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

249 / 999+
In Stock
Siemens 35A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 397-436
  • Mfr. Part No. 3NE8003-1
Each (In a Pack of 3)
MYR367.533
In Stock
Eaton 1.25kA Base Mount Fuse Holder, 1P, 1.4kV
  • RS Stock No. 182-1375
  • Mfr. Part No. 170H3006
Each
MYR1,123.83
Temporarily out of stock
Eaton IZMX16B3-V06W-1 Electronic Circuit Breaker 630A , DIN Rail
  • RS Stock No. 127-711
  • Mfr. Part No. 183341 IZMX16B3-V06W-1
Each
MYR22,699.47
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4796
  • Mfr. Part No. 3VA2510-7HN42-0AA0
Each
MYR43,786.82
Temporarily out of stock
Mersen 25A Slow-Blow Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 247-2868
  • Mfr. Part No. Q213615
1 Box of 10
MYR663.09
In Stock
Mersen 315A NH Fuse, NH2, 500V ac
  • RS Stock No. 136-0602
  • Mfr. Part No. K219820 / NH2GG50V315-1
Each
MYR165.05
Temporarily out of stock
ABB F200 RCCB, 80A, 4 Pole, 30mA, Type A, 277 V ac, 480 V ac
  • RS Stock No. 177-5060
  • Mfr. Part No. 2CSF204401R1800 F204 A-80/0,03 AP-R
Each
MYR2,077.99
In Stock
Eaton PC Board Non Resettable Fuse, Radial 400mA, 250V ac
  • RS Stock No. 769-3343
  • Mfr. Part No. SS-5-400MA-BK
Each (In a Pack of 5)
MYR4.282
In Stock
Schneider Electric A9R1 RCCB, 100A, 4 Pole, 300mA, Type AC, 415V ac
  • RS Stock No. 276-9127
  • Mfr. Part No. A9R14491
Each
MYR3,337.49
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 10A Curve D, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3339
  • Mfr. Part No. A9F85210
Each
MYR539.58
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-540
  • Mfr. Part No. 3VA6580-5JP42-2AA0
Each
MYR40,141.00
In Stock
Mersen 20A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 377-0263
  • Mfr. Part No. B217742
Each (In a Pack of 5)
MYR9.656
Temporarily out of stock
Hager NGN MCB, 2P, 4A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4759
  • Mfr. Part No. NGN204
Each
MYR826.89
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-4864
  • Mfr. Part No. 3VA1110-5EF42-0AA0
Each
MYR3,321.33
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 75 A
  • RS Stock No. 117-267
  • Mfr. Part No. FP 1218
Each
MYR1,193.25
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 250-4056
  • Mfr. Part No. 1SDA054319R1
Each
MYR11,756.28
In Stock
Eaton 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 849-6055
  • Mfr. Part No. GDB-5A
Each (In a Pack of 5)
MYR17.79
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4134
  • Mfr. Part No. 3VA2116-8JP46-0AA0
Each
MYR13,317.32
Temporarily out of stock
Siemens Trunking Unit for use with Busbar
  • RS Stock No. 266-9621
  • Mfr. Part No. BVP:261489
Each
MYR6,017.85
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 231-9343
  • Mfr. Part No. 1SDA100459R1 XT5S630 TMA630-6300 4pFF N
Each
MYR12,968.71
1
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