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

46578 Products showing for Fuses & Circuit Breakers

328 / 999+
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 1P, 4A Curve C, 277V AC
  • RS Stock No. 256-6793
  • Mfr. Part No. M9F52104
Each
MYR614.00
Temporarily out of stock
SENTRON Shunt Trip Voltage Release for use with 3VA4/5/6 Series
  • RS Stock No. 263-867
  • Mfr. Part No. 3VA9978-0BL33
Each
MYR733.29
Temporarily out of stock
ABB AC Switch Disconnectors Accessories Detachable Neutral Clamp for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9706
  • Mfr. Part No. 1SCA104162R1001
Each
MYR1,910.25
Temporarily out of stock
ABB S800U MCB, 1P, 30A Curve K, 240V AC, 30 kA Breaking Capacity
  • RS Stock No. 140-446
  • Mfr. Part No. 2CCS881017R0527
Each
MYR583.31
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 16A, Fixed Mount
  • RS Stock No. 254-6293
  • Mfr. Part No. C10H3TM016
Each
MYR4,176.39
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 70A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-649
  • Mfr. Part No. 3VA5270-6ED31-0AA0
Each
MYR5,431.80
Temporarily out of stock
Siemens 6A Cartridge Fuse
  • RS Stock No. 210-6988
  • Mfr. Part No. 3NW1060-0HG
Each (In a Pack of 10)
MYR123.474
Temporarily out of stock
ABB Tmax XT Undervoltage Release for use with Tmax XT
  • RS Stock No. 236-6864
  • Mfr. Part No. 1SDA069066R1 UVR-C XT2-XT4 W 48VAC/DC
Each
MYR850.20
In Stock
Socomec 160A Neutral Link for Neutral Bar Fuses
  • RS Stock No. 224-2563
  • Mfr. Part No. 64210000
Each
MYR65.18
Temporarily out of stock
ABB 800A Tag Fuse, NH3, 500V
  • RS Stock No. 251-3493
  • Mfr. Part No. 1SCA022627R7240
Each
MYR340.09
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-725
  • Mfr. Part No. KV PC 8109
Each
MYR283.98
In Stock
Mersen 1.6A FA Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 188-6625
  • Mfr. Part No. L084006
Each (In a Pack of 10)
MYR20.037
In Stock
Mersen 250A Rail Mount Fuse Holder for NH1 Fuse, 3P, 690V ac
  • RS Stock No. 768-3772
  • Mfr. Part No. S229878
Each
MYR1,028.94
Temporarily out of stock
Eaton 80A Bolted Tag Fuse, B1, 660 V ac, 350V dc
  • RS Stock No. 182-1659
  • Mfr. Part No. TC80
Each
MYR299.75
In Stock
Better World
Schneider Electric iC60 RCD, 63A, 30mA
  • RS Stock No. 776-2929
  • Mfr. Part No. A9V31463
Each
MYR4,687.78
Temporarily out of stock
Siemens 25A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 1kV
  • RS Stock No. 225-5420
  • Mfr. Part No. 3NW7024-4
Each (In a Pack of 6)
MYR230.89
Temporarily out of stock
ABB S401M MCB, 1P, 20A Curve K, 254V AC, 12V DC, 15 kA Breaking Capacity
  • RS Stock No. 140-783
  • Mfr. Part No. 2CCS571001R0487
Each
MYR258.19
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3697
  • Mfr. Part No. 1SDA071672R1
Each
MYR57,335.46
In Stock
Littelfuse 30A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3150
  • Mfr. Part No. 0KLK030.T
Each
MYR150.07
In Stock
Contactum A Type RCD RCCB, 100A, 4 Pole, 100mA, Type A, 220 → 415V ac
  • RS Stock No. 240-6405
  • Mfr. Part No. CPR100010A
Each
MYR446.92
1
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