The H11A617D300W is marked obsolete by onsemi, meaning the manufacturer has ended production and no further factory orders are accepted.
5300Vrms isolation in a 4-DIP package
Rated for 5300Vrms isolation, this single-channel optoisolator provides galvanic separation between a DC input and a transistor output — sufficient for reinforced insulation in mains-referenced circuits.
CTR range and switching speed
Current transfer ratio spans 160% to 320% at 10 mA forward current — the wide min-to-max spread means the downstream logic must tolerate the full gain variation without saturating or starving the output pull-up. Typical rise and fall times are 2.4 µs each, placing the usable switching frequency below roughly 100 kHz for clean edge transitions — adequate for 50/60 Hz line-sync feedback and low-speed digital isolation.
Temperature range and forward drive
Operating from -55°C to 100°C, the H11A617D300W covers industrial and extended-temperature environments — the 1.35 V typical forward drop at 10 mA is consistent across the range, though CTR degrades at temperature extremes.