B11416-43 - Goodman OEM Furnace Replacement Transformer

Ive lost all power to my ecobee unit thermastate n furnace was told there was a smell of somthing burning coming thru the vents system no power now

Please, i am looking at the sec 24v; which side is common, and which 24v? most transformers show 24v and c.

Will this replace hq1056899pu? other # on it is 4000-09e07ae191. second number is very similar to that on the transformer but not exact.

i have a 1999 goodman heatherand the transformer needs to be replace. sears was unable to help. said they don' make part no longer... will this work.