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

33502 Products showing for Fuses & Circuit Breakers

267 of 999+
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with Modular Installation Devices
  • RS Stock No. 203-3307
  • Mfr. Part No. 8GK4351-1KK12
Each
PHP5,900.69(exc. VAT)
Temporarily out of stock
Eaton 2A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8576
  • Mfr. Part No. STD2
1 Box of 20
PHP4,203.94(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 3, 3+N Phase Distribution Board, 8 Way, 250 A
  • RS Stock No. 336-626
  • Mfr. Part No. SEA9BN8PS
Each
PHP21,202.10(exc. VAT)
Temporarily out of stock
ABB Copper Copper Bar for Use with TriLine
  • RS Stock No. 237-6607
  • Mfr. Part No. 2CPX061426R9999
1 Box of 1
PHP121,612.52(exc. VAT)
Temporarily out of stock
Eaton 400A 0.001 x 0.001in Modular Fuse Fuse Block, 2.5kV
  • RS Stock No. 260-720
  • Mfr. Part No. BH-1131
Each
PHP23,843.34(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3738
  • Mfr. Part No. 3VA1150-5ED42-0AA0
Each
PHP30,944.79(exc. VAT)
Temporarily out of stock
ABB RCBO, 25A Current Rating, 1P Poles, Type C
  • RS Stock No. 237-5234
  • Mfr. Part No. 2CSR275051R2254
Each
PHP11,405.44(exc. VAT)
In Stock
RS PRO 7.5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 563-772
Each (In a Pack of 10)
PHP27.54(exc. VAT)
Temporarily out of stock
Eaton xEffect xE?ect - FAZ-NA-DC MCB MCB, 2P, 3A Curve C, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 103-793
  • Mfr. Part No. 137250 FAZ-C3/2-NA-DC
Each
PHP18,150.96(exc. VAT)
In Stock
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6189
  • Mfr. Part No. 5SU1326-6FP13
Each
PHP13,206.45(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 800A IZMX/INX, 4 channels , Fixed
  • RS Stock No. 127-761
  • Mfr. Part No. 183550 IZMX16N4-V08F-1
Each
PHP428,395.50(exc. VAT)
Temporarily out of stock
Eaton PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 169-9528
  • Mfr. Part No. SS-5-2A-BK
Each (In a Bag of 200)
PHP60.194(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-609
  • Mfr. Part No. 3VA5140-1MU31-0AA0
Each
PHP34,278.32(exc. VAT)
Temporarily out of stock
Better World
Siemens RCBO, 125A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6236
  • Mfr. Part No. 5SU1644-6KK82
Each
PHP119,383.48(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 3A Curve D, 400V AC, 60V DC, 50 kA Breaking Capacity
  • RS Stock No. 610-369
  • Mfr. Part No. 5SY8603-8
Each
PHP21,718.62(exc. VAT)
In Stock
RS PRO 60A Slotted Tag Fuse, 17.4 x 42mm, 240V, 42mm
  • RS Stock No. 188-4634
Each
PHP1,315.93(exc. VAT)
In Stock
Mersen 630A size 31 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2120
  • Mfr. Part No. W300008
Each
PHP14,545.05(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY5 MCB, 2P, 300mA Curve C, 400V AC, 440V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-631
  • Mfr. Part No. 5SY5214-7
Each
PHP15,188.36(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 450A, Breaking Capacity 9 kA, Plug In
  • RS Stock No. 246-907
  • Mfr. Part No. 192333 NZMH3-PMX450-SVE
Each
PHP258,127.68(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8025
  • Mfr. Part No. C25V46E250
Each
PHP350,139.36(exc. VAT)
1
267
1676
Results per page

Related links