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

232 of 999+
Temporarily out of stock
ABB, T7H MCCB 4P 1kA, Fixed Mount
  • RS Stock No. 237-6020
  • Mfr. Part No. 1SDA062779R1 T7H 1000A PR232-LSI FF
Each
PHP356,252.33(exc. VAT)
Temporarily out of stock
Hager BDC RCD, 40A, 4 Pole, 30mA, Type AC
  • RS Stock No. 144-4850
  • Mfr. Part No. BDC840
Each
PHP25,571.86(exc. VAT)
In Stock
Mersen 80A NH Fuse, NH000, 690V ac
  • RS Stock No. 448-3314
  • Mfr. Part No. Q320059
Each
PHP2,807.82(exc. VAT)
Temporarily out of stock
Better World
ABB, XT4H MCCB 3P 40A, Fixed Mount
  • RS Stock No. 236-6790
  • Mfr. Part No. 1SDA068526R1 XT4H 160 Ekip LSIG 40A FF
Each
PHP128,266.80(exc. VAT)
In Stock
ABB RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C
  • RS Stock No. 183-3701
  • Mfr. Part No. 2CSR245041R1164
Each
PHP7,252.71(exc. VAT)
Temporarily out of stock
ABB S800S MCB, 1P, 50A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-462
  • Mfr. Part No. 2CCS861001R0577
Each
PHP8,227.46(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric 110 → 130 V ac, 125V dc Circuit Trip for use with TeSys GV4
  • RS Stock No. 211-2533
  • Mfr. Part No. GV4AS137
Each
PHP6,954.02(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9604
  • Mfr. Part No. 3VA10504ED360AA0
Each
PHP21,417.31(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4140 MCB, 1P, 40A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 300-024
  • Mfr. Part No. 5SJ4140-8HG40
Each
PHP5,146.43(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 125A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9693
  • Mfr. Part No. 3VA11123ED120AA0
Each
PHP20,189.05(exc. VAT)
In Stock
Appliance Safety Switch/Thermal
  • RS Stock No. 577-470
  • Mfr. Part No. 2-5700-IG1-P10-5A
Each
PHP1,206.93(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-444
  • Mfr. Part No. 3VA5150-6ED31-0AA0
Each
PHP28,802.51(exc. VAT)
Temporarily out of stock
RS PRO Single Phase Industrial Surge Protector, 40kA, 1.25kV, DIN Rail Mount
  • RS Stock No. 101-799
Each
PHP7,770.26(exc. VAT)
In Stock
Bourns 0.5A Resettable Fuse, 60V
  • RS Stock No. 647-8027
  • Mfr. Part No. MF-SM050-2
Each (In a Pack of 10)
PHP24.552(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 6.3A, Fixed Mount
  • RS Stock No. 260-9493
  • Mfr. Part No. C10N3MA007
Each
PHP48,975.41(exc. VAT)
In Stock
Littelfuse 355A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS Stock No. 226-1027
  • Mfr. Part No. 157.5701.6351
Each
PHP496.58(exc. VAT)
Temporarily out of stock
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-746
  • Mfr. Part No. A9DH3632
Each
PHP19,582.75(exc. VAT)
In Stock
Siemens 300A Centred Tag Fuse, NH3, 500V ac
  • RS Stock No. 203-2103
  • Mfr. Part No. 3NA3350
Each (In a Pack of 3)
PHP3,091.57(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 240-926
  • Mfr. Part No. 191625 NZMN2-VX100-BT
Each
PHP74,557.19(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-8089
  • Mfr. Part No. C40F32D250
Each
PHP258,278.03(exc. VAT)
1
232
1676
Results per page

Related links