Schneider Electric D221N General Duty Safety Switch

Schneider Electric's D221N is a two‑pole, 30 A general‑duty fusible safety switch designed for indoor 240 VAC circuits (60 Hz) with a 3‑wire configuration and a built‑in neutral, housed in a Type 1 (NEMA 1) enclosure suitable for wall or cabinet mounting in residential and light commercial panels. It accepts cartridge‑style fuses (not Edison‑base plugs); Class H or Class K fuses are standard, and when used with H or K fuses it is UL‑listed for up to 10 kA available fault current, with an optional Class R fuse kit (DRK30) enabling UL listing up to 100 kA. The unit’s body measures about 9.25 in high by 6.75 in wide by 3.63 in deep, providing a compact footprint for space‑conscious installations. Note that the D221N uses cartridge fuses; the D221NCP variant uses plug‑style fuses, which is important when selecting replacement parts or accessories.