Q&A Corner : Answer

Does capacitance of ceramic capacitors change by temperature?
What are capacitance temperature characteristics in capacitors?

Capacitance of ceramic capacitors changes by ambient temperature. This change is called capacitance temperature characteristics.
This is caused by the material used in ceramic capacitors, and generally occurs on ceramic capacitors of other companies.

The following picture is showing capacitance change ratio of our product LMK212BJ105KD-T by temperature.

About temperature characteristics of ceramic capacitors, there are two standards widely used. One is Japanese Industrial Standards(JIS), and the other is the standard by Electronic Industries Alliance(EIA). Ceramic capacitor manufacturers including our company provide temperature characteristic symbol of both/either JIS and/or EIA to each product. From this information, You can know the operating temperature range and coefficient of capacitance within the operating temperature range or capacitance change ratio belonging to each product. The following table is showing representative JIS and EIA temperature characteristic symbol list, and the list is also showing corresponding operating temperature range, temperature coefficient and capacitance change ratio.

CLASS1(Temperature compensating type)
Symbol Operating temperature range
Temperature coefficient
CG C0G -55 to +125 0±30
CH C0H 0±60
CJ C0J 0±120
CK C0K 0±250
UJ U2J -750±120
UK U2K -750±250
SL - -1000 to +350
CLASS2(High dielectric type)
Symbol Operating temperature range
Capacitance change ratio
B - -25 to +85 ±10
- X5R -55 to +85 ±15
- X6S -55 to +105 ±22
- X7R -55 to +125 ±15
- X7S -55 to +125 ±22
- X7T -55 to +125 -22/+33
F - -25 to +85 +30/-80
- Y5V -30 to +85 +22/-82

* Reference temperature is 20℃ in JIS and 25℃ in EIA.

Temperature coefficient and capacitance change ratio can be calculated from capacitance CT at operating temperature T and capacitance CT0 at reference temperature T0 using following formulas. These values must be within the range shown in the above table.

Please refer to TY-COMPAS for each product where you can search specifications and characteristics of our products.