Read the basic code first
A designation such as 6205-2RS/C3 is not one opaque number. The basic code identifies the bearing type and dimension series; the bore code maps to nominal bore diameter; suffixes describe sealing and internal clearance.
Decode suffixes carefully
2RS indicates contact seals on both sides, while C3 identifies an internal clearance group larger than normal. A suffix is meaningful only when read with the complete designation and the applicable standard.
Confirm the controlled drawing
Commercial descriptions cannot replace the manufacturer's controlled drawing. Confirm chamfer, cage, tolerance, marking and inspection requirements before production or maintenance procurement.