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

204 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 36 kA
  • RS Stock No. 210-1611
  • Mfr. Part No. 3VA1110-4EE32-0AA0
Each
HK$3,940.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 32A, Breaking Capacity 36 kA
  • RS Stock No. 209-6798
  • Mfr. Part No. 3VA1132-4EF32-0AA0
Each
HK$3,396.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA
  • RS Stock No. 209-6922
  • Mfr. Part No. 3VA2125-6HN46-0AA0
Each
HK$10,218.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3716
  • Mfr. Part No. 3VA2025-8KP32-0AA0
Each
HK$18,296.50
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3724
  • Mfr. Part No. 3VA2025-8KQ46-0AA0
Each
HK$23,049.80
Temporarily out of stock
Better World
Siemens, 3VA2 MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-3344
  • Mfr. Part No. 3VA2163-6HL36-0AA0
Each
HK$7,088.10
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 25 kA
  • RS Stock No. 209-6793
  • Mfr. Part No. 3VA1132-3EE42-0AA0
Each
HK$3,862.50
Temporarily out of stock
160A Base Mount Fuse Holder, 3P, 690V
  • RS Stock No. 261-940
  • Mfr. Part No. TD00-D 690V 160A 3 POLE BASE NH00
Each
HK$235.90
Temporarily out of stock
160A Tag Fuse, 110 x 210mm, 690V
  • RS Stock No. 263-167
  • Mfr. Part No. EBH0013TTF
Each
HK$1,004.30
In Stock
ETA Thermal Circuit Breaker - 1410-G1 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 729-2723
  • Mfr. Part No. 1410-G111-P2F1-S01-10A
Each
HK$151.20
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 7 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-263
  • Mfr. Part No. 3VA5112-5GC41-0AA0
Each
HK$6,185.70
In Stock
Lovato ModuLo P1MB MCB, 2P, 10A Curve C, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5716
  • Mfr. Part No. P1MB2PC10
Each
HK$368.00
Limited stock
ETA Thermal Circuit Breaker - 8340 Single Pole 80V dc Voltage Rating Flange Mount, 20A Current Rating
  • RS Stock No. 407-0766
  • Mfr. Part No. 8340-F410-P1M1-A3H0-20A
Each
HK$672.00
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 16A Curve C, 400V AC
  • RS Stock No. 239-9969
  • Mfr. Part No. A9P22316
Each
HK$851.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA
  • RS Stock No. 209-6849
  • Mfr. Part No. 3VA1163-5ED32-0AA0
Each
HK$3,081.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3909
  • Mfr. Part No. 3VA2063-8KP32-0AA0
Each
HK$18,296.50
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 3P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6016
  • Mfr. Part No. 3VA1140-5EF42-0AA0
Each
HK$4,851.90
Temporarily out of stock
SENTRON Undervoltage Release for use with 3VA4/5/6 Series
  • RS Stock No. 263-575
  • Mfr. Part No. 3VA9978-0BB27
Each
HK$1,113.40
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 500mA, Type Z, 440V AC
  • RS Stock No. 246-2468
  • Mfr. Part No. 2CCS562001R1988
Each
HK$1,687.51
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 10A Curve B, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2339
  • Mfr. Part No. M9F21210
Each
HK$330.40
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