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

123 of 999+
In Stock
Siemens 3A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 395-503
  • Mfr. Part No. 3NC1003
Each (In a Pack of 10)
HK$212.80
Temporarily out of stock
Schneider Electric A9R RCCB, 40A, 4 Pole, 30mA, Type AC, 380 → 415V ac
  • RS Stock No. 655-156
  • Mfr. Part No. A9R41440
Each
HK$2,435.37
Temporarily out of stock
Schneider Electric MasterPact Connection Unit for use with MTZ1 06-16
  • RS Stock No. 212-066
  • Mfr. Part No. LV833727
Each
HK$2,902.01
Temporarily out of stock
Siemens SENTRON 5SJ4240 MCB, 2P, 40A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-971
  • Mfr. Part No. 5SJ4240-8HG41
Each
HK$2,373.10
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 40A 3VA2, 3 channels
  • RS Stock No. 157-111
  • Mfr. Part No. 3VA2140-5JP36-0AA0
Each
HK$11,646.10
In Stock
WAGO 30A Fuse Holder for 10 x 38mm Fuse, 1P, 600V ac
  • RS Stock No. 279-1655
  • Mfr. Part No. 811-411
Each
HK$264.50
In Stock
ABB System Pro M Compact S200 MCB, 1P, 10A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-6836
  • Mfr. Part No. 2CDS251001R0104 - S201C10
Each
HK$186.50
In Stock
Legrand 25A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6121
  • Mfr. Part No. 0 133 25
Each (In a Box of 10)
HK$16.85
In Stock
Schneider Electric R9PR RCCB, 63A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 276-8974
  • Mfr. Part No. R9PRA463
Each
HK$3,683.88
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA, Cable Mount
  • RS Stock No. 249-131
  • Mfr. Part No. 3VA6610-6HL46-0AA0
Each
HK$83,371.50
In Stock
Schurter 8A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 269-3788
  • Mfr. Part No. 0034.1525
Each
HK$1.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 63A, Breaking Capacity 2.5 kA
  • RS Stock No. 159-527
  • Mfr. Part No. 3VA2163-5HL32-0AA0
Each
HK$5,491.10
Temporarily out of stock
Eaton 16A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8532
  • Mfr. Part No. ESD16
1 Box of 20
HK$862.28
In Stock
Littelfuse SMD Non Resettable Fuse 1A, 250V
  • RS Stock No. 787-4322
  • Mfr. Part No. 0464001.DR
Each (In a Pack of 5)
HK$9.20
In Stock
Schurter SMD Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 600-7394
  • Mfr. Part No. 3410.0027.01
Each (In a Pack of 20)
HK$25.00
In Stock
ETA Thermal Magnetic Circuit Breaker - 2210 Single Pole DIN Rail Mount, 1A Current Rating
  • RS Stock No. 282-8743
  • Mfr. Part No. 2210-T210-K0M1-H121-1A
Each
HK$428.00
Temporarily out of stock
Phoenix Contact 2A F Cartridge Fuse, 5 x 20mm
  • RS Stock No. 254-4835
  • Mfr. Part No. 2939027
Each (In a Pack of 10)
HK$5.60
Temporarily out of stock
Legrand Single Phase Surge Arrester, 40kA, 1.7kV, DIN Rail Mount
  • RS Stock No. 266-1370
  • Mfr. Part No. 412299
Each
HK$1,438.23
Temporarily out of stock
Eaton 63A Neutral Link x 57mm
  • RS Stock No. 244-873
  • Mfr. Part No. 1319462 QSANS40/63A
Each
HK$1,674.13
Temporarily out of stock
Schneider Electric, PowerPact MCCB 4P 100A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-819
  • Mfr. Part No. BJF46100
Each
HK$16,210.28
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