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

2303 / 999+
Temporarily out of stock
Better World
ABB, XT2L MCCB 3P 100A, Fixed Mount
  • RS Stock No. 236-6492
  • Mfr. Part No. 1SDA067946R1 XT2L 160 Ekip M 100A FF
Each
MYR6,991.84
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 2A Current Rating
  • RS Stock No. 217-6379
  • Mfr. Part No. 2800892
Each
MYR481.28
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4052
  • Mfr. Part No. 3VA2116-0HL46-0AA0
Each
MYR11,149.55
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3834
  • Mfr. Part No. 3VA2063-5JQ46-0AA0
Each
MYR11,016.94
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 169-9552
  • Mfr. Part No. SS-5H-2A-BK
Each (In a Bag of 200)
MYR2.321
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3573
  • Mfr. Part No. 3VA2010-7HM36-0AA0
Each
MYR7,419.61
Temporarily out of stock
Mersen 200A Bolted Tag Fuse, A4X, 240 V dc, 415V ac, 94mm
  • RS Stock No. 178-1050
  • Mfr. Part No. G226303 / BTFP42V200M250
Each (In a Pack of 5)
MYR274.308
In Stock
Bourns 100A Tag Fuse, 38mm, 500V ac, 24.1mm
  • RS Stock No. 254-4196
  • Mfr. Part No. PF-JT3-50
Each (In a Box of 80)
MYR78.334
Temporarily out of stock
Siemens SENTRON Long Rear Connection for use with 3VA2 100/160/250
  • RS Stock No. 269-7116
  • Mfr. Part No. 3VA9204-0QF00
Each (In a Pack of 4)
MYR201.068
Temporarily out of stock
Phoenix Contact Surge Protector, On Base Element Mount
  • RS Stock No. 201-6289
  • Mfr. Part No. 2907840
Each
MYR507.05
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4811
  • Mfr. Part No. 3VA2563-5MQ32-0AA0
Each
MYR23,383.02
Temporarily out of stock
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 50A Curve C, 230V AC, 72V DC
  • RS Stock No. 212-8878
  • Mfr. Part No. 5SL6550-7
Each
MYR444.67
In Stock
Bourns 60A Tag Fuse, 38mm, 170V dc, 24.1mm
  • RS Stock No. 254-4233
  • Mfr. Part No. PF-NT5-60
Each
MYR137.44
In Stock
Bourns Surface Mount Fuse 6A, 50 V dc, 63 V dc
  • RS Stock No. 245-9210
  • Mfr. Part No. SF-0603SPA600R-2
Each
MYR5.52
Temporarily out of stock
Better World
Schneider Electric RCBO, 20A Current Rating, 3P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3318
  • Mfr. Part No. A9DQ3720
Each
MYR4,530.13
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-4425
  • Mfr. Part No. 1SDA072617R1
Each
MYR176,931.60
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4581
  • Mfr. Part No. 3VA2125-7KQ42-0AA0
Each
MYR11,222.79
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA52 250
  • RS Stock No. 269-7162
  • Mfr. Part No. 3VA9253-0JG12
Each (In a Pack of 3)
MYR70.943
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-9531
  • Mfr. Part No. C10R3MA050
Each
MYR5,256.24
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4398
  • Mfr. Part No. 1SDA072580R1
Each
MYR163,921.91
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