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

81 of 999+
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 6 kA, Withdrawable
  • RS Stock No. 250-698
  • Mfr. Part No. 192352 NZMS3-PX400-AVE
Each
HK$36,903.20
Temporarily out of stock
Better World
Schneider Electric Busbar Trunking Jointing Device, KS Series
  • RS Stock No. 219-8918
  • Mfr. Part No. KSA250ZJ4
Each
HK$1,749.51
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, ≤1.5kV, DIN Rail Mount
  • RS Stock No. 890-3764
  • Mfr. Part No. 2905230
Each
HK$3,146.20
In Stock
Eaton DIN Rail Plate for use with N(S)1(-4) Series, NZM1(-4) Series, PN1(-4) Series
  • RS Stock No. 454-8310
  • Mfr. Part No. 260213 NZM1-XC35
Each
HK$217.90
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator, Canalis KS Series
  • RS Stock No. 211-0495
  • Mfr. Part No. KSB160SF4
Each
HK$7,635.40
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 250mA, 250V ac
  • RS Stock No. 895-1583P
  • Mfr. Part No. 0263.250MXL
Each (Supplied in a Bag)
HK$22.20
Temporarily out of stock
Lovato 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 216-8276
  • Mfr. Part No. FB01D1P
Each
HK$86.06
In Stock
Littelfuse SMD Non Resettable Fuse 500mA, 125V
  • RS Stock No. 738-2889P
  • Mfr. Part No. 0154.500DRT
Each (Supplied on a Reel)
HK$20.69
Temporarily out of stock
Eaton 30A Fuse Holder for 10 x 38mm Fuse, 2P, 100V
  • RS Stock No. 261-313
  • Mfr. Part No. CHPV2IU
1 Pack of 6
HK$1,369.70
Temporarily out of stock
RS PRO PC Board Non Resettable Fuse, Axial 12A, 32V ac/dc
  • RS Stock No. 764-9504
Each (In a Pack of 10)
HK$4.115
In Stock
Littelfuse 0.2A Resettable Fuse, 24V dc
  • RS Stock No. 506-937
  • Mfr. Part No. NANOSMDC020F
Each (In a Pack of 10)
HK$2.40
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 45A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 268-044
  • Mfr. Part No. 3VA5245-7ED41-2AA0
Each
HK$12,053.70
Temporarily out of stock
Eaton 160A Tag Fuse, 100 x 195mm, 690V
  • RS Stock No. 262-018
  • Mfr. Part No. EBH00013TBS5
Each
HK$928.10
Temporarily out of stock
31.5A Cartridge Fuse, 76 x 537mm
  • RS Stock No. 262-389
  • Mfr. Part No. 36TFQSJ31.5
Each
HK$4,408.80
Temporarily out of stock
Schneider Electric 1+N Phase Surge Arrester, 20kA, 1.4kV, DIN Rail Mount
  • RS Stock No. 654-748
  • Mfr. Part No. A9L20500
Each
HK$3,488.69
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-178
  • Mfr. Part No. KV 8104
Each
HK$358.00
Temporarily out of stock
Hager 125A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 250-8658
  • Mfr. Part No. LF599G
Each (In a Pack of 10)
HK$143.681
Temporarily out of stock
Eaton 700A Cartridge Fuse
  • RS Stock No. 261-440
  • Mfr. Part No. BH-3033
Each
HK$5,064.10
In Stock
Schneider Electric PrismaSeT Busbar
  • RS Stock No. 130-540
  • Mfr. Part No. LVS04482
Each
HK$23,825.73
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 116-990
  • Mfr. Part No. KV 9224
Each
HK$1,369.40
1
81
2364
Results per page

Related links