Schneider Electric XB7-ND21 2-Position Selector Switch

Schneider Electric Harmony XB7ND21 is a monolithic, two‑position maintained (stay‑put) selector switch designed for a 22 mm panel cutout. It uses a black plastic bezel, provides one normally open (NO) contact, and employs screw‑clamp terminals for up to 2 x 1.5 mm² conductors. Built for panel‑mounted control, it accommodates standard 22 mm cutouts and tolerates a wide operating range from -25°C to 70°C, with the plastic bezel aiding electrical insulation and chemical resistance. This XB7ND21 variant is well suited for simple two‑state control tasks such as equipment mode selection or start/stop operations in industrial control panels.