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

2357 of 999+
Temporarily out of stock
Eaton PLSM MCB, 2P, 1A Curve C
  • RS Stock No. 230-1321
  • Mfr. Part No. 242390 PLSM-C1/2-MW
Each
HK$1,497.20
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-8052
  • Mfr. Part No. C25W42D100
Each
HK$34,213.29
Temporarily out of stock
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4861
  • Mfr. Part No. 3VA2580-7HM42-0AA0
Each
HK$101,487.00
Temporarily out of stock
80A Tag Fuse, 1.5kV ac
  • RS Stock No. 263-398
  • Mfr. Part No. TFC80
Each
HK$2,647.30
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-7604
  • Mfr. Part No. C11F4TM040B
Each
HK$5,941.79
Temporarily out of stock
63A Cartridge Fuses, 76.2 x 565mm
  • RS Stock No. 253-511
  • Mfr. Part No. 24AFIHA63
Each
HK$11,423.70
Temporarily out of stock
ABB S403M MCB, 4P, 63A Curve D, 12V AC, 10 kA Breaking Capacity
  • RS Stock No. 140-639
  • Mfr. Part No. 2CCS573103R8631
Each
HK$6,447.89
Temporarily out of stock
Eaton 630A Cartridge Fuse, 84 x 200mm
  • RS Stock No. 261-423
  • Mfr. Part No. TLU630
Each
HK$17,130.50
In Stock
Sato Parts 10A Rail Mount Fuse Holder for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse, 1P, 250V
  • RS Stock No. 229-4965
  • Mfr. Part No. F-700-A
Each
HK$27.17
Temporarily out of stock
Eaton Electronic Circuit Breaker 100A xEffect SASY, Busbar System
  • RS Stock No. 103-924
  • Mfr. Part No. 139533 FCFSDNH000BBC60-3
Each
HK$999.05
Temporarily out of stock
Eaton Eaton Moeller xEffect Busbar, 30V dc, 17.5mm Pitch
  • RS Stock No. 261-669
  • Mfr. Part No. PXS24BB00008 PXS24-BB/80A/8TE
Each
HK$41.90
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 251-130
  • Mfr. Part No. 192362 NZMH3-PX630
Each
HK$43,280.90
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 255-371
  • Mfr. Part No. 265743 NZMH2-S50
Each
HK$4,562.00
Temporarily out of stock
250A Fuse Holder for 162 x 103 x 675mm Fuse, 3P, 690V ac
  • RS Stock No. 263-160
  • Mfr. Part No. EBF1330M1
Each
HK$1,679.10
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-9541
  • Mfr. Part No. C10R45E040
Each
HK$25,477.28
Temporarily out of stock
Lovato Single Phase Replacement cartridge, 40kA, DIN Rail Mount
  • RS Stock No. 248-5674
  • Mfr. Part No. SGX02DGK10M3
Each
HK$618.95
Temporarily out of stock
400A Fuse Holder for 162 x 103 x 675mm Fuse, 3P, 690V ac
  • RS Stock No. 262-620
  • Mfr. Part No. EBF2330M1
Each
HK$1,895.40
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 6 kA, Fixed Mount
  • RS Stock No. 251-128
  • Mfr. Part No. 192359 NZMS3-PX630
Each
HK$39,702.20
Temporarily out of stock
160A Cartridge Fuses, 76 x 292mm
  • RS Stock No. 262-319
  • Mfr. Part No. 7.2MRLSA160
Each
HK$11,083.80
Temporarily out of stock
Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 253-190
  • Mfr. Part No. 192364 NZMN3-PX400-BT
Each
HK$32,182.70
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