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

43 of 999+
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0088
  • Mfr. Part No. 1SDA054396R1 T5N630 FF PR221-LS 630A
Each
HK$15,115.30
ABB MCCB Molded Case Circuit Breaker 3P+N 320A, Fixed Mount
  • RS Stock No. 250-4167
  • Mfr. Part No. 1SDA054438R1
Each
HK$36,339.14
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 866-3422
  • Mfr. Part No. 0031.1653
Each (In a Pack of 100)
HK$12.708
Wickmann Panel Mount Fuse Holder
  • RS Stock No. 174-0734
  • Mfr. Part No. 03420004HXL
Each (In a Pack of 5)
HK$27.94
Eaton 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3838
  • Mfr. Part No. GDC-5A
Each
HK$56.28
Siemens Auxiliary Contact, 6 Contact, 2NC + 4NO, Side Mount, SENTRON
  • RS Stock No. 874-4534
  • Mfr. Part No. 3VA9988-0AA11
Each
HK$280.80
Littelfuse Non-Resettable Wire Ended Fuse 375mA, 125V ac/dc
  • RS Stock No. 738-3065
  • Mfr. Part No. 0251.375MRT1L
Each (In a Pack of 10)
HK$9.26
ETI 6A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-830
  • Mfr. Part No. 2311403
Each (In a Pack of 5)
HK$9.32
Better World
Schneider Electric Multi 9 C60N MCB, 3P, 20A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2072
  • Mfr. Part No. M9F11320
Each
HK$867.20
Schneider Electric Acti 9 Acti9 iDT40N XA MCB, 3+N, 40A Curve C, 400V AC
  • RS Stock No. 238-3439
  • Mfr. Part No. A9PA4740
Each
HK$2,025.30
Better World
Schneider Electric Acti9 iIG40K RCCB, 40A, 3+N Pole, 300mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3478
  • Mfr. Part No. A9R79740
Each
HK$2,943.20
Schneider Electric, ComPacT MCCB 4P 200A, Fixed Mount
  • RS Stock No. 260-7989
  • Mfr. Part No. C25R4TM200
Each
HK$29,434.33
Schneider Electric, ComPacT New Generation MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7812
  • Mfr. Part No. C16N44V100
Each
HK$25,810.77
Better World
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator
  • RS Stock No. 219-8902
  • Mfr. Part No. KNB50SN4
Each
HK$3,013.15
Schneider Electric Acti9 Remote Control System for use with iC60 Circuit Breakers
  • RS Stock No. 276-1538
  • Mfr. Part No. A9C70124
Each
HK$4,971.00
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9649
  • Mfr. Part No. 3VA11103GD460AA0
Each
HK$5,402.20
Eaton 100A Stud Mount Bolt Down Fuse Block, 600V
  • RS Stock No. 852-7562
  • Mfr. Part No. 1BS101
Each
HK$1,546.50
Schneider Electric Acti9 A9F MCB, 1P, 6A Curve B, 220-240V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 288-7082
  • Mfr. Part No. A9F93106
Each
HK$403.80
Better World
Schneider Electric RCBO, 32A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type B, Square D Range
  • RS Stock No. 247-2228
  • Mfr. Part No. QO132B10RCBO30F
Each
HK$3,884.50
Panasonic SMD Non Resettable Fuse 2A, 32V dc
  • RS Stock No. 759-4751
  • Mfr. Part No. ERBRD2R00X
Each (In a Pack of 10)
HK$1.62
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