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

273 of 999+
In Stock
Siemens 20A NH Fuse, NH000, 440 - 500V ac/dc
  • RS Stock No. 269-8335
  • Mfr. Part No. 3ND1807
Each (In a Pack of 3)
PHP1,533.857(exc. VAT)
In Stock
Siemens 63A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 203-2019
  • Mfr. Part No. 3NA3822-6
Each (In a Pack of 3)
PHP3,062.58(exc. VAT)
Temporarily out of stock
Eaton Automotive, Ferrule, Glass Fuse Tester
  • RS Stock No. 312-3291
  • Mfr. Part No. TF-2
Each
PHP1,146.26(exc. VAT)
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA2 100/160/250
  • RS Stock No. 269-7130
  • Mfr. Part No. 3VA9224-0JC22
Each (In a Pack of 4)
PHP2,128.375(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4131
  • Mfr. Part No. 3VA2116-8JP32-0AA0
Each
PHP143,169.08(exc. VAT)
Temporarily out of stock
Siemens 25A Centred Tag Fuse, NH1, 500V
  • RS Stock No. 230-2944
  • Mfr. Part No. 3NA6110
Each (In a Pack of 3)
PHP1,826.877(exc. VAT)
Temporarily out of stock
ABB Tmax XT Trip Unit for use with XT4
  • RS Stock No. 236-7292
  • Mfr. Part No. 1SDA067465R1 TMD 16-300 XT4 4p
Each
PHP43,725.78(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 63A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-8230
  • Mfr. Part No. LV426375
Each
PHP33,954.76(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 15A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 147-604
  • Mfr. Part No. 3VA5195-4EC31-0AA0
Each
PHP33,414.80(exc. VAT)
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA51 Series
  • RS Stock No. 263-953
  • Mfr. Part No. 3VA9131-0WD31
Each
PHP2,558.55(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON 5SL60 MCB, 1P + N, 32A Curve B, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-348
  • Mfr. Part No. 5SL6032-6
Each
PHP3,775.51(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3879
  • Mfr. Part No. 3VA2063-7KP32-0AA0
Each
PHP126,411.24(exc. VAT)
In Stock
Eaton PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS Stock No. 169-9512
  • Mfr. Part No. SR-5F-2-5A-BK
Each (In a Bag of 200)
PHP63.171(exc. VAT)
Temporarily out of stock
Lovato P1RD MCCB, 63A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 276-5667
  • Mfr. Part No. P1RD2P63A300
Each
PHP19,920.47(exc. VAT)
In Stock
Littelfuse Fuse Holder Finger Grip Type Cap
  • RS Stock No. 787-4325
  • Mfr. Part No. 83700000005
Each (In a Pack of 5)
PHP152.856(exc. VAT)
In Stock
Schneider Electric Acti9 A9N MCB, 4P, 125A, 440V AC, 10000 A Breaking Capacity
  • RS Stock No. 276-8732
  • Mfr. Part No. A9N18377
Each
PHP67,594.45(exc. VAT)
In Stock
Siemens 3RV1935 Busbar for use with Circuit Breaker 3RV2
  • RS Stock No. 272-0032
  • Mfr. Part No. 3RV19353C
Each
PHP2,619.27(exc. VAT)
Last RS stock
Lovato RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 825-6040
  • Mfr. Part No. P1RB1NC25AC030
Each
PHP6,667.64(exc. VAT)
Temporarily out of stock
Siemens 63A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 210-6918
  • Mfr. Part No. 3NA7122-6
Each (In a Pack of 3)
PHP5,697.20(exc. VAT)
In Stock
Schurter Fuse Puller
  • RS Stock No. 893-6994
  • Mfr. Part No. 0853.1250
Each (In a Pack of 5)
PHP111.97(exc. VAT)
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