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

2340 of 999+
Temporarily out of stock
Better World
Schneider Electric, Masterpact MCCB 4P 4kA, Fixed Mount
  • RS Stock No. 248-3791
  • Mfr. Part No. LV848097
Each
HK$354,291.48
Temporarily out of stock
Better World
Schneider Electric Acti9 iTG40 RCCB, 40A, 3+N Pole, 30mA, Type AC, 400V ac
  • RS Stock No. 238-3497
  • Mfr. Part No. A9Y14740
Each
HK$4,556.37
Temporarily out of stock
Better World
Schneider Electric Vigi iTG40 RCD, 63A, 4 Pole, 30mA
  • RS Stock No. 191-6140
  • Mfr. Part No. A9Y14463
Each
HK$7,436.99
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 156-828
  • Mfr. Part No. 3VA2216-5HM42-0AA0
Each
HK$19,524.40
Temporarily out of stock
Legrand Single Phase Surge Arrester, 40kA, 2.5kV, DIN Rail Mount
  • RS Stock No. 266-1368
  • Mfr. Part No. 412214
Each
HK$7,479.36
Temporarily out of stock
Eaton Eaton Moeller xPole 2 Phase Busbar, 500V
  • RS Stock No. 245-845
  • Mfr. Part No. 132659 EVG-2PHAS/20MODUL
Each
HK$152.53
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 3P, 500mA Curve C
  • RS Stock No. 216-4775
  • Mfr. Part No. 5SL6305-7
Each
HK$777.70
In Stock
Eaton xEffect MCB, 3P, 25A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3150
  • Mfr. Part No. 278849 FAZ-B25/3
Each
HK$814.90
Limited stock
SIBA 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 783-3223
  • Mfr. Part No. 70-007-33/0.63A
Each (In a Pack of 10)
HK$3.38
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 9 kA, Plug In
  • RS Stock No. 231-669
  • Mfr. Part No. 110895 NZMH3-AE400-T
Each
HK$29,008.88
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 3 channels Type N
  • RS Stock No. 157-130
  • Mfr. Part No. 3VA2163-5HK36-0AA0
Each
HK$5,883.00
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-4180
  • Mfr. Part No. 1SDA072296R1
Each
HK$67,149.32
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 260-7691
  • Mfr. Part No. C12F4TM125B
Each
HK$8,930.76
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-843
  • Mfr. Part No. 3VA6440-6KT41-0AA0
Each
HK$37,299.70
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 1A Curve D, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 247-140
  • Mfr. Part No. 102178 FAZ-D1/2-NA
Each
HK$1,562.52
In Stock
Better World
Schneider Electric Acti 9 IC60L MCB, 3P, 20A Curve K, 400V AC, 180V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0146
  • Mfr. Part No. A9F95320
Each
HK$2,452.64
Temporarily out of stock
Siemens 25A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2040
  • Mfr. Part No. 3NW3250-0HG
Each (In a Pack of 10)
HK$264.65
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 25A 3VA2, 4 channels
  • RS Stock No. 157-202
  • Mfr. Part No. 3VA2125-8KQ46-0AA0
Each
HK$24,773.70
Temporarily out of stock
ABB Tmax Rear Terminal for use with Tmax T
  • RS Stock No. 237-5997
  • Mfr. Part No. 1SDA060427R1 R T6 6PCS
Each
HK$2,635.41
In Stock
Littelfuse Blade Fuse Kit
  • RS Stock No. 820-7287
  • Mfr. Part No. 00940510ZXGLOA
Each
HK$1,351.70
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