TCC Temperature Coefficient of Capacitance For common ceramic capacitor dielectrics
Low Limit - DegC		High Limit - DegC		Maximum Allowable Capacitance Change From +25°C (@ 0 VDC) %
X	-55	2	+45	A	+/- 1
Y	-30	4	+65	B	+/- 1.5
Z	+10	5	+85	C	+/- 2.2
		6	+105	D	+/- 3.3
		7	+125	E	+/- 4.7
		8	+150	F	+/- 7.5
				L	+/-15 (-55-125C) +15/-40 (125-150C)
				P	+/- 10
				R	+/- 15
				S	+/- 20
				T	+22 / -33
				U	+22 / -56
				V	+22 / -82
X7R example:  This capacitor has an operating temperature from -55 to +125 DegC and a change in capacitance of no more than +/- 15% from its initial value over that operating range.  Note that Tolerance is a percentage variation from the initial value indicated on the box, typically specified at 25C.  The tempco is then a change from this actual starting point as the temperature changes.