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

165 of 999+
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 239-782
  • Mfr. Part No. 192341 NZMN3-PX630-SVE
Each
PHP271,103.71(exc. VAT)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 80A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 346-679
  • Mfr. Part No. NHGL36080
Each
PHP139,816.35(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 25A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-700
  • Mfr. Part No. IL0253P36
Each
PHP40,503.43(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 9 kA, Plug In
  • RS Stock No. 231-922
  • Mfr. Part No. 111731 NZMH3-VE400-BT
Each
PHP230,269.54(exc. VAT)
In Stock
Schneider Electric Acti 9 Safety Transformer for use with Acti9
  • RS Stock No. 247-1921
  • Mfr. Part No. A9A15222
Each
PHP9,031.18(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 50A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-757
  • Mfr. Part No. IL0503P36
Each
PHP40,503.43(exc. VAT)
Temporarily out of stock
ABB ZLS728 Spare Parts for use with ZLS728
  • RS Stock No. 141-045
  • Mfr. Part No. 2CCS400900R0101
Each
PHP1,929.54(exc. VAT)
Temporarily out of stock
Siemens SENTRON Communication Module for use with 3VA2 400/630/1000
  • RS Stock No. 210-9383
  • Mfr. Part No. 3VA9387-0TB10
Each
PHP40,227.30(exc. VAT)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with Terminal Block
  • RS Stock No. 629-175
  • Mfr. Part No. 8GK4100-7KK22
Each
PHP21,278.37(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 200A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 230-375
  • Mfr. Part No. 113269 NZMN2-4-A200-SVE
Each
PHP126,168.06(exc. VAT)
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2317
  • Mfr. Part No. 2CCF800229R0001
Each
PHP592.46(exc. VAT)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA, 3 channels
  • RS Stock No. 156-770
  • Mfr. Part No. 3VA2463-7JQ32-0AA0
Each
PHP334,953.59(exc. VAT)
In Stock
Eaton 16A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 414-639
  • Mfr. Part No. NIT16
Each (In a Pack of 5)
PHP481.466(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4567
  • Mfr. Part No. 3VA2125-7JP46-0AA0
Each
PHP118,901.10(exc. VAT)
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 40A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 211-9678
  • Mfr. Part No. 5SV3614-8KL
Each
PHP10,903.48(exc. VAT)
Temporarily out of stock
ABB S302 MCB, 2P, 10A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-693
  • Mfr. Part No. 2CDS382001R0101
Each
PHP16,091.50(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9332
  • Mfr. Part No. 3VA1140-5GD42-0AA0
Each
PHP30,431.79(exc. VAT)
Temporarily out of stock
Siemens SENTRON Connection Unit
  • RS Stock No. 277-0817
  • Mfr. Part No. 3WA9111-0AV11
Each
PHP1,789.36(exc. VAT)
Temporarily out of stock
Better World
ABB, XT2V MCCB 4P 12.5A, Fixed Mount
  • RS Stock No. 236-7439
  • Mfr. Part No. 1SDA067702R1 XT2V 160 TMD 12.5A FF
Each
PHP79,786.36(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3791
  • Mfr. Part No. 3VA2163-5HL46-0AA0
Each
PHP52,779.55(exc. VAT)
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