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

271 / 999+
Temporarily out of stock
ABB S-ARC1 MCB, 1+N, 16A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 175-9928
  • Mfr. Part No. 2CSA255901R9164 S-ARC1 C16
Each
MYR1,068.90
In Stock
Legrand VX 1 Phase Busbar, 230V, 125mm Pitch
  • RS Stock No. 786-5683
  • Mfr. Part No. 4 050 01
Each
MYR243.28
Last RS stock
Mersen Surge Protector
  • RS Stock No. 179-3058
  • Mfr. Part No. 83020106 / STPT2-40K275V-1P
Each
MYR244.54
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 16A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-756
  • Mfr. Part No. 3RV2421-4AA20
Each
MYR650.39
Temporarily out of stock
32A Tag Fuse, 31 x 110mm, 415V
  • RS Stock No. 262-978
  • Mfr. Part No. 32MJ30-8
1 Pack of 10
MYR2,266.33
In Stock
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 1P, 600V
  • RS Stock No. 299-082
  • Mfr. Part No. 1SNF100031R0000
Each
MYR30.00
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7265
  • Mfr. Part No. 1SDA067345R1 Ekip LSI In=160A XT2 4p
Each
MYR6,538.36
Temporarily out of stock
Eaton RCBO, 25A Current Rating, 2P Poles, 10mA Trip Sensitivity, Type A, Type C, FRBdM Range
  • RS Stock No. 121-253
  • Mfr. Part No. 168257 FRBDM-C25/1N/001-G/A
Each
MYR1,062.30
In Stock
Eaton Moeller xPole 3 Phase Busbar, 500V
  • RS Stock No. 252-823
  • Mfr. Part No. 215639 EVG-3PHAS/12MODUL
Each
MYR57.68
Temporarily out of stock
Siemens SENTRON Option Plug
  • RS Stock No. 277-0903
  • Mfr. Part No. 3WA9111-0EB08
Each
MYR753.57
Temporarily out of stock
Schneider Electric RCBO, 25A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-084
  • Mfr. Part No. A9D05825
Each
MYR988.53
In Stock
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 221-5605
  • Mfr. Part No. 3-128-215
Each
MYR112.87
In Stock
Eaton Fuse Holder Trip Indicator Kit
  • RS Stock No. 182-1510
  • Mfr. Part No. MC-250
Each
MYR145.89
Temporarily out of stock
ABB 40A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 251-3432
  • Mfr. Part No. 1SCA022627R1120
1 Box of 9
MYR243.35
In Stock
Schurter SMD Non Resettable Fuse 10A, 63V ac/dc
  • RS Stock No. 782-3721
  • Mfr. Part No. 3402.0040.11
Each (In a Pack of 10)
MYR3.591
Temporarily out of stock
ABB RCBO, 63A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5129
  • Mfr. Part No. 2CSR254101R1634
Each
MYR2,744.83
Temporarily out of stock
ABB Electronic Circuit Breaker 2A 24V EPD24, DIN Rail Mount
  • RS Stock No. 914-4604
  • Mfr. Part No. 2CDE601101R2002 EPD24-TB-101-2A
Each
MYR773.31
In Stock
ABB S-ARC1 MCB, 1+N, 10A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 175-9924
  • Mfr. Part No. 2CSA255901R9104 S-ARC1 C10
Each
MYR1,053.44
In Stock
Eaton 32A British Standard Fuse, ET, 690 V, 700 V, 63.5mm
  • RS Stock No. 182-1457
  • Mfr. Part No. 32ET
Each (In a Box of 10)
MYR98.417
In Stock
Bourns 1.1A Resettable Fuse, 72V
  • RS Stock No. 647-8673
  • Mfr. Part No. MF-RX110/72-0
Each (In a Pack of 10)
MYR1.733
1
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