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