Power Factor Correction Capacitors

The power factor of a circuit, for individual equipment or for a larger power supply, is the measure used to determine the efficiency of the circuit. It is calculated using the real power (kW) and reactive power (kVAr) of a circuit, with the real power being that which is actually used to complete the task at hand and the reactive power being that which does not contribute to the task. The higher the power factor (between 0 and 1), the more efficient the circuit, with anything above 0.95 being considered highly efficient. For larger-scale circuits with a higher power load, such as a building's power supply, having a higher power factor results in lower excess charges from power suppliers.

What are power factor correction capacitors?

Power factor correction capacitors are used to increase the power factor of a circuit, bringing the measure closer to 1 and making the system more efficient. Capacitors are used when a lagging current - which is often found in inductive load circuits such as AC induction motors, arc welders, fluorescent lighting and air conditioning - causes the current and voltage to fall out of phase with each other and therefore generates more reactive power. Capacitors correct these variations in current and voltage input, bringing the two back to being closer in phase and improving the efficiency.

RS Components offer a range of power factor correction capacitors from industry-leading brands, including EPCOS, KEMET, Vishay and Wurth Elektronik.

Why is power factor correction important?

Power factor correction has many benefits on both the electrical systems being supplied and the bill payers. By bringing the efficiency up and reducing reactive power, grid instability can be reduced, as can costs. By reducing the reactive power generated in a system or piece of equipment, general power consumption will also decrease and this in turn leads to cost savings. Electricity bills for larger companies and factories can include additional charges, including capacitor charges and reactive power charges, which will also come down when power factor correction equipment is applied.


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Description Price Voltage kvar 50Hz kvar 60Hz Number of Phases Capacitance Dielectric Material Mounting Type Series Length Width Height Minimum Operating Temperature Maximum Operating Temperature Tolerance Minus
RS Stock No. 136-6321
Mfr. Part No.B25675A4122J515
BrandEPCOS
HK$1,011.14
Each
units
415V ac 12.5kvar 15kvar - 3 x 77µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 135-3597
Mfr. Part No.PhMKP400.3.25,00-A84
BrandVishay
HK$1,772.543
Each (In a Box of 4)
units
400V ac - - - 3 x 165.8µF - Plug In phMKP - - 265mm - +65°C -
RS Stock No. 136-6322
Mfr. Part No.B25675A4252J080
BrandEPCOS
HK$1,550.54
Each
units
480V ac 25kvar 30kvar - 3 x 115.1µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 192-3560
Mfr. Part No.B25161S0010M000
BrandEPCOS
HK$7,605.944
Each (In a Box of 10)
units
36kV ac - - 1 100nF Polypropylene Stud Mount MV APP 250mm 120mm 760mm -25°C - -
RS Stock No. 135-3599
Mfr. Part No.PhMKP440.3.28,10-A84
BrandVishay
HK$1,807.89
Each (In a Box of 4)
units
440V ac - - - 3 x 154µF - Screw Mount phMKP - - 265mm - +65°C -
RS Stock No. 135-3608
Mfr. Part No.GLI 700-230 B
BrandVishay
HK$2,694.03
Each (In a Box of 4)
units
700V dc - - - 230µF - Plug In GLI - - 68mm -40°C +80°C -
RS Stock No. 187-5367
Mfr. Part No.PhMKP400.3.12,50-S64
BrandVishay
HK$1,832.141
Each (In a Box of 9)
units
400V ac 12.5kvar - 3 3 x 82.9µF Polypropylene Stud Mount PhMKP - 67.6mm 265mm - +65°C -5%
RS Stock No. 136-6323
Mfr. Part No.B25675A4152J015
BrandEPCOS
HK$1,238.08
Each
units
415V ac 15kvar 18kvar - 3 x 92.4µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 135-3609
Mfr. Part No.GLI 900-100 I
BrandVishay
HK$1,974.853
Each (In a Box of 4)
units
900V dc - - - 100µF - Plug In GLI - - 56mm -40°C +80°C -
New
RS Stock No. 211-2690
Mfr. Part No.BLRCH155A186B48
HK$922.85
Each
units
480V ac 15.5kvar 18.6kvar 3 - - - - - - - - - -
RS Stock No. 187-5372
Mfr. Part No.PhMKP525.3.12,50-S84
BrandVishay
HK$1,147.433
Each (In a Box of 4)
units
525V ac 12.5kvar - 3 3 x 48.1µF Polypropylene Stud Mount PhMKP - 88.2mm 190mm - +65°C -5%
RS Stock No. 136-4912
Mfr. Part No.B25675A4122J500
BrandEPCOS
HK$954.763
Each (In a Box of 9)
units
400V ac 12.5kvar 15kvar - 3 x 82.9µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 192-3561
Mfr. Part No.B25161S0012M000
BrandEPCOS
HK$7,605.944
Each (In a Box of 10)
units
36kV ac - - 1 125nF Polypropylene Stud Mount MV APP 250mm 120mm 760mm -25°C - -
RS Stock No. 135-3602
Mfr. Part No.PhMKP525.3.25,00-A84
BrandVishay
HK$1,625.148
Each (In a Box of 4)
units
525V ac - - - 3 x 96.2µF Polypropylene Screw Mount phMKP - - 265mm - +65°C -5%
New
RS Stock No. 211-2806
Mfr. Part No.VLVAF5N03520AB
HK$184,058.10
Each
units
400V ac 500kvar - 3 - - - - - - - - - -
RS Stock No. 187-5368
Mfr. Part No.PhMKP400.3.20,00-S84
BrandVishay
HK$2,116.79
Each (In a Box of 4)
units
400V ac 20kvar - 3 3 x 132.6µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 136-6325
Mfr. Part No.B25675A4252J015
BrandEPCOS
HK$1,270.23
Each
units
415V ac 25kvar 30kvar - 3 x 154µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 192-3567
Mfr. Part No.B25161T0025M000
BrandEPCOS
HK$12,667.333
Each (In a Box of 10)
units
40kV ac - - 1 250nF Polypropylene Stud Mount MV APP 350mm 120mm - -25°C - -
RS Stock No. 136-5111
Mfr. Part No.C9TS5MD6108AARX
BrandKEMET
HK$641.483
Each (In a Box of 12)
units
415V ac - - - 3 x 108µF - Stud Mount C9T - - 280mm -25°C +55°C -5%
RS Stock No. 192-3571
Mfr. Part No.B32305A4252B080
BrandEPCOS
HK$1,201.275
Each (In a Box of 4)
units
480V ac - - 3 115µF Polypropylene Stud Mount MKD - 136 Dia.mm 245mm -40°C +65°C -5%