Postgres dump specific table with a capital letter

Here is the complete command to dump your table in plain mode:

pg_dump --host localhost --port 5432 --username "postgres" --role "postgres"  --format plain  --file "complete_path_file" --table "schema_name.\"table_name\"" "database_name"

OR you can just do:

pg_dump -t '"tablename"' database_name > data_base.sql

Look to the last page here: Documentation