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

46580 Products showing for Fuses & Circuit Breakers

1 / 999+
ABB 4 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS Stock No. 811-1880
  • Mfr. Part No. 1SL1200A00 65P04X12
Each
MYR131.30
RS PRO 100mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9579
Each (In a Pack of 10)
MYR3.979
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
RS PRO Earthing Strap Metal 12 → 32mm Diameter
  • RS Stock No. 390-2448
Each (In a Pack of 10)
MYR11.328
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8530
Each
MYR348.88
TE Connectivity Thermal Circuit Breaker - W54 Single Pole 250V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 782-7988
  • Mfr. Part No. W54-XB1A4A10-20
Each
MYR26.86
Better World
Schneider Electric Circuit Trip
  • RS Stock No. 219-9355
  • Mfr. Part No. LV429392
Each
MYR721.30
SIBA 2A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3391
  • Mfr. Part No. 70-010-04/2A
Each (In a Pack of 5)
MYR25.232
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7719
  • Mfr. Part No. 2CDS252001R0104 S202-C10
Each
MYR248.35
RS PRO 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-413
Each (In a Pack of 10)
MYR1.479
ABB RCBO, 16A Current Rating, 1P+N Poles, 10mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6950
  • Mfr. Part No. 2CSR275180R0164 DS201 M C16 A10
Each
MYR849.09
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 232-0270
  • Mfr. Part No. 1SDA068092R1 XT4N 250 TMA 250A FF
Each
MYR3,864.70
RS PRO MCB, 1P, 10A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0195
Each
MYR54.92
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-598
Each (In a Pack of 10)
MYR1.725
Better World
Siemens Sentron 5SY4 MCB, 1P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2030
  • Mfr. Part No. 5SY4116-7
Each
MYR109.03
Phoenix Contact Thermal Circuit Breaker - TCP 1A Single Pole 250V ac Voltage Rating On Base Element, 1A Current Rating
  • RS Stock No. 801-6892
  • Mfr. Part No. 0712194
Each
MYR85.64
RS PRO MCB, 1P, 4A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0192
Each
MYR48.36
ABB 36 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1903
  • Mfr. Part No. 1SL1206A00 65P12X32
Each
MYR575.33
ABB RCBO, 40A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 136-7810
  • Mfr. Part No. 2CSR255051R1404 DSE201 C40 AC30 - N Blue
Each
MYR456.34
RS PRO MCB, 1P, 6A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0171
Each
MYR25.42
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