Square D™ Micrologic™ S163A Micrologic™ 5.0 P Electronic LSI Breaker Trip Unit, 5 Poles, P/R Frame, For Use With PowerPact™ NT, NW Molded Case Circuit Breaker
Square D™ S164A Micrologic 6.0 P Electronic LSIG Breaker Trip Unit, 6 Poles, P/R Frame, For Use With PowerPact™ NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, RL Molded Case and Insulated Case Circuit Breaker