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
Fuses - PCB
Fuses - PCB

33476 Products showing for Fuses & Circuit Breakers

98 of 999+
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 50A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9369
  • Mfr. Part No. 3VA1150-6ED46-0AA0
Each
PHP36,427.74(exc. VAT)
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3947
  • Mfr. Part No. 3VA2110-5MP36-0AA0
Each
PHP82,279.06(exc. VAT)
Siemens SENTRON 3 Phase Busbar
  • RS Stock No. 187-5204
  • Mfr. Part No. 5ST3741
Each
PHP1,123.43(exc. VAT)
Schneider Electric, ComPacT MCCB 4P 160A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 347-112
  • Mfr. Part No. C16N47E160
Each
PHP383,791.36(exc. VAT)
Schneider Electric Straight Busbar Trunking, 500 → 1500mm, 3200A, KTA Series
  • RS Stock No. 655-017
  • Mfr. Part No. KTA3200ET51A
Each
PHP311,847.69(exc. VAT)
Eaton xEffect FAZ MCB, 3P, 30A Curve D, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 240-597
  • Mfr. Part No. 102273 FAZ-D30/3-NA
Each
PHP17,301.37(exc. VAT)
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)4(-4), NZM4(-4), PN4(-4)
  • RS Stock No. 231-903
  • Mfr. Part No. 119003 NZM4-XHB-DAR
Each
PHP40,101.06(exc. VAT)
Bourns Single, Three Phase Surge Protector, 50kA, 1kV, DIN Rail Mount
  • RS Stock No. 287-9618
  • Mfr. Part No. 1250A-1S-230
Each
PHP6,681.10(exc. VAT)
ABB PS1 1 Phase Busbar, 400V ac, 17.5mm Pitch
  • RS Stock No. 489-6489
  • Mfr. Part No. 2CDL210001R1012
Each
PHP551.65(exc. VAT)
Siemens 200A NH Fuse, NH1, 500V ac
  • RS Stock No. 396-083
  • Mfr. Part No. 3NA3140
Each (In a Pack of 3)
PHP1,482.02(exc. VAT)
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 50A
  • RS Stock No. 221-0900
  • Mfr. Part No. BGL36050LU
Each
PHP36,659.43(exc. VAT)
Schneider Electric, PowerPact B Circuit breaker 4P 25A, Breaking Capacity 14 KA, Clip-On
  • RS Stock No. 119-194
  • Mfr. Part No. BDL46025LU
Each
PHP41,006.99(exc. VAT)
ETI 10A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-846
  • Mfr. Part No. 2311404
Each (In a Pack of 5)
PHP74.402(exc. VAT)
Schneider Electric, ComPacT New Generation MCCB 3P 15A, Breaking Capacity 100 kA, Screw Mount
  • RS Stock No. 207-253
  • Mfr. Part No. BJL36015LU
Each
PHP57,613.30(exc. VAT)
Better World
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5245
  • Mfr. Part No. 3VA2510-5HL32-0AA0
Each
PHP258,493.75(exc. VAT)
Siemens 1 Phase Surge Arrester, 25kA, 255V (Volts), Screw Mount Mount
  • RS Stock No. 300-001
  • Mfr. Part No. 5SD7441-1KF00
Each
PHP38,387.69(exc. VAT)
Wickmann Fuse Holder Battery Clamp
  • RS Stock No. 342-0205
  • Mfr. Part No. 255.1000.0001
Each
PHP1,493.14(exc. VAT)
Schneider Electric EasyPact Electronic Circuit Breaker 500A, Plug In
  • RS Stock No. 122-317
  • Mfr. Part No. LV563325P
Each
PHP48,930.30(exc. VAT)
Better World
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3804
  • Mfr. Part No. 3VA2340-5JQ32-0AA0
Each
PHP165,621.04(exc. VAT)
Littelfuse 0.5A Resettable Fuse, 13.2V dc
  • RS Stock No. 138-679P
  • Mfr. Part No. NANOSMDC050F/13.2-2
Each (Supplied on a Reel)
PHP22.834(exc. VAT)
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