Schneider Electric Square D LA11127 Undervoltage Trip

LA11127 Undervoltage Trip is a Square D/Schneider Electric circuit-breaker accessory for PowerPacT LA, LH, and Q4 molded‑case breakers that provides 24V DC undervoltage protection to trip the breaker when the control voltage falls below the threshold. The device uses two brown 18 AWG copper leads for control-circuit connections. Schneider Electric lists LA11127 as discontinued as of March 6, 2023, and notes it is not normally stocked, with no direct replacement listed. It is designed specifically for use with PowerPacT LA/LH/Q4 frame breakers and appears in legacy Square D catalogs as an undervoltage trip accessory for these MCCBs.