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. 192-3580
Mfr. Part No.B32305A5282B025
BrandEPCOS
SGD289.01
Each (In a Box of 4)
units
525V ac - - 3 108µF Polypropylene Stud Mount MKD - 136 Dia.mm 230mm -40°C +65°C -5%
RS Stock No. 192-3541
Mfr. Part No.B25161C0050M000
BrandEPCOS
SGD632.062
Each (In a Box of 10)
units
3.6kV ac - - 1 500nF Polypropylene Stud Mount MV APP 175mm 115mm 340mm -25°C - -
RS Stock No. 136-4927
Mfr. Part No.B25675A4152J080
BrandEPCOS
SGD154.413
Each (In a Box of 6)
units
480V ac 15kvar 18kvar - 3 x 69.1µF - Stud Mount MKK - - 207mm -40°C +60°C -5%
RS Stock No. 135-3597
Mfr. Part No.PhMKP400.3.25,00-A84
BrandVishay
SGD293.018
Each (In a Box of 4)
units
400V dc - - - 3 x 165.8µF - Plug In phMKP - - 265mm - +65°C -
RS Stock No. 136-5127
Mfr. Part No.C9TS6MD6110AARX
BrandKEMET
SGD91.64
Each
units
440V ac - - - 3 x 110µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-4911
Mfr. Part No.B25675A4052J000
BrandEPCOS
SGD121.813
Each (In a Box of 6)
units
400V ac 5kvar 6kvar - 3 x 33.2µF - Stud Mount MKK - - 164mm -40°C +60°C -5%
RS Stock No. 192-3568
Mfr. Part No.B25161T0050M000
BrandEPCOS
SGD2,967.555
Each (In a Box of 10)
units
40kV ac - - 1 500nF Polypropylene Stud Mount MV APP 350mm 185mm - -25°C - -
RS Stock No. 192-3554
Mfr. Part No.B25161L0050O000
BrandEPCOS
SGD1,914.12
Each (In a Box of 10)
units
12kV ac - - 3 500nF Polypropylene Stud Mount MV APP 470mm 115mm 600mm -25°C - -
RS Stock No. 136-6312
Mfr. Part No.B25675A4302J040
BrandEPCOS
SGD274.23
Each
units
440V ac 30kvar - - 3 x 164.4µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 192-3560
Mfr. Part No.B25161S0010M000
BrandEPCOS
SGD1,371.933
Each (In a Box of 10)
units
36kV ac - - 1 100nF Polypropylene Stud Mount MV APP 250mm 120mm 760mm -25°C - -
RS Stock No. 136-4931
Mfr. Part No.B25675A5122J525
BrandEPCOS
SGD143.537
Each (In a Box of 9)
units
525V ac 12.5kvar 15kvar - 3 x 48.1µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 136-5120
Mfr. Part No.C9TS6MD5960AARX
BrandKEMET
SGD81.472
Each (In a Box of 12)
units
440V ac - - - 3 x 96µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-6323
Mfr. Part No.B25675A4152J015
BrandEPCOS
SGD195.29
Each
units
415V ac 15kvar 18kvar - 3 x 92.4µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 192-3579
Mfr. Part No.B32305A5252B025
BrandEPCOS
SGD246.445
Each (In a Box of 4)
units
525V ac - - 3 96µF Polypropylene Stud Mount MKD - 136 Dia.mm 230mm -40°C +65°C -5%
RS Stock No. 135-3622
Mfr. Part No.PhMKP525.3.25,00-A84
BrandVishay
SGD329.49
Each
units
525V dc - - - 3 x 96.2µF Polypropylene Screw Mount phMKP - - 265mm - +65°C -5%
RS Stock No. 136-5110
Mfr. Part No.C9TS5MD5920AARX
BrandKEMET
SGD95.604
Each (In a Box of 9)
units
415V ac - - - 3 x 92.2µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-4928
Mfr. Part No.B25675A4252J080
BrandEPCOS
SGD222.40
Each (In a Box of 4)
units
480V ac 25kvar 30kvar - 3 x 115.1µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 187-5374
Mfr. Part No.PhMKP525.3.25,00-S84
BrandVishay
SGD427.36
Each (In a Box of 4)
units
525V 25kvar - 3 3 x 96.2µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 192-3547
Mfr. Part No.B25161L0010M000
BrandEPCOS
SGD778.231
Each (In a Box of 10)
units
3.6kV ac - - 1 100nF Polypropylene Stud Mount MV APP 200mm 115mm 375mm -25°C - -
RS Stock No. 187-5383
Mfr. Part No.PhMKP440.3.25,00-S84
BrandVishay
SGD290.87
Each
units
440V 25kvar - 3 3 x 137µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%