The onsemi CNY173M_F132 is officially marked as Obsolete in the manufacturer's lifecycle status.
Isolation and signal transfer parametrics
Rated for 4170Vrms isolation — this is a reinforced-grade barrier for galvanic separation between a DC input circuit and a transistor output stage in a 6-DIP through-hole package. Current transfer ratio spans 100% to 200% at 10 mA forward current, giving a predictable gain window for the receiving logic or PLC input across the isolation gap. Output transistor can handle up to 70 V and 50 mA continuous, with a Vce saturation ceiling of 400 mV — suitable for driving a 5 V or 24 V logic input directly without a secondary buffer.
Temperature grade and environment
Typical turn-on time of 2 µs and turn-off time of 3 µs, with rise/fall of 4 µs and 3.5 µs max — fast enough for 100 kHz switching signals or digital fault detection loops.