ASCO SB11A Tri-Point Pressure Switch

ASCO SB11A Tri-Point Pressure Switch is a compact industrial switch that uses ASCO’s Tri-Point balance mechanism to monitor pressure and trigger electrical contacts in a single package. The SB11A is rated for 125-250 V AC at 50/60 Hz, making it suitable for control circuits powered from common industrial supplies. According to distributor listings, this model has been discontinued by the manufacturer, so new stock is limited to reseller inventories or used/refurbished units. Weight is listed around 3.09 lb in Radwell's product information. The SB11A designation is also associated with alternate identifiers in procurement catalogs, such as 5930-01-103-8003, reflecting its cross-reference as a general pressure switch in government and industrial catalogs. ASCO's Tri-Point family is characterized by a tri-fulcrum balance design that coordinates multiple switching elements in a compact form, enabling precise threshold switching in a range of industrial applications.