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© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard

T2078_A720 • 7/26/2022

Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com

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Aluminum Organic Capacitor (AO-CAP)

A720 Polymer Aluminum

Derating Guidelines

Voltage Rating

Maximum

Recommended

Steady State

Voltage

Maximum

Recommended

Transient Voltage

−55°Cto105°C

2 – 35 V

V

R

V

R

V

Ripple Current/Ripple Voltage

Permissible AC ripple voltage and current are related to equivalent series resistance (ESR) and the power dissipation

capabilities of the device. Permissible AC ripple voltage, which may be applied, is limited by two criteria:

1. The positive peak AC voltage plus the DC bias voltage, if any, must not exceed the DC voltage rating of the capacitor.

2.ThenegativepeakACvoltage,incombinationwithbiasvoltage,ifany,mustnotexceedtheallowablelimitsspecified

for reverse voltage. See the Reverse Voltage section for allowable limits.

Powercapabilityisdeterminedbasedona20°Ctemperaturerise.Ahighertemperatureriseandthereforehigherpower

capability is allowable as long as the ambient temperature, plus, temperature rise due to ripple current, does not exceed the

rated temperature of the part.

The maximum power dissipation by case size can be determined using the below table.

KEMET Series

and Case Code

EIA

Case Code

Maximum Power

Dissipation (Pmax)

mWatts at 25°C

with +20°C Rise

A720V

7343–21

410

Using the Pmax of the device, the maximum allowable RMS ripple current or voltage may be determined.

I(max) = √Pmax/R

E(max) = Z √Pmax/R

I = RMS ripple current (amperes)

E = RMS ripple voltage (volts)

Pmax = Maximum power dissipation(watts)

R = ESR at specified frequency (ohms)

Z = Impedance at specified frequency (Ohms)

Refer to part number listings for permittable Arms limits.