onsemi, HMHA2801AR2V Phototransistor Output Optocoupler, Surface Mount, 4-Pin MFP

The HMHA281 and HMHA2801 series devices consist of a gallium arsenide infrared emitting diode driving a silicon phototransistor in a compact 4-pin mini-flat package. The lead pitch is 1.27 mm.

Compact 4−Pin Package:
2.4 mm Maximum Standoff Height
Half−Pitch Leads for Optimum Board Space Savings
These Devices are Pb−Free
Applications
AC-DC Merchant Power Supply
Consumer Appliances
Industrial Motor