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

123 of 999+
ABB System Pro M Compact S200 M UC MCB, 3P, 20A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-049
  • Mfr. Part No. 2CDS273061R0487
Each
PHP36,246.32(exc. VAT)
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 3 channels
  • RS Stock No. 156-834
  • Mfr. Part No. 3VA2340-0HM32-0AA0
Each
PHP251,584.20(exc. VAT)
Siemens 5SV43 RCCB, 63A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 328-512
  • Mfr. Part No. 5SV4316-0MB
Each
PHP23,166.24(exc. VAT)
Eaton xComfort Micro/Mini Distribution Board Enclosure
  • RS Stock No. 124-882
  • Mfr. Part No. 177081 MICRO-2
Each
PHP654.44(exc. VAT)
Better World
Schneider Electric Acti 9 Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 806-7222
  • Mfr. Part No. A9XPH312
Each
PHP4,825.76(exc. VAT)
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 25A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9729
  • Mfr. Part No. LV510331
Each
PHP22,981.63(exc. VAT)
Siemens SIRIUS 3 Phase Busbar, 45mm Pitch
  • RS Stock No. 783-9243
  • Mfr. Part No. 3RM1910-1AA
Each
PHP1,170.09(exc. VAT)
Hager Terminal Block
  • RS Stock No. 251-2059
  • Mfr. Part No. KN04N
Each
PHP911.71(exc. VAT)
Better World
Schneider Electric, Compact MCCB 3P 160A, Breaking Capacity 50 kA, DIN Rail Mount
  • RS Stock No. 178-7985
  • Mfr. Part No. LV426783
Each
PHP94,814.41(exc. VAT)
Better World
Schneider Electric Acti 9 3 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2730
  • Mfr. Part No. A9XPH324
Each
PHP6,734.85(exc. VAT)
Better World
Schneider Electric Straight Busbar Trunking, 3m, 25A, KBB Series
  • RS Stock No. 219-8861
  • Mfr. Part No. KBB25ED44305TW
Each
PHP23,730.47(exc. VAT)
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5145
  • Mfr. Part No. 3VA2125-5KP46-0AA0
Each
PHP103,488.97(exc. VAT)
Better World
Schneider Electric Acti9 1 Phase Busbar, 230V, 9mm Pitch
  • RS Stock No. 238-4082
  • Mfr. Part No. A9XPN624
Each (In a Pack of 8)
PHP4,814.24(exc. VAT)
ABB System Pro M Compact S200 M UC MCB, 4P, 15A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-100
  • Mfr. Part No. 2CDS274061R0457
Each
PHP46,153.97(exc. VAT)
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 70 kA
  • RS Stock No. 210-1622
  • Mfr. Part No. 3VA1112-6EF46-0AA0
Each
PHP66,117.54(exc. VAT)
Siemens SENTRON 5SJ4110 MCB, 1P, 10A Curve D, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 300-097
  • Mfr. Part No. 5SJ4110-8HG40
Each
PHP3,896.90(exc. VAT)
Phoenix Contact AB2/SS Fixing Bracket for use with 3 mm x 10 mm or 6 mm x 6 mm busbar
  • RS Stock No. 131-614
  • Mfr. Part No. 404431
1 Pack of 1
PHP292.85(exc. VAT)
ABB S302 MCB, 2P, 8A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 204-241
  • Mfr. Part No. 2CDS382001R0081
Each
PHP18,366.22(exc. VAT)
Better World
Schneider Electric Straight Busbar Trunking, 2m, 40A, Canalis KBB Series
  • RS Stock No. 211-0383
  • Mfr. Part No. KBB40ED2202W
Each
PHP7,913.02(exc. VAT)
Siemens 35A NH Fuse, NH1, 440 - 500V ac/dc
  • RS Stock No. 269-8315
  • Mfr. Part No. 3NA7114
Each (In a Pack of 3)
PHP986.827(exc. VAT)
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