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

33503 Products showing for Fuses & Circuit Breakers

329 of 999+
Temporarily out of stock
Hager NGN MCB, 3P, 20A, 400V AC, 10 Breaking Capacity
  • RS Stock No. 602-160
  • Mfr. Part No. NGN320
Each
PHP12,886.59(exc. VAT)
In Stock
Hinode Electric Co Ltd 125A Bolted Tag Fuse, 77mm
  • RS Stock No. 103-4251
  • Mfr. Part No. 660GH-125
Each
PHP2,147.61(exc. VAT)
Temporarily out of stock
Eaton Busbar Support, xEnergy Series
  • RS Stock No. 247-673
  • Mfr. Part No. 133099 XBBB135
Each
PHP2,177.33(exc. VAT)
In Stock
Eaton, xEnergy MCCB 1P 125A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 628-8004
  • Mfr. Part No. 265723 NZMN2-M125
1 Box of 1
PHP42,618.71(exc. VAT)
Temporarily out of stock
Siemens SENTRON 1 Phase Busbar
  • RS Stock No. 266-507
  • Mfr. Part No. 8US1621-2FK02
1 Pack of 12
PHP14,211.27(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3493
  • Mfr. Part No. 3VA1340-5GF42-0AA0
Each
PHP116,090.34(exc. VAT)
Temporarily out of stock
Siemens SENTRON Plug In Kit for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9373
  • Mfr. Part No. 3VA9323-0KP00
Each
PHP54,941.54(exc. VAT)
In Stock
Eaton 80A British Standard Fuse, A4, 500V ac, 94mm
  • RS Stock No. 413-535
  • Mfr. Part No. CEO80
Each
PHP1,337.83(exc. VAT)
Temporarily out of stock
Hager CDS RCD Switch, 40A, 2 Pole, 30mA, Type F, 230V
  • RS Stock No. 599-841
  • Mfr. Part No. CDS740F
Each
PHP11,378.14(exc. VAT)
Temporarily out of stock
ABB S801C MCB, 1P, 63A Curve K, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-356
  • Mfr. Part No. 2CCS881001R0597
Each
PHP6,233.19(exc. VAT)
Temporarily out of stock
Schneider Electric Flexible Element, 500mm, 40A, KBB Series
  • RS Stock No. 655-015
  • Mfr. Part No. KBB40DF4405TW
Each
PHP40,166.77(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 4P, 2A, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-936
  • Mfr. Part No. 2CDS254001R0278
Each
PHP32,996.00(exc. VAT)
Temporarily out of stock
ABB SU200 M MCB, 4P, 5A, Type Z, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-122
  • Mfr. Part No. 2CDS274337R0358
Each
PHP44,169.07(exc. VAT)
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 354-526
  • Mfr. Part No. C080L4FM
Each
PHP321,394.99(exc. VAT)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-719
  • Mfr. Part No. 3VA6210-7HM41-0AA0
Each
PHP234,594.88(exc. VAT)
Temporarily out of stock
Siemens RCBO, 40A Current Rating, 2P Poles, 300mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 211-9584
  • Mfr. Part No. 5SM2643-6
Each
PHP8,130.71(exc. VAT)
Temporarily out of stock
ABB S800S MCB, 1P, 16A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-860
  • Mfr. Part No. 2CCS861001R0161
Each
PHP5,814.22(exc. VAT)
Currently unavailable
Socomec Fuse Holder Neutral Terminal
  • RS Stock No. 252-3745
  • Mfr. Part No. 17499001
Each
PHP408.24(exc. VAT)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 30A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 341-432
  • Mfr. Part No. NHGL36030
Each
PHP101,003.36(exc. VAT)
Temporarily out of stock
Schneider Electric ComPacT Trip Unit for use with ComPacT NSX100
  • RS Stock No. 654-623
  • Mfr. Part No. C163MG160D
Each
PHP16,999.09(exc. VAT)
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