Industrial 609901-T203 Power Shield Type Ss Solid State Trip Unit

609901-T203 Power Shield Type SS Solid State Trip Unit is ABB’s Power Shield overcurrent protection module for low‑voltage circuit breakers. The SS Trip Unit provides solid‑state sensing and actuation to trip the breaker when an overload or fault is detected, guarding power distribution equipment from damage. It is part of ABB’s Power Shield family of solid‑state trip devices, with documentation and catalogs noting the 609901 series and related variants in the 50–225 A class and other amp ranges. In industrial switchgear, Power Shield trip units are supported by maintenance and test tooling, including the Type 504 test set, enabling sequence verification and safe operation in field installations.