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

305 / 999+
In Stock
Eaton 200A British Standard Fuse, MT, 690 V, 700 V, 85mm
  • RS Stock No. 182-1378
  • Mfr. Part No. 200MT
Each
MYR339.90
Limited stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 6A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2400
  • Mfr. Part No. M9F23306
Each
MYR543.85
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 16A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5968
  • Mfr. Part No. 5SL4216-7
Each
MYR358.10
In Stock
RS PRO Single Phase Industrial Surge Protector, 50kA, 1.25kV, DIN Rail Mount
  • RS Stock No. 101-800
Each
MYR205.54
Temporarily out of stock
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 339-510
  • Mfr. Part No. SEE120C03
Each
MYR854.22
Temporarily out of stock
Socomec 3 Phase Industrial Surge Protector, 20kA
  • RS Stock No. 224-2520
  • Mfr. Part No. 49873420
Each
MYR597.65
Temporarily out of stock
Eaton 400A Bolted Tag Fuse, 415V ac, 82mm
  • RS Stock No. 181-8601
  • Mfr. Part No. 400PJ30-7
1 Box of 5
MYR1,856.55
Temporarily out of stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 2A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2399
  • Mfr. Part No. M9F23302
Each
MYR781.11
Temporarily out of stock
Legrand DX3 RCD, 63A, 1+N Pole, 30mA, Type A
  • RS Stock No. 732-0092
  • Mfr. Part No. 4 115 56
Each
MYR1,372.50
Temporarily out of stock
ABB Front Terminal for use with S6 630, T6 630
  • RS Stock No. 250-4505
  • Mfr. Part No. 1SDA023389R1
Each
MYR495.85
Temporarily out of stock
Siemens, SENTRON MCCB 4P 110A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-430
  • Mfr. Part No. 3VA5211-6GD41-2AA0
Each
MYR9,262.28
Temporarily out of stock
Eaton NZM DC Link Kit for use with N4-4-(800)(1000)(1250)(1400)-S1(-S15)-DC, N4-4-...-S1(-S15)-PV-NA
  • RS Stock No. 127-216
  • Mfr. Part No. 180020 NZM4-4-XKVI2P
Each
MYR2,440.01
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 500mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-271
  • Mfr. Part No. 3RV2411-0FA15
Each
MYR639.55
In Stock
Schurter SMD Non Resettable Fuse 5A, 125V ac/dc
  • RS Stock No. 131-741
  • Mfr. Part No. 3404.0017.11
Each (In a Pack of 10)
MYR3.591
In Stock
Better World
ABB, XT4S MCCB 3P 80A, Fixed Mount
  • RS Stock No. 236-6744
  • Mfr. Part No. 1SDA068436R1 XT4S 160 MA 80 FF
Each
MYR3,165.08
In Stock
Mersen 315mA FA Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 188-6546
  • Mfr. Part No. Z084018
Each (In a Pack of 10)
MYR19.447
Temporarily out of stock
Hager RCBO, 16A Current Rating, 1P Poles, Type C
  • RS Stock No. 144-4836
  • Mfr. Part No. ADC816F
Each
MYR1,348.45
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 3P, 30A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7128
  • Mfr. Part No. 5SJ4330-7HG41
Each
MYR1,603.97
Temporarily out of stock
ABB Tmax XT Extended Front Terminal for use with Circuit Breaker
  • RS Stock No. 231-9358
  • Mfr. Part No. 1SDA104738R1 ES XT5 3pcs
Each
MYR385.73
In Stock
Better World
Siemens SENTRON 5SY5 MCB, 2P, 20A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 212-8889
  • Mfr. Part No. 5SY5220-7
Each
MYR1,160.98
1
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