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

320 / 999+
In Stock
Eaton 1.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-2999
  • Mfr. Part No. GMA-1-5-R
Each
MYR2.05
Limited stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 10A Curve B, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2118
  • Mfr. Part No. A9F06210
Each
MYR354.35
In Stock
Better World
ABB Compact Home SH200 MCB, 1P, 4A Curve C, 253V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9652
  • Mfr. Part No. 2CDS211001R0044 SH201-C 4
1 Box of 1
MYR100.29
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P+N 320A, Fixed Mount
  • RS Stock No. 250-4178
  • Mfr. Part No. 1SDA054450R1
Each
MYR23,631.66
Temporarily out of stock
Legrand DX3 Circuit Breaker, 2P, 32A Curve C, 400V AC, 50 kA Breaking Capacity
  • RS Stock No. 266-1349
  • Mfr. Part No. 410151
Each
MYR2,110.72
Temporarily out of stock
Siemens 400V (Volts) Undervoltage Release Circuit Trip for use with Circuit Breaker 3RV1011
  • RS Stock No. 231-3560
  • Mfr. Part No. 3RV1912-1CV0
Each
MYR319.54
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 25A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-5962
  • Mfr. Part No. 5SL4125-7
Each
MYR121.26
In Stock
Better World
Schneider Electric Cable Connector for use with Compact Nsx, Compact Nsx Dc
  • RS Stock No. 221-1247
  • Mfr. Part No. LV432523
Each
MYR197.71
Temporarily out of stock
Schneider Electric Acti9 Acti9 iC60 MCB, 1P, 20A Curve B, 500V AC, 15000 A Breaking Capacity
  • RS Stock No. 346-787
  • Mfr. Part No. A9F93120
Each
MYR998.96
Limited stock
nVent ERICO Neutral Double Busbar Busbar
  • RS Stock No. 646-813
  • Mfr. Part No. 568720
Each
MYR44.76
In Stock
Littelfuse SMD Non Resettable Fuse 80mA, 125V
  • RS Stock No. 738-2964
  • Mfr. Part No. 0451.080MRL
Each (In a Pack of 10)
MYR17.632
In Stock
Better World
Siemens Sentron 5SL4 MCB, 2P, 4A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 196-3589
  • Mfr. Part No. 5SL4204-8
Each
MYR568.42
In Stock
Hager NFN MCB, 2P, 16A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4713
  • Mfr. Part No. NFN216
Each
MYR469.31
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4605
  • Mfr. Part No. 3VA2140-0KP32-0AA0
Each
MYR9,867.55
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 6A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-1958
  • Mfr. Part No. 5SY4106-6
Each
MYR117.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-601
  • Mfr. Part No. 3VA6115-5KQ31-0AA0
Each
MYR14,883.13
In Stock
Eaton xEffect MCB, 1P, 10A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6961
  • Mfr. Part No. 278531 FAZ-B10/1
Each
MYR172.12
In Stock
Schneider Electric 440V ac Circuit Breaker Circuit Trip for use with Circuits
  • RS Stock No. 130-747
  • Mfr. Part No. C12E34V160L
Each
MYR13,032.70
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 2P, 690 V ac → 1kV ac/dc
  • RS Stock No. 189-5339
  • Mfr. Part No. D1062718 / CUS102
Each
MYR123.10
Temporarily out of stock
Schneider Electric ComPacT Thermal Magnetic Release for use with Distribution
  • RS Stock No. 119-293
  • Mfr. Part No. C106TM032
Each
MYR820.12
1
320
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