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

175 / 999+
In Stock
Eaton 56A British Standard Fuse, ET, 690 V, 700 V, 63.5mm
  • RS Stock No. 182-1411
  • Mfr. Part No. 56ET
Each (In a Box of 10)
MYR79.392
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 244-975
  • Mfr. Part No. SE72B250
Each
MYR6,636.63
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 377-2168P
  • Mfr. Part No. 3821200041
Each (Supplied in a Bag)
MYR7.084
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 2A Curve K, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 514-0096
  • Mfr. Part No. 2CDS251001R0277 S201-K2
Each
MYR216.66
In Stock
RS PRO 30A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-4625
Each
MYR57.30
Temporarily out of stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 16A Curve B, 240V AC, 10000 A Breaking Capacity
  • RS Stock No. 335-288
  • Mfr. Part No. SE10B116
Each
MYR145.11
Temporarily out of stock
Better World
Schneider Electric Compact NSX Terminal Extention for use with circuit breaker
  • RS Stock No. 211-2639
  • Mfr. Part No. LV429221
Each
MYR295.45
In Stock
RS PRO Non Resettable Fuse 2A, 250V ac
  • RS Stock No. 139-954
1 Bag of 10
MYR71.12
Temporarily out of stock
SENTRON Nut Keeper Kit for use with 3VA61/62 Series
  • RS Stock No. 263-996
  • Mfr. Part No. 3VA9243-0QA00
1 Kit
MYR190.66
In Stock
Eaton, xEnergy MCCB 3P 80A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 454-8124
  • Mfr. Part No. 259084 NZMN1-A80
Each
MYR2,753.80
In Stock
ABB 72 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1919
  • Mfr. Part No. 1SL1209A00 65P18X42
Each
MYR883.16
Temporarily out of stock
Siemens Sentron Mounting Adapter for use with Miniature Circuit Breakers
  • RS Stock No. 187-5246
  • Mfr. Part No. 5ST3820-7
Each
MYR49.52
In Stock
RS PRO MCB, 2P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0181
Each
MYR106.99
Temporarily out of stock
Schneider Electric Cross Elbow Busbar Trunking, 250 → 750mm, 400A, Canalis Series
  • RS Stock No. 335-114
  • Mfr. Part No. KSA400DZE41A
Each
MYR10,225.26
In Stock
Littelfuse SMD Non Resettable Fuse 250mA, 32V
  • RS Stock No. 895-1619
  • Mfr. Part No. 0467.250NR
Each (In a Pack of 10)
MYR4.099
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 1A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5992
  • Mfr. Part No. 5SL4601-7
Each
MYR935.41
Temporarily out of stock
Eaton 400A Neutral Link x 130mm
  • RS Stock No. 246-258
  • Mfr. Part No. 1319482 QSANS250/315/400A
Each
MYR896.25
Temporarily out of stock
Hager NGN MCB, 4P, 10A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4774
  • Mfr. Part No. NGN410
Each
MYR1,346.93
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 250A Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3390
  • Mfr. Part No. 1SDA071323R1
Each
MYR38,359.41
Unavailable
Schneider Electric Compact Insulation Monitoring Module for use with Compact Nsx 400/630
  • RS Stock No. 221-1277
  • Mfr. Part No. LV432660
Each
MYR21,376.25
1
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