The ABB 1SFA899311R1200 is a PSTHM-200/18 thyristor unit, a power module designed for use within the PSTX softstarter series. This is the component that switches the motor current during the start and stop ramp; it is not a standalone softstarter but the thyristor stack that goes into a PSTX frame. The part is officially marked as obsolete. That means ABB no longer manufactures it as a standard catalog item.
Compliance documentation is on file: RoHS compliant per EU Directive 2011/65/EU and Amendment 2015/863, TSCA certification, and a Conflict Minerals Reporting Template. WEEE classification is B2B, not in scope. These documents are available for your quality and regulatory review.
The PSTHM-200/18 thyristor mounts inside the PSTX enclosure and handles the inrush and ramp-down current for three-phase induction motors.