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 varia-
tion of capacitance is within 15% from -55C to +125C. This
capacitance change is non-linear.
Capacitance for X7R varies under the influence of electrical op-
erating conditions 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 2 for complete part number explanation)
0805 5 C 103 M A T 2 A
Size Voltage Dielectric Capacitance Capacitance Failure Terminations Packaging Special
( x ) 4V = 4 X7R = C Code (In pF) Tolerance Rate 2 = 7" Reel Code
T = Plated Ni
6.3V = 6 J = 5%* A = Not 4 = 13" Reel A = Std.
2 Sig. Digits +
and Sn
10V = Z K = 10% Applicable Product
7 = Bulk Cass.
Number of Zeros
7 = Gold Plated*
16V = Y M = 20%
9 = Bulk
Z= FLEXITERM **
25V = 3
50V = 5 *1F only,
Contact
100V = 1 contact factory for
*Optional termination
Factory For
200V = 2 additional values
500V = 7 Multiples
**See FLEXITERM
X7R section
NOTE: Contact factory for availability of Termination and Tolerance Options for Specific Part Numbers.
Contact factory for non-specified capacitance values.
X7R Dielectric
Insulation Resistance vs Temperature
Capacitance vs. Frequency
Typical Temperature Coefficient
10,000
+30
10
5 +20
0 1,000
+10
-5
0
-10
-10 100
-15
-20
-20
-25 -30
0
-60 -40 -20 0 20 40 60 80 100 120 140 1KHz 10 KHz 100 KHz 1 MHz 10 MHz 0 20 40 60 80 100 120
Frequency Temperature C
Temperature C
Variation of Impedance with Cap Value
Variation of Impedance with Chip Size
Impedance vs. Frequency Variation of Impedance with Chip Size
Impedance vs. Frequency
Impedance vs. Frequency
1,000 pF vs. 10,000 pF - X7R
100,000 pF - X7R
0805 10,000 pF - X7R
10
10.00 10
1206
1206
1,000 pF
0805
0805
10,000 pF 1210
1210
1.0
1.00 1.0
0.1
0.10
0.1
.01
0.01 .01
110 100 1,000
10 100 1000 110 100 1,000
Frequency, MHz
Frequency, MHz Frequency, MHz
17
Impedance,
% Cap Change
% Capacitance
Impedance,
Insulation Resistance (Ohm-Farads)
Impedance, X7R Dielectric
Specifications and Test Methods
Parameter/Test X7R Specification Limits Measuring Conditions
Operating Temperature Range -55C to +125C Temperature Cycle Chamber
Capacitance Within specified tolerance
2.5% for 50V DC rating Freq.: 1.0 kHz 10%
3.0% for 25V DC rating Voltage: 1.0Vrms .2V
Dissipation Factor
3.5% for 25V and 16V DC rating
5.0% for 10V DC rating
100,000M or 1000M - F, Charge device with rated voltage for
Insulation Resistance
whichever is less 120 5 secs @ room temp/humidity
Charge device with 300% of rated voltage for
Dielectric Strength No breakdown or visual defects 1-5 seconds, w/charge and discharge current
limited to 50 mA (max)
Note: Charge device with 150% of rated
voltage for 500V devices.
Appearance No defects Deflection: 2mm
Capacitance Test Time: 30 seconds
12%
Resistance to Variation
1mm/sec
Flexure Dissipation
Meets Initial Values (As Above)
Stresses Factor
Insulation
Initial Value x 0.3
90 mm
Resistance
95% of each terminal should be covered Dip device in eutectic solder at 230 5C
Solderability
with fresh solder for 5.0 0.5 seconds
Appearance No defects, <25% leaching of either end terminal
Capacitance
7.5%
Variation
Dip device in eutectic solder at 260C for 60
Dissipation
Resistance to seconds. Store at room temperature for 24 2
Meets Initial Values (As Above)
Factor
Solder Heat hours before measuring electrical properties.
Insulation
Meets Initial Values (As Above)
Resistance
Dielectric
Meets Initial Values (As Above)
Strength
Appearance No visual defects Step 1: -55C 2 30 3 minutes
Capacitance
7.5% Step 2: Room Temp 3 minutes
Variation
Dissipation
Thermal Meets Initial Values (As Above) Step 3: +125C 2 30 3 minutes
Factor
Shock
Insulation
Meets Initial Values (As Above) Step 4: Room Temp 3 minutes
Resistance
Dielectric Repeat for 5 cycles and measure after
Meets Initial Values (As Above)
Strength 24 2 hours at room temperature
Appearance No visual defects
Capacitance Charge device with 1.5 rated voltage ( 10V) in
12.5%
Variation test chamber set at 125C 2C
Dissipation for 1000 hours (+48, -0)
Initial Value x 2.0 (See Above)
Load Life Factor
Insulation Remove from test chamber and stabilize
Initial Value x 0.3 (See Above)
Resistance at room temperature for 24 2 hours
Dielectric before measuring.
Meets Initial Values (As Above)
Strength
Appearance No visual defects
Store in a test chamber set at 85C 2C/
Capacitance
12.5%
85% 5% relative humidity for 1000 hours
Variation
(+48, -0) with rated voltage applied.
Load Dissipation
Initial Value x 2.0 (See Above)
Humidity Factor
Remove from chamber and stabilize at
Insulation
Initial Value x 0.3 (See Above)
room temperature and humidity for
Resistance
24 2 hours before measuring.
Dielectric
Meets Initial Values (As Above)
Strength
18