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

33476 Products showing for Fuses & Circuit Breakers

79 of 999+
Limited stock
nVent ERICO Neutral Busbar Busbar
  • RS Stock No. 646-807
  • Mfr. Part No. 568680
Each
PHP1,224.61(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 K60N MCB Mini Circuit Breaker, 3P, 63A Curve C, 400V AC, 6000 A Breaking Capacity
  • RS Stock No. 588-878
  • Mfr. Part No. A9K02363
Each
PHP2,070.99(exc. VAT)
Temporarily out of stock
Siemens 125A Tag Fuse, NH2, 400V ac
  • RS Stock No. 144-085
  • Mfr. Part No. 3NA6232-4
1 Pack of 3
PHP4,090.80(exc. VAT)
Limited stock
Limitor Thermal Fuse +55°C 2.5 A, 250V ac
  • RS Stock No. 176-9104
  • Mfr. Part No. P82 55 05100
Each
PHP363.70(exc. VAT)
In Stock
Siemens SENTRON 3 Phase Busbar, 18mm Pitch
  • RS Stock No. 202-7131
  • Mfr. Part No. 5ST3738
Each
PHP700.09(exc. VAT)
In Stock
Mersen Surge Protector
  • RS Stock No. 179-3071
  • Mfr. Part No. 83230511 / STMT23-20K275V-SP-SM
Each
PHP10,139.44(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 874-4256
  • Mfr. Part No. 3VA1125-4EF36-0AA0
Each
PHP25,232.98(exc. VAT)
Temporarily out of stock
ABB S800U MCB, 3P, 15A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 141-251
  • Mfr. Part No. 2CCS863017R0457
Each
PHP26,744.24(exc. VAT)
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 3P 32A, Fixed Mount
  • RS Stock No. 236-6700
  • Mfr. Part No. 1SDA068335R1 XT4H 160 TMD 32A FF
Each
PHP50,535.46(exc. VAT)
In Stock
Schneider Electric RCBO, 20A Current Rating, 3P Poles, 30mA Trip Sensitivity, Type A, Acti9 Range
  • RS Stock No. 212-167
  • Mfr. Part No. A9D17320
Each
PHP37,175.99(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 260-7500
  • Mfr. Part No. C10W3TM063
Each
PHP90,442.52(exc. VAT)
Temporarily out of stock
HENSEL ENYSTAR Distribution Board, 63 A
  • RS Stock No. 117-556
  • Mfr. Part No. KV 3636
Each
PHP10,291.53(exc. VAT)
Unavailable
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 4P 100A, Fixed Mount
  • RS Stock No. 221-0991
  • Mfr. Part No. LV430886
Each
PHP142,684.49(exc. VAT)
Temporarily out of stock
Schneider Electric Compact Undervoltage Release for use with NS630b
  • RS Stock No. 354-356
  • Mfr. Part No. 33822
Each
PHP31,523.69(exc. VAT)
Temporarily out of stock
Eaton Eaton Moeller 3 Phase Busbar, 600V, 17.6mm Pitch
  • RS Stock No. 123-038
  • Mfr. Part No. 171133 Z-BB/UL25/3P1MU/57
Each
PHP2,746.89(exc. VAT)
Temporarily out of stock
ABB, SACE FORMULA MCCB Molded Case Circuit Breaker 1P 63A, Fixed Mount
  • RS Stock No. 231-9300
  • Mfr. Part No. 1SDA075871R1 KIT FC Cu XT1 14-1/0 AWG 6
Each
PHP11,850.92(exc. VAT)
In Stock
ABB PS3 3 Phase Busbar, 400V
  • RS Stock No. 231-9645
  • Mfr. Part No. 2CDL230489R1606 PS3/6/16BP
1 Box of 1
PHP1,373.51(exc. VAT)
In Stock
RS PRO 50A Slotted Tag Fuse, 17.4 x 42mm, 240V, 42mm
  • RS Stock No. 188-4627
Each
PHP1,838.77(exc. VAT)
In Stock
Eaton 50A British Standard Fuse, FE, 690 V ac, 500V dc, 63.5mm
  • RS Stock No. 156-8967
  • Mfr. Part No. 50FE
Each
PHP3,330.75(exc. VAT)
Temporarily out of stock
Schneider Electric QO110C10RCB RCCB, 10A, 1 Pole, Type C, 240V
  • RS Stock No. 214-755
  • Mfr. Part No. QO110C10RCBO30F
Each
PHP32,848.26(exc. VAT)
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