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

243 of 999+
Temporarily out of stock
Phoenix Contact Surge Arrester, 4.2kV, DIN Rail Mount
  • RS Stock No. 488-212
  • Mfr. Part No. 1466777
Each
PHP17,882.50(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON 5SV3xxx RCCB, 63A, 4 Pole, 500mA, Type B, 400V ac
  • RS Stock No. 241-4449
  • Mfr. Part No. 5SV3746-4
Each
PHP68,661.06(exc. VAT)
Temporarily out of stock
Siemens ALPHA Busbar
  • RS Stock No. 629-035
  • Mfr. Part No. 8GK9733-0KK40
Each
PHP4,615.21(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 Acti9 Reflex MCB, 2P, 16A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 340-852
  • Mfr. Part No. A9C63216
Each
PHP23,679.42(exc. VAT)
Temporarily out of stock
ABB SU200 M MCB, 1P, 30A, Type Z, 277V AC, 48V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-157
  • Mfr. Part No. 2CDS271337R0528
Each
PHP8,810.73(exc. VAT)
Temporarily out of stock
Hager NEN MCB, 4P, 16A Curve B, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4699
  • Mfr. Part No. NEN416
Each
PHP18,473.34(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 2P, 40A, Type A, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-585
  • Mfr. Part No. 5SY4540-5
Each
PHP9,024.97(exc. VAT)
Unavailable
RS PRO Non-Resettable Surface Mount Fuse 500mA, 63V ac/dc
  • RS Stock No. 764-9390P
Each (Supplied on a Reel)
PHP3.227(exc. VAT)
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 25A, 4 Pole, 300mA, Type A, 500V ac
  • RS Stock No. 211-9719
  • Mfr. Part No. 5SV3652-6
Each
PHP18,748.67(exc. VAT)
In Stock
Better World
ABB, Tmax XT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 236-6631
  • Mfr. Part No. 1SDA068176R1 XT4L 250 BLOC FF
Each
PHP43,145.01(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 30A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-567
  • Mfr. Part No. 2CDS271061R0527
Each
PHP10,485.59(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 20A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-235
  • Mfr. Part No. 3VA5120-6EC31-0AA0
Each
PHP32,102.70(exc. VAT)
Temporarily out of stock
Schneider Electric Multi9 M9F MCB Mini Circuit Breaker, 3P, 40A Curve C, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 653-833
  • Mfr. Part No. M9F52340
Each
PHP13,138.39(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric iID RCCB, 80A, 4 Pole, 30mA, Type B-SI, 400V ac
  • RS Stock No. 248-3721
  • Mfr. Part No. A9Z61480
Each
PHP188,567.32(exc. VAT)
In Stock
ABB FH200 RCCB, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 183-3638
  • Mfr. Part No. 2CSF204023R3250
Each
PHP7,791.40(exc. VAT)
Currently unavailable
Bourns 1.5A Resettable Fuse, 33V
  • RS Stock No. 647-8083P
  • Mfr. Part No. MF-SM150/33-2
Each (Supplied on a Reel)
PHP23.067(exc. VAT)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - 229 2 Pole 125V dc Voltage Rating Panel Mount, 60A Current Rating
  • RS Stock No. 275-0073
  • Mfr. Part No. 229-2-1-53-2-2-60
Each
PHP12,869.21(exc. VAT)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 60A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-855
  • Mfr. Part No. 2CDS272061R0587
Each
PHP33,353.22(exc. VAT)
Temporarily out of stock
Eaton Eaton Moeller Enclosure for use with PKZM4
  • RS Stock No. 272-2298
  • Mfr. Part No. 225524 CI-K4-PKZ4-G
Each
PHP5,202.77(exc. VAT)
In Stock
Bourns 80A Tag Fuse, 38mm, 170V dc, 24.1mm
  • RS Stock No. 254-4227
  • Mfr. Part No. PF-NT2-80
Each
PHP1,892.56(exc. VAT)
1
243
1676
Results per page

Related links