Thomas & Betts HD323SN-TB Heavy Duty Safety Switch

The Thomas & Betts HD323SN-TB Heavy Duty Safety Switch provides a rugged, three‑phase service disconnect designed to safely isolate power in industrial and commercial distribution systems. This 3‑pole, 100 A device operates at 240 VAC, uses a fusible disconnect, includes a factory installed Neutral (NN1), and comes in a NEMA 1 indoor enclosure for surface mounting. It is commonly used to disconnect motors, feeders, branch circuits, and other industrial equipment in motor control centers, HVAC systems, manufacturing facilities, process equipment, pump stations, and analogous applications requiring dependable manual isolation during servicing or emergency shutdown. Manufactured by ABB Installation Products as part of the Thomas & Betts HD Heavy Duty line, it is a favored choice for maintenance electricians, OEM manufacturers, and system integrators for new installations and equipment isolation; this model is discontinued.