The ABB 1SFA899312R1004 is a circuit breaker holder, type PSCBH-4, designed to mount a branch-circuit breaker onto ABB PSTX-series softstarters. It carries the Technical Information code PSCBH-4, confirming it is the four-pole variant for PSTX frames. This is a panel-mount accessory that keeps the breaker and softstarter wiring bundled in one assembly, saving DIN-rail space in the enclosure.
The holder accepts a UL/CSA branch-circuit breaker and bolts directly to the PSTX softstarter's input terminals. It eliminates a separate breaker enclosure and shortens the power-wire run between the breaker and the softstarter. The PSCBH-4 variant handles three-phase plus neutral or a fourth pole for an additional switched leg, matching the PSTX frame's mounting hole pattern.
