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

139 / 999+
In Stock
Hager 10A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 250-8603
  • Mfr. Part No. LF310PV
Each (In a Pack of 10)
MYR87.341
Temporarily out of stock
Bourns 20A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 254-4182
  • Mfr. Part No. PF-HT1-20
Each (In a Tray of 50)
MYR128.334
In Stock
ETA ESX10 Electronic Circuit breaker 16A 24V ESX10, 1 channels , Plug-In Mounting
  • RS Stock No. 210-2116
  • Mfr. Part No. ESX10-100-DC24V-16A-E
Each
MYR505.23
Temporarily out of stock
Hager NGT MCB, 3+N, 10A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4803
  • Mfr. Part No. NGT810
Each
MYR1,305.95
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 2A Curve B, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3373
  • Mfr. Part No. A9F73202
Each
MYR930.61
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 25 kA
  • RS Stock No. 210-1642
  • Mfr. Part No. 3VA1125-3EE32-0AA0
Each
MYR1,739.51
In Stock
Better World
Siemens 5SV3 RCCB, 63A, 4 Pole, 30mA, Type A
  • RS Stock No. 124-7735
  • Mfr. Part No. 5SV3346-6KL
Each
MYR850.84
In Stock
Eaton 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-8639
  • Mfr. Part No. S500-315-R
Each (In a Pack of 10)
MYR2.237
Temporarily out of stock
Siemens Sentron Adapter for use with Busbar
  • RS Stock No. 228-8243
  • Mfr. Part No. 8US1213-4AQ03
Each
MYR1,406.23
In Stock
Mersen 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 189-5342
  • Mfr. Part No. G1062790 / CUSCC3
Each
MYR261.35
In Stock
Siemens 125A Centred Tag Fuse, NH00, 500V ac
  • RS Stock No. 203-2107
  • Mfr. Part No. 3NA7832
Each (In a Pack of 3)
MYR39.723
In Stock
Eaton 250A NH Fuse, NH1, 500V
  • RS Stock No. 703-8715
  • Mfr. Part No. 250NHG1B
Each
MYR72.40
Temporarily out of stock
Better World
ABB, XT2L MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-7567
  • Mfr. Part No. 1SDA067923R1 XT2L 160 Ekip I 160A FF
Each
MYR4,818.32
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 40A Curve C, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3445
  • Mfr. Part No. A9F54440
Each
MYR1,306.66
In Stock
Eaton xEffect MCB, 1P, 10A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 624-0333
  • Mfr. Part No. 278557 FAZ-C10/1
Each
MYR101.42
In Stock
Legrand 1A M Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 266-3077
  • Mfr. Part No. 0 120 01
1 Box of 10
MYR115.47
In Stock
Siemens 425A Centred Tag Fuse, NH3, 500V ac
  • RS Stock No. 203-2018
  • Mfr. Part No. 3NA3362
Each (In a Pack of 3)
MYR223.95
Temporarily out of stock
Eaton Memshield 3 3 Phase Distribution Board, 6 Way, 125 A
  • RS Stock No. 124-3005
  • Mfr. Part No. EBM61 EBM61
Each
MYR2,265.23
Temporarily out of stock
WJ Furse Copper Earth Bar L. 800mm x W. 90mm x H. 96mm 10 Ways
  • RS Stock No. 124-2506
  • Mfr. Part No. 7TCA083670R0603 LK207-10
Each
MYR1,907.28
Temporarily out of stock
Mersen Surge Protector
  • RS Stock No. 179-3079
  • Mfr. Part No. 83230000 / SP23-20K-N
Each
MYR198.51
1
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