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 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
Size
(L" x W")
Voltage
4V = 4
6.3V = 6
10V = Z
16V = Y
25V = 3
50V = 5
100V = 1
200V = 2
500V = 7
Dielectric
X7R = C
Capacitance
Code (In pF)
2 Sig. Digits +
Number of Zeros
Capacitance
Tolerance
J = ± 5%*
K = ±10%
M = ± 20%
Failure
Rate
A = Not
Applicable
A
Terminations
T = Plated Ni
and Sn
7 = Gold Plated*
Z= FLEXITERM®**
Packaging
2 = 7" Reel
4 = 13" Reel
7 = Bulk Cass.
9 = Bulk
Special
Code
A = Std.
Product
*Optional termination
*≤1μF only,
contact factory for
additional values
2
Contact
Factory For
Multiples
**See FLEXITERM®
X7R section
X7R Dielectric�
Typical Temperature Coefficient
⌬ Capacitance vs. Frequency
+30
10
+20
% ⌬ Capacitance
0
-5
-10
-15
-20
0
20
40
60
0
-10
-20
-30
1KHz
-25
-60 -40 -20
+10
80 100 120 140
Temperature °C
10 KHz
100 KHz
1,000 pF
1210
Impedance, ⍀
Impedance, ⍀
1.00
0.10
Frequency, MHz
100
0
0
20
40
1000
1.0
0.1
1
10
80
100
120
Variation of Impedance with Chip Size�
Impedance vs. Frequency�
100,000 pF - X7R�
10
�
�
1206
0805
1210
1.0
0.1
.01
.01
60
Temperature °C
Variation of Impedance with Chip Size�
Impedance vs. Frequency�
10,000 pF - X7R�
�
10
1206
�
0805
10,000 pF
100
10 MHz
1,000
Frequency
Variation of Impedance with Cap Value�
Impedance vs. Frequency�
1,000 pF vs. 10,000 pF - X7R�
0805�
�
10.00
0.01
10
1 MHz
Insulation Resistance vs Temperature
10,000
Impedance, ⍀
% Cap Change
5
Insulation Resistance (Ohm-Farads)
NOTE: Contact factory for availability of Termination and Tolerance Options for Specific Part Numbers.
Contact factory for non-specified capacitance values.
100
Frequency, MHz
1,000
1
10
100
1,000
Frequency, MHz
17
