Compatibility result
Samsung lists RF18A5101 models as fitting HAF-QIN. Confirm the complete model suffix before purchase.
The matched replacement is HAF-QIN/EXP. Match every character on the appliance label, including suffixes after a slash or final finish code.
Evidence strength
The source uses a model-family prefix, so the full suffix still requires confirmation.
What this result does not prove
It does not certify an unrelated aftermarket cartridge, guarantee current inventory, or replace the model’s installation manual. Open the evidence link immediately before ordering because catalogs can change.