17

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 -55°C to +125°C. 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)

10

-60 -40 -20

0

20

40

60

80 100 120 140

Temperature

°C

X7R Dielectric�

Typical Temperature Coefficient

5

0

-5

-10

-15

-20

-25

+10

+20

+30

0

-10

-20

-30

1KHz

10 KHz

100 KHz

1 MHz

10 MHz

Frequency

Capacitance vs. Frequency

1,000

10,000

100

0

0

20

120

40

60

80

Temperature

°C

Insulation Resistance vs Temperature

100

10

100

1000

Frequency, MHz

Variation of Impedance with Cap Value�

Impedance vs. Frequency�

1,000 pF vs. 10,000 pF - X7R�

0805�

�

0.10

0.01

1.00

1,000 pF

10,000 pF

10.00

110

100

1,000

Frequency, MHz

Variation of Impedance with Chip Size�

Impedance vs. Frequency�

100,000 pF - X7R�

�

�

0.1

.01

1.0

1206

0805

10

1210

110

100

1,000

Frequency, MHz

Variation of Impedance with Chip Size�

Impedance vs. Frequency�

10,000 pF - X7R�

�

�

0.1

.01

1.0

1206

0805

10

1210

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

C

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

2

Packaging

2 = 7" Reel

4 = 13" Reel

7 = Bulk Cass.

9 = Bulk

Contact

Factory For

Multiples

A

Special

Code

A = Std.

Product

T

Terminations

T = Plated Ni

and Sn

7 = Gold Plated*

A

Failure

Rate

A = Not

Applicable

*Optional termination

X7R section

NOTE: Contact factory for availability of Termination and Tolerance Options for Specific Part Numbers.

Contact factory for non-specified capacitance values.