Value 300 to 650 420 Bialkali 111 Borosilicate glass K free Borosilicate glass Box and Grid 10 6 7 14 pin base JEDEC No. B14 38 E678 14A(option) Unit nm nm mm dia. pF pF MAXIMUM RATINGS (Absolute Maximum Values) Supply Voltage Avarage Anode Current Ambient Temperature Parameter Between Anode and C.