onsemi H21A6

The H21A6 is a transmissive opto sensor with a phototransistor output and a 3.15 mm slot width, designed for detecting the presence or absence of an object. It is housed in a compact through-hole package with pin spacing matching the standard 4-pin configuration. The device supports a maximum collector-emitter voltage of 55 V and a continuous collector current of 20 mA, with an input forward current rating of 20 mA at 6.0 V. Operating and storage temperature ranges from -55 to +100°C. The part complies with a solder temperature profile of 240°C for 5 seconds and 260°C for 10 seconds. It is built for low-power applications and features anode, cathode, collector, and emitter pins in a standardized layout consistent with the H21A series.