Finding a 3-way valve is difficult, there are thousands of variations.
Diverter valve / mixing valve (you can use a mixing valve as a diverter in some cases)
actuator voltage 24/120/220
Operation: L-type, T-type (at least 4 configurations)
Wiring: 2 wire (spring return), 3-wire (powered return)
This valve is intended to go with the Apollo heat pump so needs to be
220v, 3-way, T-type, 3-wire (floating)
I ended up buying this and a replacement actuator from another source to get the full spec needed