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

164 of 999+
Temporarily out of stock
Better World
ABB, XT4L MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-6822
  • Mfr. Part No. 1SDA068572R1 XT4L 160 Ekip LS/I 63A FF
Each
PHP115,791.45(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 4P, 32A Curve C, 400V AC, 12 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9324
  • Mfr. Part No. A9F94432
Each
PHP27,749.16(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 110A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-201
  • Mfr. Part No. 3VA5111-5EC31-1AA0
Each
PHP35,478.42(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8108
  • Mfr. Part No. C40H3
Each
PHP167,497.25(exc. VAT)
In Stock
Eaton 100A Centred Tag Fuse, NH01, 500V ac
  • RS Stock No. 703-8699P
  • Mfr. Part No. 100NHG01B
Each (Supplied in a Box)
PHP660.16(exc. VAT)
In Stock
Better World
Schneider Electric Acti9 1 Phase Busbar, 250 V, 440 V, 9mm Pitch
  • RS Stock No. 238-4080
  • Mfr. Part No. A9XPK707
Each
PHP22,660.52(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3911
  • Mfr. Part No. 3VA2063-8KP42-0AA0
Each
PHP145,761.78(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 6A Curve C, 250V DC
  • RS Stock No. 772-1502
  • Mfr. Part No. A9N61506
Each
PHP2,068.30(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti9 iIDK RCCB, 25A, 4 Pole, 30mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3456
  • Mfr. Part No. A9R55425
Each
PHP15,239.63(exc. VAT)
Temporarily out of stock
Schneider Electric ComPact Auxiliary Contact for use with NS630b to NS3200
  • RS Stock No. 275-6654
  • Mfr. Part No. 33109
Each
PHP6,098.93(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA
  • RS Stock No. 209-6928
  • Mfr. Part No. 3VA2140-6HN46-0AA0
Each
PHP72,339.13(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3806
  • Mfr. Part No. 3VA2340-6KP42-0AA0
Each
PHP209,477.43(exc. VAT)
In Stock
Better World
Schneider Electric iC60 RCD, 25A, 2 Pole, 300mA, Type AC
  • RS Stock No. 734-9062
  • Mfr. Part No. A9Q14225
Each
PHP18,874.63(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4660
  • Mfr. Part No. 3VA2140-7JP32-0AA0
Each
PHP95,376.38(exc. VAT)
Temporarily out of stock
ABB SU200 M MCB, 1P, 3A, Type Z, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-595
  • Mfr. Part No. 2CDS271337R0318
Each
PHP8,825.89(exc. VAT)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 1.5A, 250V ac
  • RS Stock No. 764-9582
Each (In a Pack of 10)
PHP39.82(exc. VAT)
In Stock
RS PRO 100A Bolted Tag Fuse, 120 V dc, 240V ac, 41.8mm
  • RS Stock No. 221-3635
Each (In a Pack of 5)
PHP684.194(exc. VAT)
Currently unavailable
Schurter SMD Non Resettable Fuse 4A, 250 V ac, 125V dc
  • RS Stock No. 876-1942P
  • Mfr. Part No. 3404.2472.22
Each (Supplied on a Reel)
PHP64.798(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA
  • RS Stock No. 209-6896
  • Mfr. Part No. 3VA2040-5HN36-0AA0
Each
PHP49,582.59(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 500A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 231-158
  • Mfr. Part No. 113515 NZMC3-S500-AVE
Each
PHP211,721.88(exc. VAT)
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