Siemens AG 40DP107570 Contactor NEMA Size 1

Siemens 40DP107570 Contactor SZ.1 is a NEMA Size 1, three-pole open-type contactor designed to switch 3‑phase loads in industrial control panels. It supports a main circuit current rating up to 27 A and a maximum load voltage of 240 VAC, making it suitable for starting and stopping motors, pumps, fans, and conveyors in manufacturing, water treatment, and HVAC applications. The unit is part of the Siemens 40DP family of contactors and is specified as SZ.1 size 1 3‑phase configuration with an open (NEMA Type 1) enclosure, intended for indoor panel mounting. The model number US2:40DP107570 appears in Siemens’ catalog and distributor listings, confirming its status as a standard commercial 3‑pole contactor option compatible with typical control circuit architectures. For exact coil voltage, coil tolerance, mechanical life, and available auxiliary contact options, consult the official datasheet or approved Siemens distributors, as these variants can vary by coil rating and regional version. Common applications include motor control in industrial automation, conveyors, HVAC equipment, pumps, and other equipment requiring reliable on/off control of 3‑phase loads in panel assemblies.