ESR Values for 97F8000 Series – Curve Numbers refer to Graphs on Page 10.
Voltage
(VAC)
Catalog
Number
Capacitance
(µF)
ESR
(ohms)
Curve
Number
Voltage
(VAC)
Catalog
Number
Capacitance
(µF)
ESR
(ohms)
Curve
Number
97F8036 15.0 0.0257 2 97F8054 3.0 0.0700 1
97F8037 25.0 0.0180 2 97F8055 4.0 0.0539 1
97F8038 30.0 0.0228 3 97F8056 5.0 0.0586 2
97F8039 35.0 0.0206 3 97F8057 6.0 0.0499 2
97F8040 40.0 0.0190 3 97F8058 7.5 0.0411 2
97F8041 45.0 0.0241 4 97F8059 10.0 0.0471 3
97F8042 50.0 0.0226 4 97F8060 12.5 0.0392 3
97F8043 55.0 0.0213 4 97F8061 15.0 0.0244 2
97F8044 60.0 0.0215 5 97F8062 17.5 0.0218 2
97F8045 65.0 0.0206 5 97F8063 20.0 0.0281 3
97F8046 70.0 0.0198 5 97F8064 25.0 0.0240 3
97F8047 75.0 0.0191 5 97F8065 30.0 0.0213 3
97F8048 80.0 0.0164 5 97F8066 35.0 0.0262 4
97F8049 85.0 0.0160 5 97F8067 40.0 0.0240 4
97F8050 90.0 0.0156 5 97F8068 45.0 0.0235 5
97F8051 95.0 0.0193 6 97F8069 50.0 0.0222 5
97F8052 100.0 0.0189 6 97F8070 55.0 0.0210 5
97F8053 120.0 0.0176 6 97F8071 60.0 0.0175 5
97F8072 65.0 0.0169 5
97F8073 70.0 0.0207 6
370
240
The 97F8000 Series of capacitors may be used in AC applications where the voltage waveform is non-
sinusoidal. This Application Note is provided to assist in the correct use of the capacitors where higher
frequency harmonic currents are present. If you need further assistance please contact Capcom
Capacitors Operation through your normal sales channel.
Higher frequency currents are commonly encountered in the filter circuits of Static Power Converters.
These frequencies range from 180 to 1500 Hz for a 60 Hz system in various combinations of the odd
harmonics depending on the type of converter. Generally, there are not significant harmonic
currents above the 25th harmonic.
These capacitors can carry a total current of up to 15 amperes RMS (fundamental plus harmonics).
The Equivalent Series Resistance (ERS) for each Catalog Number is shown in the ESR tables on this
page. This value may be used to calculate the expected watts loss for a particular application. The
user must determine the total RMS current (fundamental plus harmonics) for the application. The
watts loss is then calculated using the equation:
W=I2 x ESR I = Total RMS current ESR = Value from ESR Tables
The calculated watts from this equation must not exceed the allowable watts loss shown on the
curve corresponding to the particular capacitor. Two sets of curves are shown, one for natural
circulation and one for forced air circulation.
(1) In no case should the total RMS current of 15 amperes be exceeded for any of these capacitors
(2) Running the capacitors at case temperatures above 70ºC will have a significant effect on expected life. (See
chart G-1 on page 11).
(3) Running the capacitors at voltages above the nominal rated voltage will also results in significantly reduced life.
(See chart G-2 on page 11).
Gen Purpose AC Capacitors – GEM III
Application Notes-97F8000 Series-240 & 370 VAC
www.capcom.mx 9