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

33502 Products showing for Fuses & Circuit Breakers

206 of 999+
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 5A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-724
  • Mfr. Part No. 3VA5105-1MU31-0AA0
Each
PHP34,278.32(exc. VAT)
Schneider Electric, Compact MCCB 4P 1.6kA, Fixed Mount
  • RS Stock No. 247-1819
  • Mfr. Part No. 33485
Each
PHP613,440.41(exc. VAT)
Schneider Electric, ComPacT MCCB 4P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 654-143
  • Mfr. Part No. C12F6TM160L
Each
PHP86,819.66(exc. VAT)
Eaton BBA Busbar Adapter 3 Phase Busbar, 690V
  • RS Stock No. 230-808
  • Mfr. Part No. 116901 BBA2-80/2TS-S
1 Pack of 4
PHP15,440.93(exc. VAT)
Siemens Sentron Connecting Terminals for use with Busbar Centre-To-Centre Spacing
  • RS Stock No. 209-7098
  • Mfr. Part No. 8US1921-2AA01
Each (In a Pack of 15)
PHP200.305(exc. VAT)
Hager MJT MCB, 2P, 10A Curve C, 240 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4949
  • Mfr. Part No. MJT710
Each
PHP2,053.29(exc. VAT)
Schurter PC Board Non Resettable Fuse, Radial 50mA, 250V ac
  • RS Stock No. 284-4969
  • Mfr. Part No. 0034.6001
Each (In a Pack of 10)
PHP51.084(exc. VAT)
80A NH Fuse, 63 x 40 x 135mm, 690V ac
  • RS Stock No. 263-206
  • Mfr. Part No. 80NHM1B-690
1 Pack of 3
PHP4,206.54(exc. VAT)
Siemens ALPHA Cover for use with Front Cover
  • RS Stock No. 203-3275
  • Mfr. Part No. 8GK4501-3KK12
Each
PHP6,528.98(exc. VAT)
Siemens SENTRON 3 Phase Busbar
  • RS Stock No. 187-5202
  • Mfr. Part No. 5ST3740-1
Each
PHP6,993.23(exc. VAT)
10A Tag Fuse, 22 x 86mm, 0.46/0.66kV, 73mm
  • RS Stock No. 263-407
  • Mfr. Part No. TIA10
1 Pack of 20
PHP13,385.37(exc. VAT)
Eaton xComfort KLV Distribution Board Enclosure, 2 Way
  • RS Stock No. 125-103
  • Mfr. Part No. 178832 KLV-48UPM-F
Each
PHP23,087.20(exc. VAT)
Eaton 63A Bolted Tag Fuse, 460 V dc, 660V ac, 111mm
  • RS Stock No. 182-1502
  • Mfr. Part No. TBC63
Each (In a Box of 20)
PHP2,276.019(exc. VAT)
Better World
Schneider Electric 12 → 24V ac/dc Shunt Trip Shunt trip for use with ARA, ic60 MCB, IDPN Vigi, ild Double
  • RS Stock No. 791-2818
  • Mfr. Part No. A9A26478
Each
PHP6,514.15(exc. VAT)
Bourns Surface Mount Fuse 2.5A, 65V dc
  • RS Stock No. 245-9255
  • Mfr. Part No. SF-1206SA250M-2
Each (On a Reel of 3000)
PHP35.372(exc. VAT)
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 147-383
  • Mfr. Part No. 3VA5215-0BB31-0AA0
Each
PHP58,931.75(exc. VAT)
Siemens 125A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 396-386
  • Mfr. Part No. 3NE1022-0
Each (In a Pack of 3)
PHP7,897.85(exc. VAT)
Schurter SMD Non Resettable Fuse 630mA, 125 V dc, 250V ac
  • RS Stock No. 173-8006
  • Mfr. Part No. 3403.0164.24
1 Reel of 2000
PHP69,109.60(exc. VAT)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-465
  • Mfr. Part No. 3VA6560-7JP42-2AA0
Each
PHP513,176.30(exc. VAT)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 30A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-333
  • Mfr. Part No. 3VA5130-6EC31-1AA0
Each
PHP33,678.41(exc. VAT)
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