The H11A617C300W is marked obsolete by onsemi. No official successor or second-source is recorded.
5300Vrms isolation and CTR window
The current transfer ratio (CTR) is specified at 100% minimum and 200% maximum, tested at 10mA forward current, giving a defined gain window for the optocoupler's transistor output. Output transistor handles up to 70V collector-emitter and 50mA continuous current, with a typical Vce(sat) of 400mV. Rise and fall times are 2.4µs typical — adequate for low-speed isolation up to about 100kHz switching.
Through-hole 4-DIP — board-fit and temperature range
Housed in a 4-DIP (0.400-inch, 10.16mm) through-hole package. The 2.54mm pin pitch and standard DIP footprint make it a drop-in replacement for legacy designs or rework. Operating temperature spans -55°C to 100°C, covering industrial and military-grade environments. DC input type with a typical forward voltage of 1.35V at 10mA. Maximum forward current is 50mA — the LED side is driven by a logic-level or microcontroller GPIO through a current-limiting resistor.