This is a 63V 10uF Electrolytic capacitor from Keltron. It has diameter of 6.3 mm and length of 11 mm. PARAMETERS. PERFORMANCE CHARACTERISTICS Operating Temperature - 400 C to +85 0C for WV ? 250 Vdc, -250C to + 850C for WV > 250 Vdc. Working Voltage 6.3 Vdc to 450 Vdc. (500 Wvdc on request) Capacitance Range 0.10 to 22000uF (at +270 C, 100 Hz) Capacitance Tolerance +-20%, (Other tolerance on request) Leakage Current (After 3mt charging through 1000 ? resistor) IL in uA IL ? 0.01 CV or 4 uA, whichever is greater for WV 6.3 to 100 V ? 0.02 CV+ 10uA for WV 160 to 500 V, Where IL = Leakage current in uA C= Capacitance( uF) , V= Working Voltage in Volt