X7R Dielectric
General Specifications
X7R formulations are called “temperature stable” ceramics and fall into EIA Class II materials. X7R is the most
popular of these intermediate dielectric constant materials. Its temperature variation of capacitance is within
±15% from -55°C to +125°C. This capacitance change is non-linear.
Capacitance for X7R varies under the influence of electrical operating con-ditions such as voltage and frequency.
X7R dielectric chip usage covers the broad spectrum of industrial applications where known changes in
capacitance due to applied voltages are acceptable.
PART NUMBER (SEE PAGE 4 FOR COMPLETE PART NUMBER EXPLANATION)
0805
Size
(L” x W”)
5
Voltage
4V = 4
6.3V = 6
10V = Z
16V = Y
25V = 3
50V = 5
100V = 1
200V = 2
500V = 7
С
Dielectric
X7R = C
103
Capacitance
Code (In pF)
2 Sig. Digits +
Number of Zeros
M
Capacitance
Tolerance
J = ± 5%*
K = ±10%
M = ± 20%
*≤1μF only,
contact factory for
additional values
A
Failure
Rate
A = Not
Applicable
T
Terminations
T = Plated Ni and Sn
7 = Gold Plated
*
Z= FLEXITERM
®
**
*Optional termination
**See FLEXITERM
®
X7R section
2
Packaging
2 = 7” Reel
4 = 13” Reel
Contact
Factory For
Multiples
A
Special
Code
A = Std.
Product
NOTE:
Contact factory for availability of Termination and Tolerance Options for Specific Part Numbers.
Contact factory for non-specified capacitance values.
18
042718
X7R Dielectric
Specifications and Test Methods
Parameter/Test
Operating Temperature Range
Capacitance
Dissipation Factor
X7R Specification Limits
-55ºC to +125ºC
Within specified tolerance
≤ 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
Contact Factory for DF by PN
100,000MΩ or 1000MΩ - µF,
whichever is less
Measuring Conditions
Temperature Cycle Chamber
Freq.: 1.0 kHz ± 10%
Voltage: 1.0Vrms ± .2V
For Cap > 10µF, 05Vrm @ 120Hz
Charge device with rated voltage for
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)
Note: Charge device with 150% of rated voltage
for 500V devices.
Insulation Resistance
Dielectric Strength
No breakdown or visual defects
Resistance to
Flexure
Stresses
Appearance
Capacitance
Variation
Dissipation
Factor
Insulation
Resistance
No defects
≤ ±12%
Meets Initial Values (As Above)
≥ Initial Value x 0.3
≥ 95% of each terminal should be covered with
fresh solder
No defects, <25% leaching of either end terminal
≤ ±7.5%
Meets Initial Values (As Above)
Meets Initial Values (As Above)
Meets Initial Values (As Above)
No visual defects
≤ ±7.5%
Meets Initial Values (As Above)
Meets Initial Values (As Above)
Meets Initial Values (As Above)
No visual defects
≤ ±12.5%
≤ Initial Value x 2.0 (See Above)
≥ Initial Value x 0.3 (See Above)
Step 1: -55ºC ± 2º
Step 2: Room Temp
Step 3: +125ºC ± 2º
Step 4: Room Temp
30 ± 3 minutes
≤ 3 minutes
30 ± 3 minutes
≤ 3 minutes
Dip device in eutectic solder at 260ºC for 60
seconds. Store at room temperature for 24 ±
2hours before measuring electrical properties.
Dip device in eutectic solder at 230 ± 5ºC
for 5.0 ± 0.5 seconds
Deflection: 2mm
Test Time: 30 seconds
Solderability
Appearance
Capacitance
Variation
Dissipation
Factor
Insulation
Resistance
Dielectric
Strength
Appearance
Capacitance
Variation
Dissipation
Factor
Insulation
Resistance
Dielectric
Strength
Appearance
Capacitance
Variation
Dissipation
Factor
Insulation
Resistance
Dielectric
Strength
Appearance
Capacitance
Variation
Dissipation
Factor
Insulation
Resistance
Dielectric
Strength
Resistance to
Solder Heat
Thermal Shock
Repeat for 5 cycles and measure after 24 ± 2
hours at room temperature
Charge device with 1.5 rated voltage (≤ 10V) in
test chamber set at 125ºC ± 2ºC for 1000 hours
(+48, -0)
If RV > 10V then Life Test voltage will be 2xRV
but there are exceptions (please contact AVX for
further details on exceptions)
Remove from test chamber and stabilize at room
temperature for 24 ± 2 hours before measuring.
Load Life
Meets Initial Values (As Above)
No visual defects
≤ ±12.5%
≤ Initial Value x 2.0 (See Above)
≥ Initial Value x 0.3 (See Above)
Meets Initial Values (As Above)
Load
Humidity
Store in a test chamber set at 85ºC ± 2ºC/ 85% ±
5% relative humidity for 1000 hours (+48, -0) with
rated voltage applied.
Remove from chamber and stabilize at room
temperature and humidity for 24 ± 2 hours before
measuring.
19
051319
Embedded System
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