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

2316 of 999+
Currently unavailable
Schneider Electric EasyPact Electronic Circuit Breaker 100A, Fixed
  • RS Stock No. 122-435
  • Mfr. Part No. LV516454
Each
HK$1,296.56
Temporarily out of stock
Eaton xEffect - FRCmM RCCB, 25A, 4 Pole, 300mA, 240/415V ac
  • RS Stock No. 123-619
  • Mfr. Part No. 170447 FRCMM-25/4/03-S/A
Each
HK$2,616.57
Currently unavailable
FUSE 250V IEC TL LBC TR5 SL 6.3A
  • RS Stock No. 565-400
  • Mfr. Part No. 37216300431
Each
HK$1,417.24
Temporarily out of stock
Lovato MCB, 2P, 63A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1668
  • Mfr. Part No. P1MBUL2PC63
Each
HK$1,352.25
Temporarily out of stock
Eaton xEffect MCB, 3P, 63A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3197
  • Mfr. Part No. 278853 FAZ-B63/3
Each
HK$1,427.70
In Stock
Lovato ModuLo P2MB MCB, 3P, 80A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-6169
  • Mfr. Part No. P2MB3PC080
Each
HK$1,217.20
Temporarily out of stock
Eaton xEffect MCB, 4P, 25A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4788
  • Mfr. Part No. 168092 FAZ6-D25/4
Each
HK$1,265.20
In Stock
Legrand DX Range DX3 MCB, 1P, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9663
  • Mfr. Part No. 4 076 55
Each
HK$369.10
In Stock
Eaton xEffect MCB, 3P, 12A Curve B
  • RS Stock No. 230-0877
  • Mfr. Part No. 177587 FAZ6-B12/3
Each
HK$766.57
Temporarily out of stock
Schneider Electric Panelset Busbar
  • RS Stock No. 444-371
  • Mfr. Part No. NSYTBCN3105
Each
HK$17,414.82
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7228
  • Mfr. Part No. 1SDA067268R1 TMG 100-300 XT2 3p
Each
HK$1,940.60
In Stock
Eaton xEffect MCB, 3+N, 15A Curve B
  • RS Stock No. 230-0883
  • Mfr. Part No. 177457 FAZ6-B15/3N
Each
HK$531.78
Temporarily out of stock
Schneider Electric PowerPact Trip Unit for use with Circuit Breaker
  • RS Stock No. 654-717
  • Mfr. Part No. LA11021
Each
HK$5,054.80
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 30A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 341-432
  • Mfr. Part No. NHGL36030
Each
HK$12,813.95
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-676
  • Mfr. Part No. 3VA5560-5EC32-1AA0
Each
HK$25,195.60
Temporarily out of stock
Phoenix Contact PTCB Electronic Circuit Breaker 630mA 24V PTCB E1, 1 channels , DIN Rail
  • RS Stock No. 518-985
  • Mfr. Part No. 1464486
Each
HK$311.70
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-675
  • Mfr. Part No. 3VA6440-8KP41-0AA0
Each
HK$56,501.80
In Stock
Siemens ALPHA Distribution Board, 12 Way
  • RS Stock No. 211-6076
  • Mfr. Part No. 8GB1371-2
Each
HK$965.00
In Stock
Better World
Siemens RCBO, 16A Current Rating, 3P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6210
  • Mfr. Part No. 5SU1336-7FP16
Each
HK$2,219.00
In Stock
Eaton 400A Tag Fuse, 50mm, 1kV
  • RS Stock No. 282-6202
  • Mfr. Part No. FWE-400A
Each
HK$3,258.80
1
2316
2364
Results per page

Related links