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

321 of 999+
Temporarily out of stock
Eaton 6A Bolted Tag Fuse, 1.2 kV ac, 660V dc, 124mm
  • RS Stock No. 181-8434
  • Mfr. Part No. TAC6
Each (In a Box of 10)
PHP2,930.48(exc. VAT)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 50A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-709
  • Mfr. Part No. 3VA5250-6ED31-0AA0
Each
PHP62,167.64(exc. VAT)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA57, 3VA67 Series
  • RS Stock No. 263-555
  • Mfr. Part No. 3VA9772-0JJ43
1 Kit
PHP28,811.18(exc. VAT)
Temporarily out of stock
Siemens 525A Tag Fuse, NH3mm, 1.3kV, 210mm
  • RS Stock No. 627-023
  • Mfr. Part No. 3NB1337-4KK15
1 Pack of 2
PHP82,618.79(exc. VAT)
Temporarily out of stock
Siemens Auxiliary Release Shunt trip for use with 3VA1, 3VA20-26
  • RS Stock No. 275-968
  • Mfr. Part No. 3VA9988-0BL10
Each
PHP8,210.82(exc. VAT)
In Stock
Hager CFC RCD Switch, 63A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 251-2033
  • Mfr. Part No. CFC764F
Each
PHP19,045.52(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 3A Curve C, 400V AC, 60V DC, 50 kA Breaking Capacity
  • RS Stock No. 610-409
  • Mfr. Part No. 5SY8603-7
Each
PHP17,829.81(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SJ4208 MCB, 2P, 8A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-959
  • Mfr. Part No. 5SJ4208-8HG42
Each
PHP15,362.70(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS Stock No. 776-2825
  • Mfr. Part No. A9XPE210
Each
PHP697.47(exc. VAT)
Temporarily out of stock
Hager Hager NSN Circuit Breaker, 3P, 20A Curve D, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-722
  • Mfr. Part No. NSN320
Each
PHP22,044.91(exc. VAT)
In Stock
Siemens 3ZY1122 Removable Terminal for use with SIRIUS devices
  • RS Stock No. 203-3947
  • Mfr. Part No. 3ZY1122-1BA00
Each (In a Pack of 6)
PHP664.21(exc. VAT)
Temporarily out of stock
RCBO, 40A Current Rating, 1+N Poles, 300mA Trip Sensitivity, Type B, xEffect Range
  • RS Stock No. 252-760
  • Mfr. Part No. 193505 FRBmM-B40/1N/03-F
Each
PHP15,395.29(exc. VAT)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 9 kA, Plug In
  • RS Stock No. 246-896
  • Mfr. Part No. 192302 NZMH3-4-PX400/VAR-SVE
Each
PHP346,467.31(exc. VAT)
In Stock
ABB Tmax XT Handle, Lockable for use with Circuit Breaker
  • RS Stock No. 232-0191
  • Mfr. Part No. 1SDA066475R1 RHD XT1-XT3 F/P
Each
PHP7,763.01(exc. VAT)
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 2P, 50A, Type A, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-571
  • Mfr. Part No. 5SY4250-5
Each
PHP15,848.72(exc. VAT)
Temporarily out of stock
Phoenix Contact CTM Adapter for use with CTM Range
  • RS Stock No. 131-455
  • Mfr. Part No. 2905282
Each
PHP61,492.68(exc. VAT)
In Stock
Phoenix Contact 2 Phase Surge Protector, 5kA, DIN Rail Mount
  • RS Stock No. 201-5437
  • Mfr. Part No. 2908438
Each
PHP6,769.80(exc. VAT)
Temporarily out of stock
ABB SU200 M MCB, 2P, 15A, Type Z, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-041
  • Mfr. Part No. 2CDS272337R0458
Each
PHP20,330.90(exc. VAT)
Temporarily out of stock
Hager NRN MCB, 4P, 40A Curve C, 415V AC, 20 kA Breaking Capacity
  • RS Stock No. 597-950
  • Mfr. Part No. NRN440
Each
PHP29,332.72(exc. VAT)
In Stock
RS PRO 15A Blade Fuse Block, 250V
  • RS Stock No. 188-4610
Each
PHP28.67(exc. VAT)
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