The Siemens 3RK1911-2BK00 is an ECOFAST connector set with a Han 10E insert, designed for motor connection in a coupling enclosure with a low profile and a PG13 male thread.
The substance prohibitance date is 05/01/2012, which typically aligns with RoHS compliance deadlines for the European market.
This connector set is part of the ECOFAST system, a modular, pre-wired cabling solution for motor feeders and sensors that snaps onto DIN rail and reduces wiring time in control panels.