onsemi has marked the H11A817B300 as Obsolete. Availability is lot-specific; quantities and date codes are confirmed at RFQ.
Isolation and signal-transfer ratings
Rated for 5300Vrms isolation between input and output — this is the figure that governs creepage and clearance in the end-equipment safety certification (IEC 60950-1, IEC 60601-1 for medical). The 4-DIP 0.300-inch package provides the physical separation to sustain that voltage. Current transfer ratio spans 130% minimum to 260% maximum at If=5mA, Vce=5V. A 130% floor means the output transistor can sink at least 6.5mA with 5mA input — enough to drive a TTL or CMOS logic input with margin, but not enough for a relay coil without a buffer transistor. The 2.4µs rise and fall times (typical) set a practical data-rate ceiling around 100 kbit/s for clean edge detection. This part suits 50/60Hz mains zero-cross sensing, slow digital I/O isolation, and DC bus voltage monitoring — not high-speed communication like SPI or CAN.
Housed in a 4-DIP (0.300-inch, 7.62mm) through-hole package with a 2.54mm pin pitch. The supplier device package is 4-DIP — the same body as the standard DIP-4 footprint found on countless legacy PCB layouts. Supplied in tube packaging. The through-hole mounting means hand-assembly or wave-solder — no reflow profile needed, but the leads must be formed or socketed per the board hole pattern.
Temperature grade and operating limits
Rated for -55°C to 100°C ambient operating temperature. This is the industrial/military temperature band — suitable for outdoor telecom cabinets, industrial motor drives, and HVAC controllers. Not AEC-Q101 qualified for automotive under-hood use. Maximum ratings: 70V output collector-emitter voltage, 50mA continuous output current per channel, 50mA forward input current, and 1.2V typical forward voltage. The 200mV Vce saturation maximum keeps the output drop low when the transistor is fully on.