Quick take
The manufacturer-supported filter family is HAF-QIN. Use a compatible alternative only when the listing explicitly covers HAF-QIN and the RF27T5201 series.
Manufacturer mapping
Samsung’s U.S. HAF-QIN page includes RF27T5201** in its fit list.
Model suffixes
Check the complete refrigerator model code because color and market suffixes vary.
OEM baseline
Samsung HAF-QIN gives the clearest fit and performance reference.
Recurring savings
Compatible replacements can lower yearly cost, making retailer comparison worthwhile for repeat buyers.