8200 Vrms isolation in a 4-DIP through-hole package
It comes in a 4-EDIP (0.300", 7.62 mm) through-hole package, designated as 4-DIP for the supplier device package. The DC input drives an infrared LED (typical forward voltage 1.25 V, max forward current 75 mA), and the transistor output can switch up to 32 V at 50 mA per channel. With a current transfer ratio (CTR) guaranteed between 63% and 125% at a forward current of 10 mA, this part provides a predictable gain window for the isolated signal path.
Temperature range and switching speed for harsh environments
The transistor output's typical rise time is 2.4 µs and fall time 2.7 µs, with turn-on and turn-off times of 5 µs and 3 µs respectively. That puts the practical switching ceiling around 100 kHz for a 50% duty-cycle square wave; for faster isolated data paths, a logic-output optocoupler would be a better fit. The 300 mV max Vce saturation at the rated output current keeps power dissipation low in the output stage.
No official successor or second-source cross-reference appears in the Vishay documentation; if you need a pin-compatible alternate for dual-sourcing, a parametric search across Vishay's own CNY65 family or a direct inquiry with the factory would be the next step.