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

59 of 999+
Littelfuse 7.5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4139
  • Mfr. Part No. 028707.5PXCN
Each (In a Pack of 10)
HK$2.07
ABB System Pro M Compact S200 MCB, 1P, 20A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-7340
  • Mfr. Part No. 2CDS251001R0204 - S201C20
Each
HK$186.50
Schurter 10A Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 269-3814
  • Mfr. Part No. 3101.0120
Each
HK$35.30
Better World
ABB System Pro M Compact S200 MCB, 3P, 50A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7618
  • Mfr. Part No. 2CDS253001R0505 S203-B50
Each
HK$557.80
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 50A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5990
  • Mfr. Part No. 5SL4550-7
Each
HK$959.60
Better World
Siemens Sentron 5SY4 MCB, 1+N, 10A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1420
  • Mfr. Part No. 5SY4510-7
Each
HK$646.90
Siemens SENTRON 5SJ4 MCB, 1P, 4A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7044
  • Mfr. Part No. 5SJ4104-7HG41
Each
HK$488.10
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
ABB RCBO, 25A Current Rating, 3P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 767-4428
  • Mfr. Part No. 2CSR273001R1254 DS203 M AC-C25/0,03
Each
HK$2,717.92
Hager Electronic Circuit Breaker 10A MFS, 1 channels
  • RS Stock No. 251-2067
  • Mfr. Part No. MFS710
Each (In a Pack of 12)
HK$206.762
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 384-106
  • Mfr. Part No. 3101.0055
Each (In a Pack of 5)
HK$27.50
Schurter 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 384-027
  • Mfr. Part No. 3101.0015
Each (In a Pack of 5)
HK$32.24
Eaton 63A Rail Mount Fuse Holder for 22 x 127mm Fuse, 1P, 1.5kV
  • RS Stock No. 182-1745
  • Mfr. Part No. CH127-1
Each
HK$1,907.70
Eaton 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 852-6963
  • Mfr. Part No. HTB-54I-R
Each
HK$104.30
Eaton 20A Rail Mount Fuse Holder for E1 Fuse, 1P, 550V ac
  • RS Stock No. 418-681
  • Mfr. Part No. SC20H
Each
HK$573.90
Schurter 20A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 344-5642
  • Mfr. Part No. 0031.1803
Each (In a Pack of 5)
HK$34.06
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 419-088
  • Mfr. Part No. 0031.3901
Each (In a Pack of 5)
HK$41.46
Eaton 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 169-9385
  • Mfr. Part No. HTC-50M
1 Bag of 1000
HK$32,728.00
Bulgin 10A Inline Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 420-044
  • Mfr. Part No. FX0185
Each (In a Pack of 5)
HK$86.90
Littelfuse 15A PCB Mount Fuse Holder for Mini Fuse, 32V dc
  • RS Stock No. 787-4344
  • Mfr. Part No. 01530009Z
Each
HK$29.50
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