Parametric profile and board fit
The H11A817: Single-channel transistor-output optoisolator in a 4-DIP (0.300", 7.62mm) through-hole package. The 5300Vrms isolation rating covers reinforced insulation requirements in mains-referenced circuits — suitable for industrial control interfaces, PLC input modules, and isolated feedback paths in power supplies. Current transfer ratio spans 50% to 600% at 5mA forward current, giving wide design margin for logic-level translation across the isolation barrier. Output transistor handles up to 70V and 50mA continuous, with a 200mV Vce(sat) ceiling at rated current. Operating temperature range of -55°C to 100°C covers industrial and some extended-temperature environments. Typical rise/fall times of 2.4µs each support data rates up to roughly 100 kbps — adequate for slow digital signals, status feedback, and PWM below 10 kHz.
If your design is still in development, consider migrating to a current-production single-channel DIP-4 optoisolator with equivalent 5300Vrms isolation and comparable CTR range. We can quote cross-reference options alongside the H11A817 to give you a hedge.