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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

91 / 999+
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 25A Curve D, 277V AC
  • RS Stock No. 256-6819
  • Mfr. Part No. M9F53225
Each
MYR1,103.38
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 55 kA
  • RS Stock No. 209-6884
  • Mfr. Part No. 3VA1340-5EF32-0AA0
Each
MYR6,650.95
ABB S302 MCB, 2P, 500mA Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-306
  • Mfr. Part No. 2CDS382001R0984
Each
MYR1,514.97
Schurter 50A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 209-9427
  • Mfr. Part No. 8020.2055
Each (In a Pack of 10)
MYR72.393
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 232-0087
  • Mfr. Part No. 1SDA054349R1 T5H400 FF PR221-LS 400A
Each
MYR8,557.72
Littelfuse 200A Blue Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4410
  • Mfr. Part No. 0298200.ZXEH
Each
MYR28.02
Martindale Drummond Busbar Connector, 600V ac
  • RS Stock No. 122-5529
  • Mfr. Part No. GCK/F/GKIT1
Each
MYR957.46
Eaton 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8500P
  • Mfr. Part No. C10M10
Each (Supplied in a Box)
MYR8.104
Eaton 800mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9438
  • Mfr. Part No. S501-800-R
1 Bag of 1000
MYR1,401.40
Eaton 630A Centred Tag Fuse, NH3, 500V ac
  • RS Stock No. 703-8768P
  • Mfr. Part No. 630NHG3B
Each (Supplied in a Box)
MYR170.34
Better World
ABB, Tmax XT MCCB 4P 10A, Fixed Mount
  • RS Stock No. 236-7547
  • Mfr. Part No. 1SDA067896R1 XT2H 160 Ekip I 10A FF
Each
MYR5,033.35
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-384
  • Mfr. Part No. 3VA5140-6EC31-0AA0
Each
MYR2,359.59
Littelfuse 200mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4303
  • Mfr. Part No. 0217.200MXP
Each (In a Pack of 10)
MYR3.914
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC 2 Pole 65V dc Voltage Rating DIN Rail, 5A Current Rating
  • RS Stock No. 135-506
  • Mfr. Part No. 0914853
1 Pack of 3
MYR2,463.86
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 25 kA
  • RS Stock No. 209-6769
  • Mfr. Part No. 3VA1120-3EF42-0AA0
Each
MYR2,134.24
Mersen 1.6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 136-0567
  • Mfr. Part No. N090517 / MI5SF25V1,6
Each (In a Pack of 10)
MYR2.99
Mersen 15A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4367
  • Mfr. Part No. ATM15
Each
MYR73.90
Better World
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-7452
  • Mfr. Part No. 1SDA067714R1 XT2V 160 TMA 125A FF
Each
MYR6,554.10
Eaton 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1492
  • Mfr. Part No. S505-5-R
Each (In a Pack of 10)
MYR12.283
Eaton 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9403
  • Mfr. Part No. S500-1.25-R
1 Bag of 1000
MYR1,035.50
1
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