Square D 9065SR420 MotorLogic Solid State Overload Relay

Square D 9065SR420 MotorLogic Solid State Overload Relay provides three-phase motor protection for 600 V systems in a NEMA Size 4 housing, with a current setting range of 45 to 135 A. As part of the Motor Logic family, this 3‑pole solid‑state overload relay monitors run current and interrupts to prevent motor damage, and it is designed for use with Square D Type S starters and other Square D Motor Logic starter configurations. The unit is rated for up to 600 VAC and is specified for Class 20 trip behavior, delivering prompt protection against overload conditions in demanding industrial drives. Schneider Electric lists 9065SR420 as the replacement for 9065ST420, confirming compatibility within the 9065 family and offering an upgrade path for existing Square D installations.