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

51028 Products showing for Fuses & Circuit Breakers

628 of 999+
ABB MCCB Molded Case Circuit Breaker 4P 500A, Fixed Mount
  • RS Stock No. 250-4202
  • Mfr. Part No. 1SDA054487R1
Each
£3,065.06
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Touch LSI, 4 channels
  • RS Stock No. 259-3779
  • Mfr. Part No. 1SDA071785R1
Each
£14,040.71
Better World
ABB SN201 MCB, 2P, 6A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 231-9972
  • Mfr. Part No. 2CSS255101R0064 SN201-C6 -
1 Box of 1
£33.49
Schneider Electric IKQ RCD, 25A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 339-839
  • Mfr. Part No. SED25034
Each
£208.43
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 4 channels Type N
  • RS Stock No. 156-836
  • Mfr. Part No. 3VA2340-0HM42-0AA0
Each
£2,495.36
250A Tag Fuse, 56 x 79mm, 1.5kV
  • RS Stock No. 263-112
  • Mfr. Part No. SD1-D-PV NH1 SINGLE POLE SILVER 1/4 SCREW PV
1 Pack of 3
£91.29
Eaton Eaton Distribution Parts 1 Phase Busbar, 400V
  • RS Stock No. 230-640
  • Mfr. Part No. 112371 ZV-KSBI-5TE+HI
Each
£4.59
Better World
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-6736
  • Mfr. Part No. 1SDA068393R1 XT4L 160 TMA 125A FF
Each
£1,075.45
Weidmüller 1 Phase Surge Protector, 10A, 250V ac, Surface Mount Mount
  • RS Stock No. 287-5338
  • Mfr. Part No. 8614770000
Each
£83.53
Europa Busbar
  • RS Stock No. 849-6260
  • Mfr. Part No. ECWBB4
Each
£2.43
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 782-7947
  • Mfr. Part No. W23-X1A1G-10
Each
£31.11
Siemens 10A NH Fuse, NH000, 500V ac
  • RS Stock No. 269-8333
  • Mfr. Part No. 3ND1803
Each (In a Pack of 3)
£10.787
Siemens 16A DII Diazed Fuse, E27 Thread Size, gR, 500V
  • RS Stock No. 203-3952
  • Mfr. Part No. 5SD420
Each (In a Pack of 5)
£7.848
ETA Thermal Circuit Breaker - 3130 2 Pole 240V Voltage Rating Snap In, 3A Current Rating
  • RS Stock No. 212-1941
  • Mfr. Part No. 3130-F120-P7T1-W02Q-3A
Each
£29.98
ABB System Pro M Compact S200 M UC MCB, 1P, 3A, Type Z, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-029
  • Mfr. Part No. 2CDS271061R0318
Each
£97.94
ETA Thermal Circuit Breaker - 2 5700 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 729-2758
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-10A
Each
£23.00
Schurter 1.6A Slow-Blow Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 865-7994
  • Mfr. Part No. 0034.5045
Each (In a Pack of 10)
£0.745
ABB F200 RCCB, 100A, 2 Pole, 500mA, Type AC, 230V ac
  • RS Stock No. 225-6099
  • Mfr. Part No. 2CSF202001R4900 F202 AC-100/0.5
Each
£163.30
ABB DDA200 RCD, 63A, 4 Pole, 300mA, Type AC
  • RS Stock No. 183-3656
  • Mfr. Part No. 2CSB204001R3630
Each
£139.35
Siemens 10V ac Auxiliary Switch
  • RS Stock No. 223-7680
  • Mfr. Part No. 5TT4930
Each
£32.00
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