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

249 of 999+
In Stock
RS PRO 200A British Standard Fuse, A4, 415V ac, 93.7mm
  • RS Stock No. 521-2731
Each
PHP2,957.20(exc. VAT)
In Stock
Siemens SENTRON 3 Phase Busbar, 230V, 8.6mm Pitch
  • RS Stock No. 187-5185
  • Mfr. Part No. 5ST3673-0
Each
PHP2,382.33(exc. VAT)
In Stock
Eaton 20A D2 Diazed Fuse, gG, 500V ac
  • RS Stock No. 181-8910
  • Mfr. Part No. 20D27
Each
PHP195.79(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4670
  • Mfr. Part No. 3VA2140-7KP42-0AA0
Each
PHP136,200.47(exc. VAT)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 209-5005
  • Mfr. Part No. 3VA1150-6EF36-0AA0
Each
PHP24,043.80(exc. VAT)
Temporarily out of stock
Schneider Electric Multi9 M9F1 MCB, 1P, 1A Curve D, 415V AC, 72V DC, 3 kA Breaking Capacity
  • RS Stock No. 212-078
  • Mfr. Part No. M9F12101
Each
PHP3,205.26(exc. VAT)
Temporarily out of stock
Schneider Electric ComPacT Cover Frame for use with ComPacT NS630b
  • RS Stock No. 654-847
  • Mfr. Part No. 33280
Each
PHP331,881.93(exc. VAT)
Temporarily out of stock
ABB Tmax XT Conversion Kit for use with Tmax XT
  • RS Stock No. 237-6039
  • Mfr. Part No. 1SDA066288R1 FP XT2 P > FP XT2 W
Each
PHP12,557.16(exc. VAT)
Temporarily out of stock
ABB Tmax T Conversion Kit for use with MCCB
  • RS Stock No. 232-0103
  • Mfr. Part No. 1SDA054843R1 DEBRO PMP T5 400 3P
Each
PHP11,504.05(exc. VAT)
In Stock
MX shunt trip release, Compact NSX, Powe
  • RS Stock No. 248-4112
  • Mfr. Part No. LV429390
Each
PHP9,536.55(exc. VAT)
In Stock
RS PRO MCB/RCBO Lock for use with MCB, RCBO, RCCB, Main Isolator
  • RS Stock No. 798-2233
Each (In a Pack of 3)
PHP163.077(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 40A Current Rating, 3P Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3302
  • Mfr. Part No. A9DK5740
Each
PHP32,914.26(exc. VAT)
In Stock
Better World
Schneider Electric 220 → 240V ac Undervoltage Release Circuit Trip for use with C120 Series, C60 Series, ID
  • RS Stock No. 776-2941
  • Mfr. Part No. A9N26963
Each
PHP12,066.65(exc. VAT)
Temporarily out of stock
Siemens 1 Phase Surge Protector, Plug In Mount
  • RS Stock No. 213-1317
  • Mfr. Part No. 5SD7418-1
Each
PHP21,162.26(exc. VAT)
In Stock
Schneider Electric Acti 9 Cover for use with ARA, IC60, iDPN Vigi, iLD, iSW, ISW-NA, RCA, Reflex iC60
  • RS Stock No. 791-2786
  • Mfr. Part No. A9A26982
Each (In a Pack of 12)
PHP212.336(exc. VAT)
Temporarily out of stock
ABB Tmax XT Undervoltage Release for use with Circuit Breaker
  • RS Stock No. 231-9366
  • Mfr. Part No. 1SDA104958R1 YU-C XT5-XT6 F/P 220.240Va
Each
PHP12,257.18(exc. VAT)
Temporarily out of stock
Schneider Electric Acti9 3, 3+N Phase Extension Box, 160 A
  • RS Stock No. 339-641
  • Mfr. Part No. SEA9PNI1603
Each
PHP86,382.76(exc. VAT)
In Stock
Siemens 20A Diazed Fuse, gG, 500/440V ac/dc
  • RS Stock No. 163-281
  • Mfr. Part No. 5SB2711
1 Pack of 25
PHP1,250.44(exc. VAT)
Temporarily out of stock
Schneider Electric Linergy Busbar Connector, 690V
  • RS Stock No. 655-070
  • Mfr. Part No. LVS04413
Each
PHP87,546.91(exc. VAT)
Temporarily out of stock
Eaton xEffect FAZ MCB, 1P, 5A Curve C, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 243-521
  • Mfr. Part No. 102083 FAZ-C5/1-NA
1 Pack of 2
PHP6,793.91(exc. VAT)
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