The Acti 9 iEZ EZD100M MA 3P 50A is a three-pole, 50A electronic circuit breaker from Schneider Electric's advanced Acti 9 range. It is equipped with a Micrologic "MA" electronic trip unit, which stands for "Modbus Addressable." This unit provides not only adjustable protection for overloads and short-circuits but also built-in Modbus communication capability