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

268 / 999+
In Stock
Wickmann Resettable Fuse, 125V ac/dc
  • RS Stock No. 174-0678
  • Mfr. Part No. 0251004.MRT1L
Each (In a Pack of 10)
MYR3.366
Temporarily out of stock
Eaton 6A Bolted Tag Fuse, 1.2 kV ac, 660V dc, 124mm
  • RS Stock No. 181-8434
  • Mfr. Part No. TAC6
Each (In a Box of 10)
MYR216.564
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0329
  • Mfr. Part No. 8GK1082-3KK21
Each
MYR4,918.74
Temporarily out of stock
ABB Tmax XT Motor Operator for use with Tmax XT
  • RS Stock No. 237-6086
  • Mfr. Part No. 1SDA066468R1 MOE XT2-XT4 480...525VAC
Each
MYR4,238.06
In Stock
Lovato 50A Base Mount Fuse Holder for 14 x 51mm Fuse, 1P, 690V ac
  • RS Stock No. 188-1622
  • Mfr. Part No. FB02A1P
Each
MYR94.77
In Stock
Better World
Schneider Electric TeSys Deca Motor Protection Circuit Breaker - 3 Pole 690V Voltage Rating, 40A Current Rating
  • RS Stock No. 256-4178
  • Mfr. Part No. GV3P401
Each
MYR1,333.36
In Stock
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 239-9966
  • Mfr. Part No. A9DX3640
Each
MYR2,524.01
In Stock
Eaton 63A DIII Bottle Fuse, gR, 500V
  • RS Stock No. 228-893
  • Mfr. Part No. 63D33R FUSE-D2 63A F GR 500VAC E33
1 Pack of 5
MYR325.92
In Stock
Sato Parts 5A PCB Mount Fuse Holder for 5 x 20mm Fuse, 125V ac
  • RS Stock No. 523-4949
  • Mfr. Part No. F-60-C
Each
MYR3.64
In Stock
Eaton 100A Bolted Tag Fuse, A3, 500V ac, 73mm
  • RS Stock No. 181-8663
  • Mfr. Part No. BAO100
Each
MYR107.10
In Stock
Eaton 10A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8620
  • Mfr. Part No. 10NHG000B
Each
MYR30.56
Last RS stock
Eaton EVG 3 Phase Busbar, 415V
  • RS Stock No. 144-282
  • Mfr. Part No. 78623728 EVG-16/3PHAS/6MODUL+ZV-BS-G+FAZ-XK25
Each
MYR121.08
In Stock
ETA Thermal Circuit Breaker - 106-P30 Single Pole 250V Voltage Rating Panel Mount, 3A Current Rating
  • RS Stock No. 335-980
  • Mfr. Part No. 106-P30-000040-3A
Each
MYR137.65
Temporarily out of stock
Schneider Electric Acti9 Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 599-662
  • Mfr. Part No. A9XPH208
1 Pack of 10
MYR824.17
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 50A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 345-144
  • Mfr. Part No. NHJL36050
Each
MYR9,211.68
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-467
  • Mfr. Part No. 3VA6560-7JQ32-0AA0
Each
MYR34,600.57
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA
  • RS Stock No. 209-7046
  • Mfr. Part No. 3VA2025-5KP32-0AA0
Each
MYR5,651.35
Temporarily out of stock
Eaton Eaton xEffect XNH Connection Kit for use with 2/4 Pole NH Fuse Switch, NH00 → 3
  • RS Stock No. 127-230
  • Mfr. Part No. 182999 XNH-XLINK
Each
MYR160.49
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-060
  • Mfr. Part No. 3VA6580-7HN32-0AA0
Each
MYR30,363.76
In Stock
ABB System Pro M Compact S200M MCB, 3P, 20A Curve C, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-4295
  • Mfr. Part No. 2CDS273001R0204 S203M-C20
Each
MYR506.52
1
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