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

56 of 999+
In Stock
Eaton 500A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 703-8765
  • Mfr. Part No. 500NHG3B
Each
PHP2,039.14(exc. VAT)
Temporarily out of stock
ABB RCBO, 50A Current Rating, 3P Poles, Type C
  • RS Stock No. 237-5071
  • Mfr. Part No. 2CSR253001R1504
Each
PHP28,153.69(exc. VAT)
Temporarily out of stock
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 231-9373
  • Mfr. Part No. 1SDA107561R1 XT6N 800 TMA 630-6300 3pFF
Each
PHP130,716.54(exc. VAT)
In Stock
Phoenix Contact 5A Brown Automotive Car Fuse, 32V No
  • RS Stock No. 253-7606
  • Mfr. Part No. 2908367
Each (In a Pack of 2)
PHP538.56(exc. VAT)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 160/250 Circuit Breakers
  • RS Stock No. 260-7713
  • Mfr. Part No. C1636E160
Each
PHP97,392.23(exc. VAT)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 175A, Breaking Capacity 14 kA, DIN Rail Mount
  • RS Stock No. 346-691
  • Mfr. Part No. NJDF36175TW
Each
PHP223,887.82(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY4520 Circuit Breaker, 2P, 20A Curve B, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 153-525
  • Mfr. Part No. 5SY4520-7
Each
PHP4,922.79(exc. VAT)
Temporarily out of stock
Siemens SENTRON Mounting Kit for use with 5SD74112
  • RS Stock No. 299-874
  • Mfr. Part No. 5SD7490-5
1 Set
PHP1,092.33(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 254-6278
  • Mfr. Part No. C10B3TM040
Each
PHP38,025.03(exc. VAT)
In Stock
ABB, Formula DSA MCCB 1P 125A, Fixed Mount
  • RS Stock No. 237-6139
  • Mfr. Part No. 1SDA066696R1
Each
PHP12,056.83(exc. VAT)
In Stock
Better World
Siemens RCBO, 16A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8793
  • Mfr. Part No. 5SU1656-6KK16
Each
PHP10,749.01(exc. VAT)
Temporarily out of stock
ABB S403M MCB, 3P, 10A Curve C, 440V AC, 12V DC, 25 kA Breaking Capacity
  • RS Stock No. 140-547
  • Mfr. Part No. 2CCS573001R0104
Each
PHP10,320.82(exc. VAT)
In Stock
Littelfuse SMD Non Resettable Fuse 3A, 32V ac/dc
  • RS Stock No. 541-3619
  • Mfr. Part No. 0466003.NR
Each (In a Pack of 10)
PHP35.442(exc. VAT)
In Stock
Siemens SENTRON 1 Phase Busbar, 27mm Pitch
  • RS Stock No. 217-6963
  • Mfr. Part No. 5ST3733
Each
PHP2,010.32(exc. VAT)
In Stock
Eaton, xEnergy MCCB 3P 80A, Breaking Capacity 25 kA
  • RS Stock No. 454-8067
  • Mfr. Part No. 259078 NZMB1-A80
Each
PHP18,066.59(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, PowerPact MCCB Molded Case Circuit Breaker 3P 40A
  • RS Stock No. 221-0894
  • Mfr. Part No. BDL36040LU
Each
PHP36,594.82(exc. VAT)
In Stock
ABB Tmax Mechanical Interlock for use with Tmax T
  • RS Stock No. 237-6011
  • Mfr. Part No. 1SDA062127R1 CABLES INTERV. HOR. T7M-X1
1 Box of 1
PHP30,063.88(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 40A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9910
  • Mfr. Part No. 3VA1140-3ED12-0AA0
Each
PHP9,970.87(exc. VAT)
Temporarily out of stock
ABB F200 RCCB, 125A, 4 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 225-6117
  • Mfr. Part No. 2CSF204001R1950 F204 AC-125/0,03
Each
PHP92,768.57(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6958
  • Mfr. Part No. 3VA1050-3ED32-0AA0
Each
PHP27,732.71(exc. VAT)
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