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T2016_T521 • 12/11/2015

88

T521 High Voltage Polymer Electrolytic, 12.5 – 75 VDC

50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

100%

-55

25

45

85

105

125

Temperature (°C)

Maximum Transient Voltage

Recommended Application Voltage

Derating Guidelines

Voltage

Rating

Maximum

Recommended Steady

State Voltage

Maximum Recommended

Transient Voltage

(1 ms – 1 µs)

-55°C to 105°C

12.5V≤V

80% of V

R

V

R

105°C to 125°C

12.5V≤V

54% of V

R

67% of 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. The negative peak AC voltage in combination with bias

voltage,ifany,mustnotexceedtheallowablelimitsspecifiedfor

reverse voltage. See the Reverse Voltage section for allowable

limits.

The maximum power dissipation by case size can be determined

using the table at right. The maximum power dissipation rating

stated in the table must be reduced with increasing environmental

operating temperatures. Refer to the table below for temperature

compensation requirements.

Temperature Compensation Multipliers

for Maximum Ripple Current

T≤45°C

45°C<T≤85°C

85°C<T≤125°C

1.00

0.70

0.25

T= Environmental Temperature

Using the P max of the device, the maximum allowable rms ripple

current or voltage may be determined.

I(max) = √P max/R

E(max) = Z √P max/R

I = rms ripple current (amperes)

E = rms ripple voltage (volts)

P max = maximum power dissipation (watts)

R = ESR at specified frequency (ohms)

Z = Impedance at specified frequency (ohms)

Case Code

EIA

Case Code

Maximum Power

Dissipation (P max)

mWatts at 45°C

with +30°C Rise

T

3528-12

105

B

3528-21

127

W

7343-15

180

V

7343-20

187

D

7343-31

225

Q

7343-12

170

X

7343-43

247

The maximum power dissipation rating must be reduced with increasing

environmental operating temperatures. Refer to the Temperature Compensation

Multiplier table for details.