The H11A817A300W is officially obsolete per onsemi's lifecycle record. No last-time-buy window or successor order code is listed. Sourced through independent distribution against an RFQ.
Isolation and signal transfer
Rated 5300 Vrms isolation between input and output — this qualifies the part for reinforced insulation in mains-referenced circuits, such as AC-line monitoring, motor-drive feedback, and medical patient-interface isolation where the working voltage stays below 250 V. Current transfer ratio (CTR) is specified at 80% minimum and 160% maximum, both at 5 mA forward current. That spread guarantees the output transistor saturates with a defined logic-level load across the full temperature range — the 200 mV Vce(sat) ceiling confirms the margin.
Output ratings and switching speed
Typical rise and fall times are 2.4 µs each. At a 50% duty cycle this limits the practical data rate to roughly 100 kHz — adequate for slow optocoupler applications like status feedback, isolated switch sensing, or pulse-width modulation up to a few kilohertz.
Package and temperature grade
Housed in a 4-DIP package (0.400-inch, 10.16 mm body) with through-hole mounting. The tube delivery suits low-volume production or prototype builds where pick-and-place is not required. Rated for -55°C to +100°C operating temperature — the industrial/military range. The 1.2 V typical forward voltage and 50 mA maximum forward current are standard for the phototransistor optocoupler class.