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

160 / 999+
In Stock
RS PRO 12A Slow-Blow Ceramic Cartridge Fuse, 6.35 x 32mm
  • RS Stock No. 180-084
1 Pack of 10
MYR131.23
In Stock
Eaton 250A Centred Tag Fuse, NH1, 690V ac
  • RS Stock No. 182-1387
  • Mfr. Part No. 170M3816D
Each (In a Box of 6)
MYR1,000.672
Currently unavailable
Block PM-0724-400-0
  • RS Stock No. 890-2907
  • Mfr. Part No. PM-0724-400-0
Each
MYR592.95
Temporarily out of stock
Better World
Schneider Electric Compact Nsx, Easypact Cvs Clip for use with Bare Cable Connectors
  • RS Stock No. 221-1155
  • Mfr. Part No. LV429241
Each
MYR134.70
Temporarily out of stock
Schneider Electric A9R RCCB, 63A, 4 Pole, 415V
  • RS Stock No. 245-153
  • Mfr. Part No. A9R61463
Each
MYR7,484.64
Temporarily out of stock
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS3200
  • RS Stock No. 429-419
  • Mfr. Part No. C5EFM
Each
MYR18,664.15
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7454
  • Mfr. Part No. C10V35E100
Each
MYR13,591.14
Temporarily out of stock
Better World
Siemens RCBO, 20A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8776
  • Mfr. Part No. 5SU1654-6KK20
Each
MYR865.51
Temporarily out of stock
Eaton QSA Series Fuse Cover
  • RS Stock No. 244-858
  • Mfr. Part No. 1318476 QSAFCOVER160N1
Each
MYR533.95
In Stock
ABB System Pro M Compact SU200M MCB, 3P, 10A Curve K, 400V AC, 400V DC, 15 kA Breaking Capacity
  • RS Stock No. 231-9760
  • Mfr. Part No. 2CDS273337R0427 SU203M-K10
1 Box of 1
MYR987.19
In Stock
Siemens 3A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 395-503
  • Mfr. Part No. 3NC1003
Each (In a Pack of 10)
MYR125.29
In Stock
Bourns Surge Protector, 50kA, 4kV, DIN Rail Mount
  • RS Stock No. 287-9649
  • Mfr. Part No. 1420A-PV-1500-Y
Each
MYR1,126.21
In Stock
Siemens 160A Centred Tag Fuse, NH000, 250V ac
  • RS Stock No. 203-1972
  • Mfr. Part No. 3NA3836-8
Each (In a Pack of 3)
MYR226.277
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 229-913
  • Mfr. Part No. 113233 NZMC2-4-A160-SVE
Each
MYR7,745.75
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board Enclosure, 34 Way
  • RS Stock No. 339-624
  • Mfr. Part No. SEA9BN8SXS
Each
MYR3,706.74
In Stock
Eaton xEffect MCB, 2P, 6A Curve S, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 532-7647
  • Mfr. Part No. 278809 FAZ-S6/2
Each
MYR426.72
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 1P, 25A Curve K, 230/400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 204-307
  • Mfr. Part No. 2CDS271001R0517
Each
MYR651.18
In Stock
Spelsberg Consumer Unit
  • RS Stock No. 548-8219
  • Mfr. Part No. 735-536/21
Each
MYR625.88
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 654-487
  • Mfr. Part No. C080H350FM
Each
MYR28,407.46
Temporarily out of stock
ABB Tmax XT Front Terminal for use with Tmax XT
  • RS Stock No. 237-6278
  • Mfr. Part No. 1SDA067202R1 FC CuAl 2x150 XT4 8PCS
Each
MYR1,234.14
1
160
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