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. 136-6314
Mfr. Part No.B25669A5467J375
BrandEPCOS
MYR1,151.77
Each
units
525V ac 40kvar 48kvar - 3 x 154µF - Stud Mount MKK - - 355mm -40°C +55°C -5%
RS Stock No. 136-5122
Mfr. Part No.C9TS6MD6137AARX
BrandKEMET
MYR344.893
Each (In a Box of 9)
units
440V ac - - - 3 x 137µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 192-3573
Mfr. Part No.B32305A4282B080
BrandEPCOS
MYR876.763
Each (In a Box of 4)
units
480V ac - - 3 129µF Polypropylene Stud Mount MKD - 136 Dia.mm 230mm -40°C +65°C -5%
RS Stock No. 192-3570
Mfr. Part No.B32305A4252B040
BrandEPCOS
MYR671.42
Each (In a Box of 4)
units
440V ac - - 3 137µF Polypropylene Stud Mount MKD - 136 Dia.mm 245mm -40°C +65°C -5%
RS Stock No. 192-3540
Mfr. Part No.B25161C0025O000
BrandEPCOS
MYR4,525.08
Each (In a Box of 10)
units
3.6kV ac - - 3 250nF Polypropylene Stud Mount MV APP 343mm 115mm 365mm -25°C - -
RS Stock No. 136-6307
Mfr. Part No.B25675A4122J500
BrandEPCOS
MYR754.33
Each
units
400V ac 12.5kvar 15kvar - 3 x 82.9µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
New
RS Stock No. 211-2821
Mfr. Part No.VLVAW0N03504AA
MYR15,080.35
Each
units
400V ac 32kvar - 3 - - - - - - - - - -
RS Stock No. 136-6304
Mfr. Part No.B25675A4052J000
BrandEPCOS
MYR479.31
Each
units
400V ac 5kvar 6kvar - 3 x 33.2µF - Stud Mount MKK - - 164mm -40°C +60°C -5%
RS Stock No. 187-5381
Mfr. Part No.PhMKP400.3.25,00-S84
BrandVishay
MYR1,116.11
Each
units
400V ac 25kvar - 3 3 x 165.8µF Polypropylene Stud Mount PhMKP - 88.2mm 265mm - +65°C -5%
RS Stock No. 136-6305
Mfr. Part No.B25675A5122J525
BrandEPCOS
MYR580.30
Each
units
525V ac 12.5kvar 15kvar - 3 x 48.1µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
RS Stock No. 136-5124
Mfr. Part No.C9TS6MD5685AARX
BrandKEMET
MYR277.38
Each
units
440V ac - - - 3 x 68.5µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-6322
Mfr. Part No.B25675A4252J080
BrandEPCOS
MYR898.96
Each
units
480V ac 25kvar 30kvar - 3 x 115.1µF - Stud Mount MKK - - 192mm -40°C +60°C -5%
RS Stock No. 136-6319
Mfr. Part No.B25675A4052J015
BrandEPCOS
MYR490.44
Each
units
415V ac 5kvar 6kvar - 3 x 30.8µF - Stud Mount MKK - - 164mm -40°C +60°C -5%
RS Stock No. 136-5127
Mfr. Part No.C9TS6MD6110AARX
BrandKEMET
MYR312.89
Each
units
440V ac - - - 3 x 110µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 192-3551
Mfr. Part No.B25161L0025M000
BrandEPCOS
MYR5,003.028
Each (In a Box of 10)
units
12kV ac - - 1 250nF Polypropylene Stud Mount MV APP 250mm 115mm 425mm -25°C - -
RS Stock No. 136-6323
Mfr. Part No.B25675A4152J015
BrandEPCOS
MYR717.80
Each
units
415V ac 15kvar 18kvar - 3 x 92.4µF - Stud Mount MKK - - 200mm -40°C +60°C -5%
New
RS Stock No. 211-2805
Mfr. Part No.VLVAF5N03520AA
MYR100,349.65
Each
units
400V ac 500kvar - 3 - - - - - - - - - -
RS Stock No. 192-3548
Mfr. Part No.B25161L0010O001
BrandEPCOS
MYR4,721.822
Each (In a Box of 10)
units
12kV ac - - 3 100nF Polypropylene Stud Mount MV APP 470mm 115mm 400mm -25°C - -
RS Stock No. 136-4931
Mfr. Part No.B25675A5122J525
BrandEPCOS
MYR527.517
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. 136-5111
Mfr. Part No.C9TS5MD6108AARX
BrandKEMET
MYR278.177
Each (In a Box of 12)
units
415V ac - - - 3 x 108µF - Stud Mount C9T - - 280mm -25°C +55°C -5%