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

229 of 999+
Temporarily out of stock
Siemens RCBO, 63A Current Rating, 3P Poles, 300mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 211-9583
  • Mfr. Part No. 5SM2636-6
Each
PHP6,998.14(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 2P 50A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-671
  • Mfr. Part No. 3VA5150-4ED21-0AA0
Each
PHP30,491.36(exc. VAT)
Unavailable
Schneider Electric Kaedra Distribution Board, 12 Way, 90 A
  • RS Stock No. 498-3476
  • Mfr. Part No. 13970
Each
PHP15,815.31(exc. VAT)
In Stock
Omron Busbar
  • RS Stock No. 111-3531
  • Mfr. Part No. PYDN-7.75-020R
Each
PHP73.66(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9782
  • Mfr. Part No. 3VA1116-5ED36-0AA0
Each
PHP62,173.80(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 230-262
  • Mfr. Part No. 107793 NZMN2-A125-BT-NA
Each
PHP89,292.68(exc. VAT)
Temporarily out of stock
Siemens SENTRON Motor Operator for use with 3VA53/54, 3VA63/64
  • RS Stock No. 152-452
  • Mfr. Part No. 3VA9447-0HA20
Each
PHP87,973.08(exc. VAT)
Temporarily out of stock
Better World
ABB, XT4H MCCB 3P 100A, Fixed Mount
  • RS Stock No. 236-6785
  • Mfr. Part No. 1SDA068513R1 XT4H 160 Ekip LS/I 100A FF
Each
PHP66,939.61(exc. VAT)
Temporarily out of stock
Schneider Electric Multi9 M9F1 MCB, 3P, 4A Curve C, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-125
  • Mfr. Part No. M9F11304
Each
PHP15,442.79(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 35A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-874
  • Mfr. Part No. 3VA5235-7ED31-2AA0
Each
PHP82,697.43(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 10A Curve D, 400V AC, 72V DC, 40 kA Breaking Capacity
  • RS Stock No. 610-494
  • Mfr. Part No. 5SY8410-8BB08
Each
PHP12,767.02(exc. VAT)
Temporarily out of stock
Bourns Surface Mount Fuse 15A, 32V dc
  • RS Stock No. 245-9245
  • Mfr. Part No. SF-1206SA1500R-2
Each (On a Reel of 5000)
PHP36.354(exc. VAT)
In Stock
nVent ERICO Earth Bar
  • RS Stock No. 277-6240
  • Mfr. Part No. EEB10C506D0A
Each
PHP21,045.64(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 A9V5 MCB, 3P, 25A, Type A, 400-415V AC
  • RS Stock No. 212-103
  • Mfr. Part No. A9V51325
Each
PHP13,648.29(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-416
  • Mfr. Part No. 3VA5210-7GF41-2AA0
Each
PHP169,864.96(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 345-317
  • Mfr. Part No. C10N6TM100
Each
PHP95,400.21(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-476
  • Mfr. Part No. 3VA6210-5JP31-2AA0
Each
PHP203,071.19(exc. VAT)
Temporarily out of stock
Hager RCBO, 10A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 251-2015
  • Mfr. Part No. ADC710F
Each
PHP16,002.94(exc. VAT)
Temporarily out of stock
Phoenix Contact 3 Phase Surge Protector, 2kV, DIN Rail Mount
  • RS Stock No. 890-3720
  • Mfr. Part No. 2905469
Each
PHP48,651.60(exc. VAT)
In Stock
Mersen 900A size 33 FF Square Body Fuse, aR, 700V
  • RS Stock No. 304-2221
  • Mfr. Part No. A300081
Each
PHP25,626.24(exc. VAT)
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