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

T2078_A720 • 3/17/2020

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.ThepositivepeakACvoltageplustheDCbiasvoltage,ifany,mustnotexceedtheDCvoltageratingofthecapacitor.

2.ThenegativepeakACvoltage,incombinationwithbiasvoltage,ifany,mustnotexceedtheallowablelimitsspecified

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

Powercapabilityisdeterminedbasedona20°Ctemperaturerise.Ahighertemperatureriseandthereforehigherpower

capabilityisallowableaslongastheambienttemperature,plus,temperatureriseduetoripplecurrent,doesnotexceedthe

rated temperature of the part.

Themaximumpowerdissipationbycasesizecanbedeterminedusingthebelowtable.

KEMET Series

and Case Code

EIA

Case Code

Maximum Power

Dissipation (Pmax)

mWatts at 25°C

with +20°C Rise

A720V

7343–21

410

UsingthePmaxofthedevice,themaximumallowableRMSripplecurrentorvoltagemaybedetermined.

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.