3.5mm SMD phone jack with internal switches
The SJ-43516-SMT-TR is a 4-conductor, 6-contact phone jack from CUI Devices' SJ series, accepting a standard 3.50mm (1/8") mini plug. Rated 1 A at 12 VDC with silver-plated contacts and two internal switches for detecting plug insertion or routing signals.
Switch count vs contact count in the SJ series
Within the SJ-43 base series, the SJ-43516-SMT-TR carries 6 contacts with two internal switches, while the SJ-43514-SMT-TR carries 4 contacts without switches — the mating diameter, current rating, and board footprint are shared across both parts.