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

46604 Products showing for Fuses & Circuit Breakers

7 / 999+
Better World
ABB Compact Home SH200 MCB, 2P, 16A Curve C, 400V AC, 400V DC, 6 kA Breaking Capacity
  • RS Stock No. 231-9656
  • Mfr. Part No. 2CDS212001R0164 SH202-C 16
1 Box of 1
MYR229.27
ABB RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9921
  • Mfr. Part No. 2CSR255080R1064 DS201 C6 AC30
1 Box of 1
MYR879.67
Littelfuse 0.2A Resettable Fuse, 72V
  • RS Stock No. 517-6584
  • Mfr. Part No. RXEF020
Each (In a Pack of 10)
MYR1.604
ETI 10A D01 Neozed Fuse, E14 Thread Size, gG, 400V ac
  • RS Stock No. 415-963
  • Mfr. Part No. 2211004
Each (In a Pack of 5)
MYR5.64
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 769-0170
  • Mfr. Part No. 03453LF1H
Each
MYR25.20
Siemens 4A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-989
  • Mfr. Part No. 3NA3804
Each (In a Pack of 3)
MYR39.723
RS PRO 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-706
Each (In a Pack of 10)
MYR1.676
RS PRO MCB, 2P, 6A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0186
Each
MYR53.50
RS PRO 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-463
Each (In a Pack of 10)
MYR1.676
ETA Thermal Circuit Breaker - 1170 Single Pole 28V dc Voltage Rating, 15A Current Rating
  • RS Stock No. 854-469
  • Mfr. Part No. 1170-21-15A
Each
MYR105.96
RS PRO MCB, 1P, 6A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0171
Each
MYR25.42
RS PRO 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 413-248
Each (In a Pack of 10)
MYR4.401
RS PRO 3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-6007
Each (In a Pack of 10)
MYR1.795
RS PRO 4A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4190
Each (In a Pack of 5)
MYR20.072
Better World
Siemens 5SV3 RCCB, 25A, 4 Pole, 30mA, Type A
  • RS Stock No. 124-7731
  • Mfr. Part No. 5SV3342-6
Each
MYR746.13
Rittal Earthing Strap 25mm Diameter
  • RS Stock No. 265-1246
  • Mfr. Part No. 2569000
Each (In a Pack of 5)
MYR74.124
Siemens 50A NH Fuse, NH000, 500V ac
  • RS Stock No. 395-929
  • Mfr. Part No. 3NA3820
Each (In a Pack of 3)
MYR103.717
RS PRO MCB, 1P, 4A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0192
Each
MYR48.36
Schurter Thermal Circuit Breaker - T9-711 Single Pole Snap In
  • RS Stock No. 868-8885
  • Mfr. Part No. 4404.0039
Each (In a Pack of 50)
MYR4.019
RS PRO 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5991
Each (In a Pack of 10)
MYR1.976
Results per page
1
7
2331

Related links