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. 136-5111
Mfr. Part No.C9TS5MD6108AARX
BrandKEMET
SGD81.472
Each (In a Box of 12)
units
415V ac - - - 3 x 108µF - Stud Mount C9T - - 280mm -25°C +55°C -5%
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. 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. 136-5121
Mfr. Part No.C9TS6MD6110AARX
BrandKEMET
SGD85.915
Each (In a Box of 12)
units
440V ac - - - 3 x 110µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5115
Mfr. Part No.C9TS6MD5274AARX
BrandKEMET
SGD60.035
Each (In a Box of 12)
units
440V ac - - - 3 x 27.4µF - Stud Mount C9T - - 160mm -25°C +55°C -5%
RS Stock No. 136-5126
Mfr. Part No.C9TS6MD5960AARX
BrandKEMET
SGD86.90
Each
units
440V ac - - - 3 x 96µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5129
Mfr. Part No.C9TS6MD6137AARX
BrandKEMET
SGD104.28
Each
units
440V ac - - - 3 x 137µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5138
Mfr. Part No.C9TS5MD6154AARX
BrandKEMET
SGD104.44
Each
units
415V ac - - - 3 x 154µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5118
Mfr. Part No.C9TS6MD5685AARX
BrandKEMET
SGD77.704
Each (In a Box of 12)
units
440V ac - - - 3 x 68.5µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-5137
Mfr. Part No.C9TS5MD6123AARX
BrandKEMET
SGD91.80
Each
units
415V ac - - - 3 x 123µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5113
Mfr. Part No.C9TS5MD6123AARX
BrandKEMET
SGD98.074
Each (In a Box of 12)
units
415V ac - - - 3 x 123µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5114
Mfr. Part No.C9TS5MD6154AARX
BrandKEMET
SGD102.488
Each (In a Box of 9)
units
415V ac - - - 3 x 154µF - Stud Mount C9T - - 280mm -25°C +55°C -
RS Stock No. 136-5110
Mfr. Part No.C9TS5MD5920AARX
BrandKEMET
SGD87.416
Each (In a Box of 9)
units
415V ac - - - 3 x 92.2µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-5135
Mfr. Part No.C9TS5MD5920AARX
BrandKEMET
SGD93.30
Each
units
415V ac - - - 3 x 92.2µF - Stud Mount C9T - - 230mm -25°C +55°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. 136-5130
Mfr. Part No.C9TS5MD5311AARX
BrandKEMET
SGD58.55
Each
units
415V ac - - - 3 x 31.1µF - Stud Mount C9T - - 160mm -25°C +55°C -
RS Stock No. 136-5105
Mfr. Part No.C9TS5MD5311AARX
BrandKEMET
SGD59.541
Each (In a Box of 12)
units
415V ac - - - 3 x 31.1µF - Stud Mount C9T - - 160mm -25°C +55°C -
RS Stock No. 136-5139
Mfr. Part No.C9TS6MD5274AARX
BrandKEMET
SGD58.47
Each
units
440V ac - - - 3 x 27.4µF - Stud Mount C9T - - 160mm -25°C +55°C -5%
RS Stock No. 136-5125
Mfr. Part No.C9TS6MD5830AARX
BrandKEMET
SGD85.72
Each
units
440V ac - - - 3 x 83µF - Stud Mount C9T - - 230mm -25°C +55°C -
RS Stock No. 136-5122
Mfr. Part No.C9TS6MD6137AARX
BrandKEMET
SGD104.28
Each (In a Box of 9)
units
440V ac - - - 3 x 137µF - Stud Mount C9T - - 280mm -25°C +55°C -