The 121073-4074-D is a Standard D-Subminiature connector featuring 50 contacts in size 20 configuration with pin gender and turned copper alloy contacts finished with gold flash (Performance Class 3). This connector supports wire gauges from AWG 20-28 and delivers a current rating of 7.5 A at 85°C or 5 A at 105°C, with a dielectric withstanding voltage of 1200 VAC at sea level and contact resistance of 10 milli Ohm maximum. The connector operates reliably across a temperature range of -55°C to +125°C, features a steel shell with tin finish, and a thermoplastic insulator (PCT UL 94V-0) in black, with right-angled solder termination and metal bracket mounting with 4-40 captive nut. This robust design is ideal for industrial control systems, telecommunications equipment, and data transmission applications requiring durable, high-density interconnections with proven reliability over 50 mating cycles.