Take ADP040T050S001A for example
Instruction AD Product No. AD=Isolation AC/DC  DD=Isolation DC/DC
P Packing A=Adapter  M=Resin Filling Module  P=PCB Module
040 Power No. 010=1W 100=10W 350=35W
T Application C=Comercial T=Industrial K=Medical S=Harsh Environment
050 Output power 033=3.3V  055=5.0V  120=12V  240=24V  11A=110V
S Custom tag. S=Standard Z=Custom
001 Product serial No. 001-999, Identity different product in the same category.
A Major upgrade Info. A-Z, the first mass production is fixed as A.