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. 136-5126
Mfr. Part No.C9TS6MD5960AARX
BrandKEMET
SGD95.73
Each
units
440V ac - - - 3 x 96µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5110
Mfr. Part No.C9TS5MD5920AARX
BrandKEMET
SGD97.482
Each (In a Box of 9)
units
415V ac - - - 3 x 92.2µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-5124
Mfr. Part No.C9TS6MD5685AARX
BrandKEMET
SGD90.14
Each
units
440V ac - - - 3 x 68.5µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-6320
Mfr. Part No.B25675A4152J080
BrandEPCOS
SGD169.85
Each
units
480V ac 15kvar 18kvar - 3 x 69.1µF - Stud Mount MKK - - 207mm -40°C +60°C -5%
RS Stock No. 192-3541
Mfr. Part No.B25161C0050M000
BrandEPCOS
SGD644.476
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. 187-5385
Mfr. Part No.PhMKP440.3.28,10-S84
BrandVishay
SGD311.24
Each
units
440V ac 28.1kvar - 3 3 x 154µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 136-4919
Mfr. Part No.B25675A4252J015
BrandEPCOS
SGD195.49
Each (In a Box of 4)
units
415V ac 25kvar 30kvar - 3 x 154µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 135-3596
Mfr. Part No.PhMKP400.3.20,00-A84
BrandVishay
SGD148.005
Each (In a Box of 4)
units
400V ac - - - 3 x 132.6µF - Screw Mount phMKP - - 265mm - +65°C -
RS Stock No. 187-5391
Mfr. Part No.PhMKP525.3.25,00-S84
BrandVishay
SGD307.25
Each
units
525V ac 25kvar - 3 3 x 96.2µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 135-3608
Mfr. Part No.GLI 700-230 B
BrandVishay
SGD445.218
Each (In a Box of 4)
units
700V dc - - - 230µF - Plug In GLI - - 68mm -40°C +80°C -
RS Stock No. 192-3546
Mfr. Part No.B25161G0050O000
BrandEPCOS
SGD1,746.076
Each (In a Box of 10)
units
7.2kV ac - - 3 500nF Polypropylene Stud Mount MV APP 390mm 115mm 490mm -25°C - -
RS Stock No. 135-3623
Mfr. Part No.GLI 700-230 B
BrandVishay
SGD480.30
Each
units
700V dc - - - 230µF - Plug In GLI - - 68mm -40°C +80°C -
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. 135-3622
Mfr. Part No.PhMKP525.3.25,00-A84
BrandVishay
SGD335.96
Each
units
525V ac - - - 3 x 96.2µF Polypropylene Screw Mount phMKP - - 265mm - +65°C -5%
RS Stock No. 187-5367
Mfr. Part No.PhMKP400.3.12,50-S64
BrandVishay
SGD302.78
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. 187-5373
Mfr. Part No.PhMKP525.3.20,00-S84
BrandVishay
SGD223.788
Each (In a Box of 4)
units
525V ac 20kvar - 3 3 x 77µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 136-5122
Mfr. Part No.C9TS6MD6137AARX
BrandKEMET
SGD112.864
Each (In a Box of 9)
units
440V ac - - - 3 x 137µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5136
Mfr. Part No.C9TS5MD6108AARX
BrandKEMET
SGD86.90
Each
units
415V ac - - - 3 x 108µF - Stud Mount C9T - - 280mm -25°C +55°C -5%
RS Stock No. 187-5372
Mfr. Part No.PhMKP525.3.12,50-S84
BrandVishay
SGD313.15
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. 192-3577
Mfr. Part No.B32305A4332B080
BrandEPCOS
SGD335.905
Each (In a Box of 4)
units
480V ac - - 3 152µF Polypropylene Stud Mount MKD - 136 Dia.mm 230mm -40°C +65°C -5%