The onsemi H11A617AW is a single-channel optocoupler with a DC-input LED and a phototransistor output in a 4-DIP through-hole package (0.400-inch, 10.16mm lead spacing). It provides 5300Vrms galvanic isolation between input and output, suitable for safety isolation in industrial control interfaces, PLC digital inputs, and AC mains detection circuits. The current transfer ratio (CTR) is specified at 40% minimum and 80% maximum when the LED forward current is 10mA, defining the input drive needed to guarantee the output switches into saturation. Operating temperature spans -55°C to 100°C, covering industrial and extended-temperature environments without derating.
Switching speed and output ratings
Typical rise and fall times are 2.4µs each, setting the practical switching frequency ceiling around 100 kHz for logic-level signals — above this the output pulse width narrows and the downstream receiver may miss edges. The output transistor can handle up to 70V collector-emitter voltage and 50mA continuous current, with a maximum Vce saturation of 400mV at rated load — the saturation voltage determines the logic-low level margin in 5V or 3.3V systems. Maximum DC forward current through the input LED is 50mA, with a typical forward voltage of 1.35V at nominal drive — the LED current directly sets the CTR operating point and must be limited by an external series resistor.
Obsolete lifecycle — sourcing through independent channels
No direct pin-compatible successor order code is listed by onsemi for this specific variant — the H11A base product number covers a family of optocouplers with different CTR bins and package options, but no single drop-in replacement is designated. The 4-DIP footprint is common across many optocoupler families, so a functional equivalent from another manufacturer may fit the same board layout with CTR and isolation voltage verification.