Siemens Industrial Controls GNF322A Safety Switch mario While the non-spring return version

While the non-spring return version (SSD61U) accepts 24Vdc

Manufactured from high-grade 316 stainless steel

which can be diagnosed via temperature differentials across the discharge and suction ports

This part is compatible with a wide range of models

the switch should show continuity (0 ohms)

Siemens Industrial Controls GNF322A Safety Switch mario While the non-spring return versionThe Siemens GNF322A is a 60 Amp, 3 pole, 3 wire non fusible safety switch engineered for reliable equipment isolation in professional HVACR and industrial electrical environments. Rated for 240V AC and 250V DC applications, this general duty disconnect features a NEMA 1 enclosure, making it a standard choice for indoor installations such as commercial air handlers, rooftop units, and local motor disconnect requirements. Built with a visible blade,