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

125 of 999+
In Stock
Schurter Surface Mount Fuse 2A, 250V ac
  • RS Stock No. 270-7940
  • Mfr. Part No. 3403.0169.11
Each
HK$4.10
In Stock
Littelfuse 1.6A Resettable Fuse, 30V dc
  • RS Stock No. 517-6792P
  • Mfr. Part No. RUEF160
Each (Supplied in a Bag)
HK$2.69
Temporarily out of stock
Eaton 80A NH Fuse, 58 x 30 x 135mm, 500V ac
  • RS Stock No. 259-309
  • Mfr. Part No. 290012 Z-NH-1/80
1 Pack of 3
HK$325.50
Temporarily out of stock
Siemens 5SV43 RCCB, 80A, 4 Pole, 30mA, Type AC, 400V
  • RS Stock No. 328-476
  • Mfr. Part No. 5SV4347-0MB
Each
HK$8,947.27
In Stock
Eaton 80A gG/gL Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-921
  • Mfr. Part No. C22G80
1 Pack of 10
HK$403.80
Temporarily out of stock
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0828
  • Mfr. Part No. 3WA9111-0AV31
Each
HK$1,728.20
Temporarily out of stock
SENTRON for use with 3VA6 Series
  • RS Stock No. 263-694
  • Mfr. Part No. 3VA9977-0TA10
Each
HK$18,028.70
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-203
  • Mfr. Part No. 3VA2140-8HK32-0AA0
Each
HK$9,071.20
In Stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 500V ac
  • RS Stock No. 173-9261
  • Mfr. Part No. 0031.2320
Each (In a Box of 25)
HK$72.628
Temporarily out of stock
Siemens SENTRON Long Rear Connector for use with 3VA10/11
  • RS Stock No. 161-430
  • Mfr. Part No. 3VA9111-0QF20
Each
HK$248.70
Temporarily out of stock
Schneider Electric 10A Cartridge Fuses, 22.2 x 58mm
  • RS Stock No. 438-992
  • Mfr. Part No. DF2FN10
1 Pack of 10
HK$1,433.80
Temporarily out of stock
Siemens SENTRON Plug In Kit for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9373
  • Mfr. Part No. 3VA9323-0KP00
Each
HK$7,860.90
Temporarily out of stock
Hager BS RCCB, 63A, 2P Pole, Type AC
  • RS Stock No. 602-080
  • Mfr. Part No. BS264
Each
HK$3,858.70
Temporarily out of stock
Hager ARC RCCB, 40A, 2 Pole
  • RS Stock No. 602-043
  • Mfr. Part No. ARC241F
Each
HK$3,054.10
Temporarily out of stock
Eaton xEffect RCCB, 63A, 2 Pole, 300mA, Type F, 240V ac
  • RS Stock No. 248-939
  • Mfr. Part No. 187398 FRCMM-63/2/03-S/F
Each
HK$4,127.00
Temporarily out of stock
Hager BDF RCCB, 40A, 3P+N Pole, 30mA, Type F
  • RS Stock No. 602-172
  • Mfr. Part No. BDF440F
Each
HK$4,847.30
Temporarily out of stock
Hager BFF RCCB, 25A, 3P+N Pole, 300mA, Type F
  • RS Stock No. 602-065
  • Mfr. Part No. BFF425F
Each
HK$4,243.30
Temporarily out of stock
Lasttrennschalter Resi9, 3P+N, 63A, 415V
  • RS Stock No. 537-825
  • Mfr. Part No. R9S64463
Each
HK$414.72
Temporarily out of stock
Hager CFB RCD Switch, 25A, 4 Pole, 300mA, Type B, 230 → 400V
  • RS Stock No. 599-750
  • Mfr. Part No. CFB625F
Each
HK$8,531.30
In Stock
Schneider Electric Acti9 Busbar, 440V ac, 18mm Pitch
  • RS Stock No. 466-546
  • Mfr. Part No. A9XPH318
1 Pack of 5
HK$3,391.80
1
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