The ABB 1SFA899311R1132 is a PSTHM-series thyristor module, identified by the technical code PSTHM-132/18, designed as a replacement power component for ABB PSTX softstarter units. It is a softstarter class component, meaning it handles the inrush current limiting and voltage ramp-up for three-phase induction motors during start, reducing mechanical and electrical stress on the driven load.
This thyristor module is classified as Obsolete per the manufacturer's lifecycle status, which means ABB no longer manufactures it as a standard production item.
Fit and deployment context
The module is specified as suitable for PSTX softstarters, so it is the correct power-stage thyristor assembly for those units when a factory replacement is needed. In a panel or motor control center, the PSTHM-132/18 mounts inside the PSTX enclosure, connecting between the mains supply and the motor output — it is not a standalone device but a serviceable sub-assembly within the softstarter.