The Fuji NEMA1-C2-203 is a NEMA1 kit mini — an enclosure accessory that adapts a compact drive chassis for NEMA1 (finger-safe / drip-proof) installation. It covers the drive's exposed terminals and fan area so the assembly meets the NEMA1 standard for indoor use where falling dirt and light moisture are present.
Because this is an enclosure kit rather than an active electronic component, its availability tends to be steady — no semiconductor allocation cycles affect it.