Board-Edge D-Sub for Enclosed Equipment
The TE Connectivity 747842-4 is a 25-position D-sub plug from the AMPLIMITE HD-20 series, configured as a right-angle through-hole mount for board-edge applications. The shell is steel with tin plating, sized to the DB-25 (3/B) layout, and the housing meets UL94 V-0 flammability rating for use inside enclosures.
Board Locks and Grounding Features
The 747842-4 includes board locks, a ground strap, and grounding indents — features that distinguish it from a basic D-sub. The flange uses 4-40 threaded inserts for mating with the receptacle.
Termination is solder — the pins are through-hole for wave or hand soldering. The backset spacing of 0.318" (8.08mm) sets the distance from the PCB to the mating face; confirm this dimension against your enclosure clearance before layout.