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

136 / 999+
In Stock
Schneider Electric RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A-SI, Acti9 Range
  • RS Stock No. 276-8719
  • Mfr. Part No. A9D27216
Each
MYR3,383.38
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 30A Curve C, 500V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3216
  • Mfr. Part No. A9N61534
Each
MYR774.46
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 600A, Breaking Capacity 100 kA, DIN Rail Mount
  • RS Stock No. 245-056
  • Mfr. Part No. NLJF36600U53XTW
Each
MYR29,243.35
In Stock
Eaton 500mA Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8364
  • Mfr. Part No. C10G0-5
Each (In a Pack of 10)
MYR8.281
Temporarily out of stock
Siemens SENTRON 5SJ MCB, 2P, 2A
  • RS Stock No. 232-2247
  • Mfr. Part No. 5SJ4202-7HG42
Each
MYR799.00
In Stock
Socomec 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 1P, 690V
  • RS Stock No. 233-3331
  • Mfr. Part No. 57025011
Each (In a Pack of 6)
MYR166.913
In Stock
Eaton Handle, Lockable for use with N(S)2(-4) Series, NZM2(-4) Series, PN2(-4) Series
  • RS Stock No. 537-5725
  • Mfr. Part No. 260180 NZM2-XTVDVR
Each
MYR503.01
In Stock
Siemens 35A DIII Diazed Fuse, E33 Thread Size, gR, 500V
  • RS Stock No. 203-3951
  • Mfr. Part No. 5SD450
Each (In a Pack of 5)
MYR76.808
Currently unavailable
Better World
Schneider Electric, NSX Range MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 849-3964
  • Mfr. Part No. LV429632
Each
MYR1,982.13
Temporarily out of stock
Lovato P1RD MCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 276-5662
  • Mfr. Part No. P1RD2P25A030
Each
MYR982.25
In Stock
Mersen 125A NH Fuse, NH00, 500V ac
  • RS Stock No. 270-3121
  • Mfr. Part No. V200808
Each
MYR69.38
In Stock
SIBA 10A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3470
  • Mfr. Part No. 70-010-05/10A
Each (In a Pack of 5)
MYR22.378
In Stock
Siemens SENTRON Busbar Protector for use with Pin Busbar
  • RS Stock No. 202-7253
  • Mfr. Part No. 5ST3655-0HG
Each (In a Pack of 10)
MYR17.534
In Stock
Mersen 160A NH Fuse, NH00, 690V ac
  • RS Stock No. 377-0178
  • Mfr. Part No. J322169
Each
MYR423.16
In Stock
Eaton RCCB, 40A, 4 Pole, 100mA, Type A, 230/400V ac
  • RS Stock No. 922-8673
  • Mfr. Part No. 235440 PFIM-40/4/01-A-MW
Each
MYR1,067.48
In Stock
Littelfuse 0.75A Resettable Fuse, 13.2V dc
  • RS Stock No. 517-7127
  • Mfr. Part No. MINISMDC075F-2
Each (In a Pack of 10)
MYR1.247
In Stock
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 2.5A Current Rating
  • RS Stock No. 405-9129
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-2.5A
Each
MYR172.64
In Stock
RS PRO 30A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS Stock No. 237-5265
Each
MYR19.29
In Stock
Better World
Siemens Sentron 5SY6 MCB, 1P, 300mA Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 521-4888
  • Mfr. Part No. 5SY6114-7
Each
MYR125.12
In Stock
Eaton 20A Rail Mount Fuse Holder for A1 Fuse, 1P, 690V ac
  • RS Stock No. 415-064
  • Mfr. Part No. RS20HWH
Each
MYR367.79
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