Schneider Electric Square D SDT120 Circuit Breaker

Schneider Electric's Square D SDT120 circuit breaker is a molded‑case, single‑pole protective device rated for 20 amps at 120 volts, designed for use in Square D SDT/Trilliant panel systems. The 1P, 120V SDT120 interrupts current on a single hot conductor in 120V circuits and provides overcurrent protection for compatible Trilliant/Square D installations. In supplier catalogs it's listed as SDT120, confirming its place in the SDT family used in Trilliant panel boards and serving as a direct replacement for legacy SDT components in compatible Square D configurations. Its compact form and 1‑pole 20A/120V electrical characteristics align with other SDT breakers, helping maintain consistent protection across aging SDT‑series panels. Typical applications include residential and light commercial branch circuits wired through SDT panels that specify SDT120 1P 20A 120V devices, ensuring continuity of protection where original SDT components are referenced or where a compatible SDT replacement is required.