaton Eaton Distribution Parts Connection Clamp for use with 185mm System
  • RS Stock No. 246-582
  • Mfr. Part No. 179770 Z-NHW-SLS-00-BBC
1 Pack of 3
HK$170.90
Temporarily out of stock
Eaton Eaton xEnergy Main Base for use with Busbar
  • RS Stock No. 240-171
  • Mfr. Part No. 144596 XBSB-B
1 Pack of 10
HK$2,025.30
Temporarily out of stock
WAGO Electronic Circuit Breaker 6A 24V 787, 4 channels , DIN Rail
  • RS Stock No. 279-4106
  • Mfr. Part No. 787-1664/006-1054
Each
HK$2,688.70
Temporarily out of stock
Eaton Eaton xEnergy Main Base for use with Busbar
  • RS Stock No. 243-292
  • Mfr. Part No. 144597 XBSN-B
1 Pack of 10
HK$839.10
Temporarily out of stock
Phoenix Contact PTCB Electronic Circuit Breaker 100mA 24V PTCB E1, 1 channels , DIN Rail
  • RS Stock No. 488-366
  • Mfr. Part No. 1464484
Each
HK$311.70
Temporarily out of stock
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-652
  • Mfr. Part No. 3VW9011-0AB11
1 Pack of 10
HK$774.20
Temporarily out of stock
Siemens SENTRON for use with 3VA52, 3VA61/62 Series
  • RS Stock No. 263-647
  • Mfr. Part No. 3VA9277-0CK72
1 Kit
HK$9,247.30
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 320mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-662
  • Mfr. Part No. 3RV2811-0DD10
Each
HK$2,062.00
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 1.25A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 159-669
  • Mfr. Part No. 3RV2811-0KD10
Each
HK$2,207.00
Temporarily out of stock
Siemens SENTRON Long Rear Connector for use with 3VA10/11
  • RS Stock No. 161-435
  • Mfr. Part No. 3VA9111-0QF10
Each
HK$178.00
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA55, 3VA65 Series
  • RS Stock No. 263-782
  • Mfr. Part No. 3VA9671-0WD30
Each
HK$1,033.10
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA61/62 Series
  • RS Stock No. 263-638
  • Mfr. Part No. 3VA9243-0JF60
1 Kit
HK$1,671.20
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 246-889
  • Mfr. Part No. 192279 NZMN3-4-PX630/VAR
Each
HK$45,922.50
Temporarily out of stock
PL-PKZ0 Cover for use with PKZ0
  • RS Stock No. 252-893
  • Mfr. Part No. 203599 PL-PKZ0
1 Pack of 5
HK$90.50
Temporarily out of stock
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-794
  • Mfr. Part No. 3VA9674-0JK32
1 Kit
HK$19,244.10
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