onsemi H21A5

The H21A5 is a transmissive opto sensor in a slotted switch configuration with a phototransistor output, a 3.15 mm slot width, and a maximum collector-emitter voltage of 55 V. It operates with a 20 mA forward current and a 5 V collector-emitter supply voltage. The device has a minimum current transfer ratio of 2.00 and is packaged in a through-hole format with pins for anode, cathode, collector, and emitter. The operating and storage temperature range is from -55°C to +100°C. The input diode has a reverse voltage rating of 6.0 V and a power dissipation of 100 mW; the output transistor dissipates up to 150 mW. The device is rated for soldering temperatures of 260°C for 10 seconds and 240°C for 5 seconds.