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

1648 of 999+
Last RS stock
Bourns Thermal Fuse +77°C 50 A, 28V
  • RS Stock No. 258-6408
  • Mfr. Part No. SC77AAB
Each (In a Pack of 10)
PHP44.296(exc. VAT)
Temporarily out of stock
Siemens 200A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 210-6924
  • Mfr. Part No. 3NA7140-6
Each (In a Pack of 3)
PHP6,063.673(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9645
  • Mfr. Part No. 3VA11103FE460AA0
Each
PHP39,819.46(exc. VAT)
Temporarily out of stock
ABB RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6908
  • Mfr. Part No. 2CSR275180R2165
Each
PHP12,705.93(exc. VAT)
Temporarily out of stock
Littelfuse SMD Non Resettable Fuse 1.75A, 32V ac/dc
  • RS Stock No. 820-7186P
  • Mfr. Part No. 04401.75WR
Each (Supplied on a Reel)
PHP42.55(exc. VAT)
Temporarily out of stock
Better World
ABB, XT2V MCCB 3P 2.5A, Fixed Mount
  • RS Stock No. 236-7431
  • Mfr. Part No. 1SDA067695R1 XT2V 160 TMD 2.5A FF
Each
PHP79,786.36(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7812
  • Mfr. Part No. C16N44V100
Each
PHP205,763.70(exc. VAT)
Temporarily out of stock
Siemens ALPHA Adapter Kit for use with ALPHA 400/630 DIN
  • RS Stock No. 216-4835
  • Mfr. Part No. 8GK9101-5KK01
Each
PHP1,122.84(exc. VAT)
In Stock
Better World
Siemens SENTRON 3VA9 Terminal for use with 3VA1 100/160
  • RS Stock No. 218-1803
  • Mfr. Part No. 3VA9153-0JA11
Each
PHP2,443.80(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3993
  • Mfr. Part No. 3VA2110-7JQ36-0AA0
Each
PHP131,959.74(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 1A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9441
  • Mfr. Part No. 3VA1181-6MG36-0AA0
Each
PHP31,938.70(exc. VAT)
In Stock
RS PRO SMD Non Resettable Fuse 1.5A, 125V
  • RS Stock No. 182-4090P
Each (Supplied in a Box)
PHP9.592(exc. VAT)
In Stock
Nidec Components 4A Resettable Fuse, 30V
  • RS Stock No. 637-6482
  • Mfr. Part No. PRCP-R400-0-99
Each (In a Pack of 5)
PHP56.202(exc. VAT)
Last RS stock
RS PRO SMD Non Resettable Fuse 200mA, 125V
  • RS Stock No. 182-4124P
Each (Supplied in a Box)
PHP30.652(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 45A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-637
  • Mfr. Part No. 3VA5145-5ED11-0AA0
Each
PHP13,651.42(exc. VAT)
Temporarily out of stock
Bourns Surface Mount Fuse 4A, 50 V dc, 63 V dc
  • RS Stock No. 245-9205
  • Mfr. Part No. SF-0603SPA400R-2
Each (On a Reel of 5000)
PHP39.959(exc. VAT)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 2.5kA , DIN Rail
  • RS Stock No. 132-877
  • Mfr. Part No. 183747 IZMX40H3-V25W-1
Each
PHP1,341,467.26(exc. VAT)
Temporarily out of stock
Hager Terminal Block
  • RS Stock No. 251-2060
  • Mfr. Part No. KN04P
Each
PHP911.71(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4512
  • Mfr. Part No. 3VA2125-0KQ32-0AA0
Each
PHP143,580.98(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3626
  • Mfr. Part No. 3VA2010-8KQ36-0AA0
Each
PHP167,544.43(exc. VAT)
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