Tantalum Through-Hole Capacitors – Hermetically Sealed
T550 Axial Polymer Hermetic Seal (PHS) 105ºC and DLA Series
Recommended Voltage Derating Guidelines
−55°C to 85°C
% Change in Working DC
Voltage with Temperature
Recommended Maximum
Application Voltage
(As % of Rated Voltage)
V
R
85°C to 105°C
78% of V
R
120%
100%
% Working Voltage
80%
60%
40%
20%
0%
% Change in Working DC Voltage
with Temperature
Recommended Maximum Application
Voltage (As % of Rated Voltage)
80%
78
%
63
%
80% of V
R
63% of V
R
−55
25
45
85
105
Temperature (°C)
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 that 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, if any, must not exceed the allowable limits specified
for reverse voltage.
The maximum power dissipation by case size can be determined using the below left table. The maximum power dissipation
rating stated in the table must be reduced with increasing environmental operating temperatures. Refer to the below right
table for temperature compensation requirements.
Maximum Power
Dissipation (P
max
)
mWatts at 25°C
with +60°C Rise
715
Case Code
KEMET
B
MIL–PRF–39006/22/
25/30/31 Case Size
T2
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)
The maximum power dissipation rating must be reduced with increasing
environmental operating temperatures. Refer to the Temperature
Compensation Multiplier table for details.
Temperature Compensation Multipliers for
Maximum Power Dissipation (P
max
)
T ≤ 45°C
1.00
45°C < T ≤ 85°C
0.70
85°C < T ≤ 105°C
0.10
T= Environmental Temperature
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 • 864-963-6300 • www.kemet.com
T2059_T550 • 1/12/2018
7
KEMET [ KEMET CORPORATION ]
