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

33502 Products showing for Fuses & Circuit Breakers

221 of 999+
In Stock
RS PRO 63A NH Fuse, NH000, 415V ac
  • RS Stock No. 221-3678
Each (In a Pack of 3)
PHP952.773(exc. VAT)
Temporarily out of stock
Eaton xEffect MCB, 3P, 50A Curve B, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 240-257
  • Mfr. Part No. 174523 AZ-3N-B50
Each
PHP35,042.61(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON 5SL60 MCB, 1P + N, 2A Curve C, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-537
  • Mfr. Part No. 5SL6002-7KL
Each
PHP5,564.30(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 32A Current Rating, 4P Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 247-1931
  • Mfr. Part No. A9D87432
Each
PHP39,059.36(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Mechanical Interlock for use with INX16…W, IZMX16…W
  • RS Stock No. 132-808
  • Mfr. Part No. 184213 IZMX-MIL3133C-W16-1
Each
PHP39,539.97(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7932
  • Mfr. Part No. C25N32D100
Each
PHP104,295.10(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 260-7622
  • Mfr. Part No. C11H3TM063B
Each
PHP44,902.35(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-259
  • Mfr. Part No. 3VA5212-5EC31-0AA0
Each
PHP83,468.08(exc. VAT)
In Stock
SIBA 25A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 314-4838
  • Mfr. Part No. 50-179-06/25A
Each (In a Pack of 5)
PHP551.822(exc. VAT)
Temporarily out of stock
ABB S800S MCB, 4P, 50A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-765
  • Mfr. Part No. 2CCS864001R0501
Each
PHP32,962.13(exc. VAT)
Temporarily out of stock
Eaton NZM Handle for use with N(S)1(-4), NZM1(-4), PN1(-4)
  • RS Stock No. 121-800
  • Mfr. Part No. 144906 NZM1-XHB-DA-V6-NA
Each
PHP23,799.17(exc. VAT)
Temporarily out of stock
Phoenix Contact AB2/SS Fixing Bracket for use with 3 mm x 10 mm or 6 mm x 6 mm busbar
  • RS Stock No. 131-614
  • Mfr. Part No. 404431
1 Pack of 1
PHP292.85(exc. VAT)
In Stock
ABB System Pro M Compact S200M MCB, 1P, 2A, Type Z, 230/400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-866
  • Mfr. Part No. 2CDS271001R0278
Each
PHP8,974.17(exc. VAT)
Temporarily out of stock
Contactum DDB Conversion Kit
  • RS Stock No. 201-0760
  • Mfr. Part No. DDB1254ISPCK
Each
PHP1,826.31(exc. VAT)
Temporarily out of stock
ABB SU200 M MCB, 3P, 3A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-807
  • Mfr. Part No. 2CDS273337R0034
Each
PHP24,832.30(exc. VAT)
Temporarily out of stock
Schneider Electric Canalis 3 Phase Busbar, 230-400V
  • RS Stock No. 212-324
  • Mfr. Part No. KBA40ED4303TW
1 Pack of 6
PHP97,946.69(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 3 kA
  • RS Stock No. 245-375
  • Mfr. Part No. 3VA6225-0HL41-0AA0
Each
PHP252,922.61(exc. VAT)
Limited stock
Bourns 0.1A Resettable Fuse, 60V
  • RS Stock No. 647-8415
  • Mfr. Part No. MF-R010
Each (In a Pack of 10)
PHP20.541(exc. VAT)
In Stock
Mersen 32A Bolted Tag Fuse, A2, 460 V dc, 690V ac, 73mm
  • RS Stock No. 178-1103
  • Mfr. Part No. Y1019266 / BTIA69V32M50
Each (In a Pack of 10)
PHP800.119(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 3P 1.2kA, Breaking Capacity 18 kA, Fixed Mount
  • RS Stock No. 243-564
  • Mfr. Part No. 102689 NS4-800-NA
Each
PHP284,812.85(exc. VAT)
1
221
1676
Results per page

Related links