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

47266 Products showing for Fuses & Circuit Breakers

20 of 999+
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 1P, 400V ac
  • RS Stock No. 189-5326
  • Mfr. Part No. V1062687 / CMC81
Each
HK$54.10
Eaton PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 769-3236
  • Mfr. Part No. SR-5-500MA-BK
Each (In a Pack of 10)
HK$11.77
Better World
ABB System Pro M Compact S200M MCB, 2P, 6A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-015
  • Mfr. Part No. 2CDS272001R0064 S202M-C6
Each
HK$590.60
SIBA 2A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3391
  • Mfr. Part No. 70-010-04/2A
Each (In a Pack of 5)
HK$50.58
Eaton Fuse Puller, Sizes 1 → 1-3/4
  • RS Stock No. 849-5973
  • Mfr. Part No. FP-3
Each
HK$715.70
Eaton NH Fuse Puller, Sizes 00 → 3
  • RS Stock No. 182-1518
  • Mfr. Part No. FEH
Each
HK$1,687.90
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, SENTRON Range
  • RS Stock No. 187-3288
  • Mfr. Part No. 5SV1316-7KK13
Each
HK$747.20
Better World
ABB System Pro M Compact S200 MCB, 3P, 25A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9627
  • Mfr. Part No. 2CDS253001R0251 S203-D25
Each
HK$536.80
Eaton 63A British Standard Fuse, A4, 500V ac, 94mm
  • RS Stock No. 415-323
  • Mfr. Part No. CEO63
Each
HK$99.70
Eaton xEffect - FRCmM RCCB, 25A, 2 Pole, 300mA, Type A, 110V
  • RS Stock No. 127-424
  • Mfr. Part No. 180606 FRCMM-25/2/03-A-110
Each
HK$1,387.50
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 2P, 600V ac
  • RS Stock No. 144-1834
  • Mfr. Part No. 0031.9161
Each
HK$152.70
Better World
Schneider Electric RCBO, 32A Current Rating, 3P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3289
  • Mfr. Part No. A9DK1732
Each
HK$3,693.80
Littelfuse 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4684
  • Mfr. Part No. 0215002.MXP
Each (In a Pack of 10)
HK$10.10
20A Fuse Holder for 55 x 79mm Fuse, 1P, 690V
  • RS Stock No. 261-964
  • Mfr. Part No. RS20H
1 Pack of 10
HK$2,111.60
Better World
Schneider Electric, Compact MCCB 3P 40A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-8058
  • Mfr. Part No. LV426103
Each
HK$2,475.13
Better World
Schneider Electric, ComPacT NSX MCCB 3P 125A, Fixed Mount
  • RS Stock No. 254-6344
  • Mfr. Part No. C16F3TM125
Each
HK$7,267.40
SIBA 630mA T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3295
  • Mfr. Part No. 70-007-65/0.63A
Each (In a Pack of 10)
HK$3.46
ABB Flange for use with Tmax XT
  • RS Stock No. 236-6851
  • Mfr. Part No. 1SDA068655R1
Each
HK$461.80
RS PRO HBC Fuse Kit
  • RS Stock No. 611-8983
Each
HK$1,105.00
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1177
  • Mfr. Part No. S500-2-R
Each (In a Pack of 10)
HK$3.08
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