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

264 / 999+
In Stock
RS PRO 4.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3420
Each (In a Pack of 10)
MYR2.602
In Stock
ABB RCBO, 25A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5101
  • Mfr. Part No. 2CSR254001R1255
Each
MYR1,970.49
Temporarily out of stock
Schneider Electric RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-9124
  • Mfr. Part No. A9D07210
Each
MYR2,983.13
Temporarily out of stock
Better World
ABB, XT2S MCCB 4P 10A, Fixed Mount
  • RS Stock No. 236-7515
  • Mfr. Part No. 1SDA067833R1 XT2S 160 Ekip LS/I 10A FF
Each
MYR4,115.73
Temporarily out of stock
Eaton BCZ-A Door for use with Distribution Boards
  • RS Stock No. 248-684
  • Mfr. Part No. 101579 BCZ-A-TWS-2/26
Each
MYR414.99
Temporarily out of stock
Siemens SENTRON Retrofit Kit
  • RS Stock No. 277-0939
  • Mfr. Part No. 3WA9111-0EK62
1 Set
MYR1,950.79
In Stock
RS PRO 16A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9298
Each (In a Pack of 10)
MYR5.675
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4834
  • Mfr. Part No. 3VA2563-7MQ32-0AA0
Each
MYR27,092.75
Being discontinued
RS PRO 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-526
Each (In a Pack of 10)
MYR1.676
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 131-627
  • Mfr. Part No. 2906778
Each
MYR559.34
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
  • RS Stock No. 155-864
  • Mfr. Part No. 3VA2440-7KQ32-0AA0
Each
MYR23,909.91
Temporarily out of stock
Schneider Electric Compact Long Rear Connection for use with NS630b
  • RS Stock No. 341-038
  • Mfr. Part No. 33617
Each
MYR3,123.29
Temporarily out of stock
ABB Tmax XT Motor Operator for use with MCCB
  • RS Stock No. 231-9361
  • Mfr. Part No. 1SDA104885R1 MOE XT5 220...250V AC/DC
Each
MYR4,981.92
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4738
  • Mfr. Part No. 3VA2163-7HL42-0AA0
Each
MYR5,432.32
Temporarily out of stock
Weidmüller Surge Arrester, 15kA, 1500V dc, Screw Mount Mount
  • RS Stock No. 285-5291
  • Mfr. Part No. 2755990000
Each
MYR1,932.25
In Stock
Hager Vega D
  • RS Stock No. 144-4601
  • Mfr. Part No. FD00S4
Each
MYR341.72
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 50A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-7931
  • Mfr. Part No. LV426721
Each
MYR5,750.25
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 25A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-9029
  • Mfr. Part No. 5SY7525-6
Each
MYR393.24
Temporarily out of stock
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4784
  • Mfr. Part No. 3VA2510-6JP32-0AA0
Each
MYR34,680.94
In Stock
Legrand 4A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 266-3131
  • Mfr. Part No. 0 143 04
1 Box of 10
MYR207.92
1
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