The DDL4 is a double signal diode that dates from 1937. The diodes are indirectly heated and share a common cathode.

The balloon envelope is 29 mm in diameter and, excluding the B5 base pins, is 74 mm tall.

 
Pin Connections

B5	1	2	3	4	5
	a(1)	a(2)	h	h	k

 
Absolute Maximum Operating Conditions

Diode	Vh	Ah	Va	mAa
	4.0	0.75	20	10.0

This exhibit was last updated on 02 December 2007