X7R Dielectric
Specifications and Test Methods
Parameter/Test
Operating Temperature Range
Capacitance
X7R Specification Limits
Measuring Conditions
-55ºC to +125ºC
Temperature Cycle Chamber
Within specified tolerance
Freq.: 1.0 kHz ± 10%
Voltage: 1.0Vrms ± .2V
≤ 10% for ≥ 50V DC rating≤ 12.5% for 25V DC rating
≤ 12.5% for 25V and 16V DC rating
≤ 12.5% for ≤ 10V DC rating
Dissipation Factor
For Cap > 10µF, 05Vrm @ 120Hz
100,000MΩ or 1000MΩ - µF,
Charge device with rated voltage for
Insulation Resistance
Dielectric Strength
whichever is less
120 ± 5 secs @ room temp/humidity
Charge device with 250% of rated voltage for
1-5 seconds, w/charge and discharge current
limited to 50 mA (max)
No breakdown or visual defects
Note: Charge device with 150% of rated
voltage for 500V devices.
Appearance
Capacitance
No defects
Deflection: 2mm
Test Time: 30 seconds
≤ ±12%
Resistance to
Flexure
Variation
Dissipation
Factor
Meets Initial Values (As Above)
Stresses
Insulation
≥ Initial Value x 0.3
Resistance
≥ 95% of each terminal should be covered
Dip device in eutectic solder at 230 ± 5ºC
for 5.0 ± 0.5 seconds
Solderability
with fresh solder
Appearance
No defects, <25% leaching of either end terminal
≤ ±7.5%
Capacitance
Variation
Dip device in eutectic solder at 260ºC for 60seconds.
Store at room temperature for 24 ± 2hours before
measuring electrical properties.
Dissipation
Factor
Resistance to
Solder Heat
Meets Initial Values (As Above)
Meets Initial Values (As Above)
Meets Initial Values (As Above)
Insulation
Resistance
Dielectric
Strength
Appearance
No visual defects
Step 1: -55ºC ± 2º
30 ± 3 minutes
Capacitance
Variation
≤ ±7.5%
Step 2: Room Temp
≤ 3 minutes
Dissipation
Factor
Thermal
Shock
Meets Initial Values (As Above)
Meets Initial Values (As Above)
Meets Initial Values (As Above)
Step 3: +125ºC ± 2º
Step 4: Room Temp
30 ± 3 minutes
Insulation
≤ 3 minutes
Resistance
Dielectric
Strength
Repeat for 5 cycles and measure after
24 ± 2 hours at room temperature
Appearance
No visual defects
Charge device with 1.5 rated voltage (≤ 10V) in
test chamber set at 125ºC ± 2ºC for 1000 hours
(+48, -0)
Capacitance
Variation
≤ ±12.5%
Dissipation
Factor
≤ Initial Value x 2.0 (See Above)
≥ Initial Value x 0.3 (See Above)
If RV > 10V then Life Test voltage will be 2xRV
but there are exceptions (please contact AVX for
Load Life
Insulation
further details on exceptions)
Resistance
Remove from test chamber and stabilize at room
temperature for 24 ± 2 hours before measuring.
Dielectric
Strength
Meets Initial Values (As Above)
Appearance
No visual defects
Store in a test chamber set at 85ºC ± 2ºC/
85% ± 5% relative humidity for 1000 hours
(+48, -0) with rated voltage applied.
Capacitance
Variation
≤ ±12.5%
Load
Dissipation
Factor
≤ Initial Value x 2.0 (See Above)
≥ Initial Value x 0.3 (See Above)
Meets Initial Values (As Above)
Humidity
Remove from chamber and stabilize at room
Insulation
temperature and humidity for
24 ± 2 hours before measuring.
Resistance
Dielectric
Strength
20
042718