Panasonic Compressor model 2JS438D3AA04 is : 

~ 2JS438D3AA04 Compressor 2.5hp – Very close match to your 2JS438D3AA04 model (≈2.5 HP). Ideal choice if you need the exact part type (R22 rotary compressor).
~MATSUSHITA Compressor 2.5HP (incl 2JS438 variants) – Includes compatible Panasonic/Matsushita 2.5 HP compressors (variants around the 2JS438 family). Good mid-range option.


Specifications for Panasonic 2JS438D3AA04 compressor:

~Designed as a rotary compressor for air conditioning use, typically in split AC systems.
~Refrigerant: R22 (older refrigerant type).
~Horsepower Class: Approx 2.5 HP condenser compressor.
~Voltage: ~220–240 V AC, single-phase, 50 Hz typical.
~Cooling Capacity: Around 7,600 W (≈25,900 BTU/h).
~Displacement: ~43.8 m³/rev (compressor displacement).