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

33491 Products showing for Fuses & Circuit Breakers

4 of 999+
Siemens, SENTRON MCCB 3P 175A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 147-474
  • Mfr. Part No. 3VA5217-6EC31-1AA0
Each
PHP134,592.79(exc. VAT)
Hager NFN MCB, 1P, 3A, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 602-156
  • Mfr. Part No. NFN103
Each
PHP4,196.12(exc. VAT)
ABB MCCB Molded Case Circuit Breaker 3P 500A, Fixed Mount
  • RS Stock No. 250-4187
  • Mfr. Part No. 1SDA054465R1
Each
PHP277,060.53(exc. VAT)
Better World
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 25 kA, 36 kA, Fixed Mount
  • RS Stock No. 874-4137
  • Mfr. Part No. 3VA1110-4ED36-0AA0
Each
PHP22,201.37(exc. VAT)
Contactum Contactum 3 Phase Distribution Board, 12 Way, 125 A
  • RS Stock No. 201-0752
  • Mfr. Part No. DDB125PIR12
Each
PHP23,973.34(exc. VAT)
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 1.25kA, Fixed Mount
  • RS Stock No. 232-0157
  • Mfr. Part No. 1SDA062866R1 T7S 1250A PR231-LS/I FF
Each
PHP188,497.83(exc. VAT)
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV3P 3 Pole 690V ac Voltage Rating DIN Rail Mount, 73A Current Rating
  • RS Stock No. 188-4747
  • Mfr. Part No. GV3P73
Each
PHP15,189.27(exc. VAT)
Sensata Airpax Airpax Thermal Circuit Breaker - PR21 2 Pole Panel Mount, 20A Current Rating
  • RS Stock No. 275-0443
  • Mfr. Part No. PR21-4-20.0A-XX-V
Each
PHP3,663.00(exc. VAT)
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 4P 40A, Breaking Capacity 25kA
  • RS Stock No. 260-9723
  • Mfr. Part No. LV510313
Each
PHP34,429.00(exc. VAT)
ABB System Pro M Compact S200 M UC MCB, 4P, 63A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-437
  • Mfr. Part No. 2CDS274061R0607
Each
PHP78,511.36(exc. VAT)
Siemens SENTRON 5SY4 MCB, 2P, 2A Curve B, 400V AC, 60V DC, 35 kA Breaking Capacity
  • RS Stock No. 610-308
  • Mfr. Part No. 5SY4202-6
Each
PHP5,290.24(exc. VAT)
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8199
  • Mfr. Part No. C63F32D630
Each
PHP316,254.70(exc. VAT)
Schneider Electric EasyPact Electronic Circuit Breaker 75A, Fixed
  • RS Stock No. 122-419
  • Mfr. Part No. LV510861
Each
PHP4,639.23(exc. VAT)
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 500V ac
  • RS Stock No. 287-5799
  • Mfr. Part No. N218213
Each
PHP517.86(exc. VAT)
Better World
Siemens RCBO, 8A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 151-1213
  • Mfr. Part No. 5SU1356-7KK08
Each
PHP9,490.00(exc. VAT)
Schneider Electric, EasyPact MCCB 3P 80A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 269-6109
  • Mfr. Part No. EZC100H3080
Each
PHP20,409.71(exc. VAT)
Schneider Electric, PowerPact Circuit breaker 3P 30A, Breaking Capacity 35 kA, DIN Rail Mount
  • RS Stock No. 357-068
  • Mfr. Part No. BGF36030
Each
PHP72,552.87(exc. VAT)
WJ Furse Earth Rod
  • RS Stock No. 153-2966
  • Mfr. Part No. 7TCA083120R0011 RB005
Each (In a Pack of 10)
PHP1,909.652(exc. VAT)
ABB, Tmax XT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 237-6231
  • Mfr. Part No. 1SDA067074R1 XT2N 160 Ekip LSIG 63A FF
Each
PHP101,734.35(exc. VAT)
Eaton 3A Cartridge Fuse, 0.41 x 1.5in, 600V ac
  • RS Stock No. 261-723
  • Mfr. Part No. FNQ-R-3
1 Pack of 10
PHP37,166.87(exc. VAT)
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