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

39 of 999+
In Stock
Eaton 450A Bolted Tag Fuse, FMM, 500 V dc, 690V ac, 83.7mm
  • RS Stock No. 182-1410
  • Mfr. Part No. 450FMM
Each
PHP21,071.80(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4306 MCB, 3P, 6A Curve C, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 300-049
  • Mfr. Part No. 5SJ4306-7HG41
Each
PHP18,519.73(exc. VAT)
Temporarily out of stock
Eaton PXF RCCB, 63A, 4 Pole, 30mA, Type A, 230/400V ac
  • RS Stock No. 247-163
  • Mfr. Part No. 102939 PXF-63/4/003-KV/A
Each
PHP42,007.15(exc. VAT)
In Stock
Siemens 160A NH Fuse, NH00, 440 - 500V ac/dc
  • RS Stock No. 269-8344
  • Mfr. Part No. 3ND1836
Each (In a Pack of 3)
PHP1,391.507(exc. VAT)
In Stock
RS PRO 4A British Standard Fuse, F1, 550V ac
  • RS Stock No. 521-2898
Each (In a Pack of 5)
PHP298.034(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 10A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 201-2234
  • Mfr. Part No. A9DC3610
Each
PHP14,970.83(exc. VAT)
In Stock
Eaton, xEnergy MCCB 3P 40A, Breaking Capacity 25 kA
  • RS Stock No. 454-8039
  • Mfr. Part No. 259075 NZMB1-A40
Each
PHP20,899.81(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
  • RS Stock No. 156-686
  • Mfr. Part No. 3VA2340-7HN32-0AA0
Each
PHP197,725.99(exc. VAT)
Temporarily out of stock
Eaton 15A PCB Mount 5 x 20mm Fuse Block, 250V
  • RS Stock No. 233-0609
  • Mfr. Part No. BK4-HTC-528M
Each (In a Pack of 10)
PHP63.756(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti9 Range
  • RS Stock No. 201-2237
  • Mfr. Part No. A9DC3620
Each
PHP13,401.04(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 60A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-451
  • Mfr. Part No. 3VA5160-6ED21-1AA0
Each
PHP27,977.77(exc. VAT)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 50A, Fixed Mount
  • RS Stock No. 254-6305
  • Mfr. Part No. C11B3TM050L
Each
PHP28,573.36(exc. VAT)
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 3P 125A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 211-5987
  • Mfr. Part No. 3VA1112-6EE32-0AA0
Each
PHP38,645.48(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 40A, Breaking Capacity 18 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-377
  • Mfr. Part No. 3VA5140-5ED21-1AA0
Each
PHP25,427.80(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 225A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-785
  • Mfr. Part No. 3VA5222-5EC31-0AA0
Each
PHP104,802.45(exc. VAT)
In Stock
Eaton HTC Series Thermoplastic Fuse Cover for 5 x 20mm Fuse
  • RS Stock No. 765-2976
  • Mfr. Part No. HTC-140M
Each (In a Pack of 5)
PHP23.066(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4835
  • Mfr. Part No. 3VA2580-5HK32-0AA0
Each
PHP272,268.86(exc. VAT)
Temporarily out of stock
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7633
  • Mfr. Part No. 5TT4426-0
Each
PHP6,754.10(exc. VAT)
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - R21 2 Pole Panel Mount, 15A Current Rating
  • RS Stock No. 275-0461
  • Mfr. Part No. R21-2-15.0A-B06CV-V
Each
PHP3,288.38(exc. VAT)
In Stock
Eaton 160A British Standard Fuse, B2, 660V ac, 111mm
  • RS Stock No. 415-288
  • Mfr. Part No. TF160
Each
PHP7,405.25(exc. VAT)
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