The ABB 1SFA899211R5200 is a thyristor module set — two PSTP-4200/16 units — designed as the power switching stage inside ABB's PSTX series softstarters. It is not a standalone softstarter; it is the internal semiconductor assembly that controls the motor inrush current during start-up. The PSTX family covers softstarters from 30 A to 1250 A for three-phase induction motors. This module is sized for the 4200 A model, meaning it handles the highest-current frames in the line — typically found on large pumps, conveyors, or compressors where a direct-on-line start would cause voltage dips or mechanical shock.
The module complies with EU RoHS Directive 2011/65/EU and Amendment 2015/863, and it is classified as Business To Business (B2B) under WEEE scope — meaning it is not subject to household WEEE take-back obligations. ABB provides a CAD dimensional drawing (2CDC001079B0201) and a technical data sheet (1SFC132013C0201) for integration work.