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

1641 of 999+
Temporarily out of stock
Siemens 224A Tag Fuse, NH2, 400V ac
  • RS Stock No. 144-089
  • Mfr. Part No. 3NA6242-4
1 Pack of 3
PHP4,090.80(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3954
  • Mfr. Part No. 3VA2110-6HM36-0AA0
Each
PHP89,700.38(exc. VAT)
Temporarily out of stock
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2792
  • Mfr. Part No. 2908203
Each
PHP9,156.92(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4822
  • Mfr. Part No. 3VA2563-7HL32-0AA0
Each
PHP246,088.81(exc. VAT)
Temporarily out of stock
Eaton 250A NH Fuse, 63 x 40 x 150mm, 400V ac
  • RS Stock No. 255-495
  • Mfr. Part No. 250NHG02BI-400
1 Pack of 3
PHP2,575.49(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9592
  • Mfr. Part No. 3VA10403ED360AA0
Each
PHP23,527.78(exc. VAT)
Temporarily out of stock
Better World
ABB, XT4L MCCB 3P 20A, Fixed Mount
  • RS Stock No. 236-6717
  • Mfr. Part No. 1SDA068366R1 XT4L 160 TMD 20A FF
Each
PHP61,828.37(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-8055
  • Mfr. Part No. C25W45E100
Each
PHP324,591.26(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4752
  • Mfr. Part No. 3VA2163-7JQ32-0AA0
Each
PHP137,181.55(exc. VAT)
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 236-7503
  • Mfr. Part No. 1SDA067807R1 XT2S 160 Ekip I 63A FF
Each
PHP51,684.38(exc. VAT)
Temporarily out of stock
Littelfuse PC Board Non Resettable Fuse, Axial 3A, 125V ac/dc
  • RS Stock No. 878-3693
  • Mfr. Part No. 0473003.MXL
Each (In a Pack of 50)
PHP81.026(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-986
  • Mfr. Part No. 3VA5215-7GF41-0AA0
Each
PHP154,964.47(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 80A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 231-387
  • Mfr. Part No. 113360 NZMH2-M80-SVE
Each
PHP49,778.10(exc. VAT)
Currently unavailable
Schneider Electric EasyPact Electronic Circuit Breaker 32A, Plug In
  • RS Stock No. 122-457
  • Mfr. Part No. LV510332P
Each
PHP8,398.40(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3578
  • Mfr. Part No. 3VA2010-7HN42-0AA0
Each
PHP104,719.21(exc. VAT)
Temporarily out of stock
Eaton 32A Centred Tag Fuse, NH0, 500V ac
  • RS Stock No. 703-8661
  • Mfr. Part No. 32NHG0B
Each
PHP593.85(exc. VAT)
Temporarily out of stock
Eaton 25A NH Fuse, 58 x 30 x 125mm, 500V ac
  • RS Stock No. 255-163
  • Mfr. Part No. 25NHG0B NH FUSE 25A 500V GG/GL SIZE 0
1 Pack of 3
PHP1,532.16(exc. VAT)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - LELHK111 3 Pole 240V ac Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 275-0368
  • Mfr. Part No. LELHK111-1-62-5.00-U-01-V
1 Box of 5
PHP78,377.72(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3847
  • Mfr. Part No. 3VA2063-6JP46-0AA0
Each
PHP129,402.75(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 157-336
  • Mfr. Part No. 3VA2216-6JP42-0AA0
Each
PHP221,335.14(exc. VAT)
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