T3507109U is a circular DIN connector from Amphenol's signalmate® C091 (M16 Size) family of industrial connectors and cable assemblies. The connector is part of a modular series available in multiple configurations (M16 A, M16 B, M16 D, M16 D+, and M16 Q variants) with various coupling options including threaded, bayonet, and quicklock mechanisms. Key technical characteristics include operating temperature range of -40°C to +100°C, operating voltage up to 300V per IEC 60664-1 standard, and environmental protection ratings ranging from IP40 to IP69K when mated, with excellent EMI shielding capability for power and signal integrity. The connector supports multiple position configurations (2 through 19 positions depending on series), current ratings from 3A to 10A depending on position count, and features contact options including machined, stamped & formed, and solder/PC tail terminations with silver or gold plating. Applications include measuring instruments, equipment, 4G/5G mobile radio networks, and other industrial environments requiring reliable environmental protection and signal integrity.