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. 136-6322
Mfr. Part No.B25675A4252J080
BrandEPCOS
MYR843.54
Each
units
480V ac 25kvar 30kvar - 3 x 115.1µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 135-3621
Mfr. Part No.HDMKP 2.0-390 I
BrandVishay
MYR2,110.26
Each
units
2kV dc - - - 390µF - Plug In HDMKP - - 235mm -40°C +80°C -
RS Stock No. 135-3625
Mfr. Part No.GLI 900-100 I
BrandVishay
MYR1,154.70
Each
units
900V dc - - - 100µF - Plug In GLI - - 56mm -40°C +80°C -
RS Stock No. 136-5137
Mfr. Part No.C9TS5MD6123AARX
BrandKEMET
MYR284.42
Each
units
415V ac - - - 3 x 123µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 187-5369
Mfr. Part No.PhMKP400.3.25,00-S84
BrandVishay
MYR1,668.64
Each (In a Box of 4)
units
400V ac 25kvar - 3 3 x 165.8µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 187-5375
Mfr. Part No.PhMKP660.3.22,90-S84
BrandVishay
MYR1,655.105
Each (In a Box of 4)
units
660V ac 22.9kvar - 3 3 x 55.8µF Polypropylene Stud Mount PhMKP - 88.2mm 340mm - +65°C -5%
RS Stock No. 135-3610
Mfr. Part No.GLI 900-150 A
BrandVishay
MYR664.463
Each (In a Box of 4)
units
900V dc - - - 150µF - Plug In GLI - - 68mm -40°C +80°C -
RS Stock No. 136-6312
Mfr. Part No.B25675A4302J040
BrandEPCOS
MYR945.58
Each
units
440V ac 30kvar - - 3 x 164.4µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 136-5138
Mfr. Part No.C9TS5MD6154AARX
BrandKEMET
MYR387.42
Each
units
415V ac - - - 3 x 154µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5127
Mfr. Part No.C9TS6MD6110AARX
BrandKEMET
MYR261.78
Each
units
440V ac - - - 3 x 110µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 192-3547
Mfr. Part No.B25161L0010M000
BrandEPCOS
MYR2,411.305
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. 192-3575
Mfr. Part No.B32305A4302B040
BrandEPCOS
MYR724.15
Each (In a Box of 4)
units
440V ac - - 3 165µF Polypropylene Stud Mount MKD - 136 Dia.mm 275mm -40°C +65°C -5%
RS Stock No. 136-6323
Mfr. Part No.B25675A4152J015
BrandEPCOS
MYR640.48
Each
units
415V ac 15kvar 18kvar - 3 x 92.4µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 136-5105
Mfr. Part No.C9TS5MD5311AARX
BrandKEMET
MYR237.957
Each (In a Box of 12)
units
415V ac - - - 3 x 31.1µF - Stud Mount C9T - - 160mm -25°C +55°C -
RS Stock No. 136-5135
Mfr. Part No.C9TS5MD5920AARX
BrandKEMET
MYR319.94
Each
units
415V ac - - - 3 x 92.2µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 192-3539
Mfr. Part No.B25161C0025M000
BrandEPCOS
MYR2,009.417
Each (In a Box of 10)
units
3.6kV ac - - 1 250nF Polypropylene Stud Mount MV APP 175mm 115mm 290mm -25°C - -
RS Stock No. 187-5372
Mfr. Part No.PhMKP525.3.12,50-S84
BrandVishay
MYR1,058.988
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. 135-3616
Mfr. Part No.PhMKP440.3.28,10-A84
BrandVishay
MYR1,234.32
Each
units
440V ac - - - 3 x 154µF - Screw Mount phMKP - - 265mm - +65°C -
RS Stock No. 135-3605
Mfr. Part No.HDMKP 1.1-420 I
BrandVishay
MYR890.32
Each (In a Box of 4)
units
1.1kV dc - - - 420µF - Plug In HDMKP - - - -40°C +80°C -
RS Stock No. 135-3627
Mfr. Part No.GLI 900-150 A
BrandVishay
MYR827.55
Each
units
900V dc - - - 150µF - Plug In GLI - - 68mm -40°C +80°C -