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

4 / 999+
Schurter 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3866
  • Mfr. Part No. 8020.5013
Each
MYR4.23
RS PRO 25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 247-3999
Each (In a Pack of 10)
MYR6.138
Siemens ALPHA Busbar
  • RS Stock No. 236-8449
  • Mfr. Part No. 8GK9731-0KK50
Each
MYR171.42
MK Electric Earthing Lead Adapter Brass
  • RS Stock No. 491-822
  • Mfr. Part No. 9933
Each
MYR83.16
RS PRO 100mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9850
Each (In a Pack of 10)
MYR3.391
SIBA 4A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3442
  • Mfr. Part No. 70-010-04/4A
Each (In a Pack of 5)
MYR26.252
Siemens Sentron Trip alarm switch for use with 3VA Series Circuit Breaker
  • RS Stock No. 874-4515
  • Mfr. Part No. 3VA9988-0AB12
Each
MYR183.56
RS PRO Non Resettable Fuse 3.5A, 250V ac
  • RS Stock No. 139-960
1 Bag of 10
MYR102.43
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6935
  • Mfr. Part No. 2CSR255080R1165 DS201 B16 AC30
Each
MYR925.33
RS PRO 2.5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-403
Each (In a Pack of 10)
MYR1.618
RS PRO MCB, 2P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0181
Each
MYR106.99
C.BREAKER TMAX XT1 P Fp 3P Ef
  • RS Stock No. 192-0817
  • Mfr. Part No. 1SDA068183R1
Each
MYR1,174.44
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 20A Current Rating
  • RS Stock No. 210-2109
  • Mfr. Part No. 3120-N554-P7T1-W02D-20A
Each
MYR181.17
Schurter 5A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3875
  • Mfr. Part No. 8020.5075
Each
MYR4.32
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8952
  • Mfr. Part No. R9H13403
Each
MYR450.97
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-380
Each (In a Pack of 10)
MYR2.287
RS PRO BS 1362, F, T Fuse Kit
  • RS Stock No. 893-8546
Each
MYR417.14
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 8A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2796
  • Mfr. Part No. 2908262
Each
MYR245.44
RS PRO 2A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6035
Each (In a Pack of 10)
MYR1.949
RS PRO 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 247-4009
Each (In a Pack of 10)
MYR4.75
Results per page
1
4
2331

Related links