The Schneider Electric EZAPLUG3L is a 3-pole plug-in base for the Easypact EZC100 family of molded-case circuit breakers (CVS100BS, EZC100 GR12T variants). It accepts plug-in breaker units rated 15 A to 50 A and is itself rated for a maximum bus current of 100 A. The plug-in mounting mode means the breaker module snaps onto this base without hardwiring the line and load connections — useful for panel layouts where you want to swap a breaker without disturbing the bus bars or downstream wiring.
Integration note
Since it is a 3-pole base, it accepts only 3-pole EZC100 breaker units. The 100 A bus rating is the maximum current the base can carry; the actual breaker installed must be sized for the load (15 A to 50 A per the kit description). Verify that the bus bar system and downstream conductors are rated for the same fault current as the breaker — the base itself does not provide overcurrent protection.