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

61 of 999+
In Stock
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
Temporarily out of stock
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
Temporarily out of stock
Schneider Electric Acti9 iARC AFDD, 40A, 1 Pole, 230V ac
  • RS Stock No. 654-745
  • Mfr. Part No. A9TSB3640
Each
HK$2,741.42
In Stock
Schneider Electric Resi9 Resi9 XE DM MCB, 1P, 6A Curve C, 230V AC, 3000 A Breaking Capacity
  • RS Stock No. 287-6044
  • Mfr. Part No. R9EFC606
Each
HK$424.00
Temporarily out of stock
Bulgin 13A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 408-369
  • Mfr. Part No. FX0415
Each
HK$104.00
In Stock
Siemens 4A Bottle Fuse Holder
  • RS Stock No. 622-1196
  • Mfr. Part No. 5SH5004
Each (In a Pack of 50)
HK$2.928
In Stock
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
In Stock
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
Temporarily out of stock
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
In Stock
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
In Stock
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
In Stock
Littelfuse 15A PCB Mount Fuse Holder for Mini Fuse, 32V dc
  • RS Stock No. 787-4344
  • Mfr. Part No. 01530009Z
Each
HK$29.50
Temporarily out of stock
Eaton 1.25kA Base Mount Fuse Holder, 1P, 1kV
  • RS Stock No. 182-1372
  • Mfr. Part No. 170H3004
Each
HK$3,995.20
In Stock
Eaton 200A Rail Mount Fuse Holder for B2 Fuse, 1P, 690V ac
  • RS Stock No. 415-092
  • Mfr. Part No. RS200H
Each
HK$6,954.90
In Stock
Bulgin 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 413-771
  • Mfr. Part No. FX0365
Each
HK$115.30
In Stock
Littelfuse Inline Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 787-4372
  • Mfr. Part No. 277.6306.0001
Each
HK$105.60
Temporarily out of stock
Better World
Siemens 3VA92 RCD, 250A, 4 Pole, Type A
  • RS Stock No. 210-9331
  • Mfr. Part No. 3VA9214-0RS20
Each
HK$14,271.70
In Stock
Littelfuse 60A Inline Fuse Holder for Maxi Fuse
  • RS Stock No. 894-9578
  • Mfr. Part No. 01520001U
Each
HK$63.40
In Stock
Littelfuse 16A Panel Mount Fuse Holder for 5 x 20, 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 787-4319
  • Mfr. Part No. 80000000105
Each (In a Pack of 5)
HK$20.84
In Stock
ABB RCBO, 32A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5102
  • Mfr. Part No. 2CSR254001R1324
Each
HK$2,531.00
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