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

77 of 999+
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 428-721
  • Mfr. Part No. C100H320FM
Each
PHP766,946.38(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 60A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-454
  • Mfr. Part No. 3VA5160-6ED41-0AA0
Each
PHP37,278.69(exc. VAT)
Temporarily out of stock
Schneider Electric, Powerpact4 MCCB 1P 30A, Breaking Capacity 25 kA, Panel Mount
  • RS Stock No. 517-4780
  • Mfr. Part No. MGP0301L2
Each
PHP8,728.22(exc. VAT)
Temporarily out of stock
Siemens 3 Phase Surge Protector, 50kA, DIN Rail Mount
  • RS Stock No. 211-0183
  • Mfr. Part No. 5SD7414-3
Each
PHP48,980.10(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 Connector Monoconnect for use with Acti 9/Multi 9, Horizontal Comb Busbar for 18 mm Pitch
  • RS Stock No. 806-7405
  • Mfr. Part No. A9XPCM04
Each
PHP4,722.63(exc. VAT)
Temporarily out of stock
Better World
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 232-0270
  • Mfr. Part No. 1SDA068092R1 XT4N 250 TMA 250A FF
Each
PHP57,436.15(exc. VAT)
Unavailable
Merlin Gerin RED RCCB, 40A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 145-392
  • Mfr. Part No. 18690
Each
PHP41,895.85(exc. VAT)
In Stock
Eaton Eaton Moeller FAZ-DC MCB Mini Circuit Breaker, 2P, 16A Curve B, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 125-835
  • Mfr. Part No. 176081 FAZ-B16/2-DC
Each
PHP10,694.64(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9682
  • Mfr. Part No. 3VA11106FD460AA0
Each
PHP46,001.00(exc. VAT)
In Stock
Standard Din Rail Terminal
  • RS Stock No. 482-1205
  • Mfr. Part No. 1SNA190008R0700
Each
PHP1,782.46(exc. VAT)
Temporarily out of stock
Schneider Electric R9PR RCCB, 40A, 3 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 276-8973
  • Mfr. Part No. R9PRA440
Each
PHP18,105.84(exc. VAT)
In Stock
Phoenix Contact Surge Protector, 5kA, DIN Rail Mount
  • RS Stock No. 241-6060
  • Mfr. Part No. 2801593
Each
PHP9,692.96(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 600A, Fixed Mount
  • RS Stock No. 260-8242
  • Mfr. Part No. C63S3TM600D
Each
PHP194,141.05(exc. VAT)
Temporarily out of stock
Siemens ALPHA Distribution Board, 18 Way
  • RS Stock No. 211-6079
  • Mfr. Part No. 8GB1371-3
Each
PHP4,248.29(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 250A, Fixed Mount
  • RS Stock No. 260-7905
  • Mfr. Part No. C25H32D250
Each
PHP160,455.40(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 178-8162
  • Mfr. Part No. LV426267
Each
PHP26,085.77(exc. VAT)
Limited stock
Limitor Thermal Fuse +130°C 5 A, 250V ac
  • RS Stock No. 124-5061
  • Mfr. Part No. A4-5AF
Each (In a Pack of 5)
PHP74.59(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-7979
  • Mfr. Part No. C25R42D250
Each
PHP221,932.06(exc. VAT)
In Stock
Hager NFN MCB, 2P, 10A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4712
  • Mfr. Part No. NFN210
Each
PHP6,253.68(exc. VAT)
Temporarily out of stock
Schneider Electric ComPacT NSX400...630 Vigi add-on for use with Wiring
  • RS Stock No. 119-201
  • Mfr. Part No. LV432466
Each
PHP175,955.25(exc. VAT)
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