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

313 of 999+
Temporarily out of stock
Siemens 1.25kA Tag Fuse, NH3, 800V
  • RS Stock No. 608-767
  • Mfr. Part No. 3NC3343-6U
1 Pack of 3
PHP55,690.64(exc. VAT)
Temporarily out of stock
Siemens SENTRON Cover Frame for use with 3VA20/21/22
  • RS Stock No. 161-957
  • Mfr. Part No. 3VA9164-0SB20
Each
PHP4,021.77(exc. VAT)
In Stock
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3334
  • Mfr. Part No. A9DV2640
Each
PHP20,211.70(exc. VAT)
In Stock
Circuit-breaker/thermal 3.5 A
  • RS Stock No. 577-269
  • Mfr. Part No. 4400.0011
Each
PHP361.09(exc. VAT)
In Stock
Siemens 160A NH Fuse, NH00, 500V ac
  • RS Stock No. 395-660
  • Mfr. Part No. 3NA3836
Each (In a Pack of 3)
PHP1,473.40(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-177
  • Mfr. Part No. 3VA6580-7KL42-0AA0
Each
PHP654,666.34(exc. VAT)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - R21 2 Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0458
  • Mfr. Part No. R21-2-10.0A-B06CV-V
1 Box of 5
PHP15,470.33(exc. VAT)
Temporarily out of stock
Phoenix Contact Surge Protector, 2.5kA, 150V ac/dc, DIN Rail Mount
  • RS Stock No. 497-863
  • Mfr. Part No. 1109673
Each
PHP1,690.25(exc. VAT)
Temporarily out of stock
Schneider Electric Canalis 3 Phase Busbar, 230-400V
  • RS Stock No. 212-223
  • Mfr. Part No. KBA25ED4300W
1 Pack of 6
PHP41,640.27(exc. VAT)
Temporarily out of stock
Siemens SENTRON Cable for use with N Miniature Circuit Breaker 5SX
  • RS Stock No. 627-125
  • Mfr. Part No. 5ST1292
1 Pack of 50
PHP3,616.59(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8155
  • Mfr. Part No. C40V32D400
Each
PHP269,537.79(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 50A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-439
  • Mfr. Part No. 3VA5150-6ED11-0AA0
Each
PHP14,176.82(exc. VAT)
In Stock
Eaton 20A British Standard Fuse, CT, 690 V, 700 V, 64.3mm
  • RS Stock No. 156-8917
  • Mfr. Part No. 20CT
Each (In a Pack of 5)
PHP603.596(exc. VAT)
Temporarily out of stock
Eaton 80A Centred Tag Fuse, NH1, 690V ac
  • RS Stock No. 182-1474
  • Mfr. Part No. 170M3811D
Each (In a Box of 6)
PHP9,816.84(exc. VAT)
In Stock
Siemens Push Button Circuit Trip for use with Standard rail mounting
  • RS Stock No. 209-5272
  • Mfr. Part No. 5TE4820
Each
PHP3,939.29(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4114 MCB, 1P, 300mA Curve D, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 299-832
  • Mfr. Part No. 5SJ4114-8HG41
Each
PHP5,405.27(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric RCBO, 40A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3350
  • Mfr. Part No. A9DV7640
Each
PHP19,449.78(exc. VAT)
In Stock
ABB, Formula DSA MCCB 1P 125A, Fixed Mount
  • RS Stock No. 237-6137
  • Mfr. Part No. 1SDA066687R1
Each
PHP8,848.23(exc. VAT)
Temporarily out of stock
Mersen 25A British Standard Fuse, 10 x 28mm, 250V ac, 34.6 → 39.4mm
  • RS Stock No. 238-3830
  • Mfr. Part No. X097494
Each
PHP1,314.88(exc. VAT)
Temporarily out of stock
Eaton Fuse Holder Assembly Kit
  • RS Stock No. 258-205
  • Mfr. Part No. 288916 Z-D02/PE-40
1 Pack of 12
PHP239.43(exc. VAT)
1
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