The MA trip unit provides short-circuit (magnetic) protection only; there is no thermal overload element, so upstream or separate overload relay handles that function.
Rated Icu at 380/415 V AC is 70 kA, dropping to 65 kA at 440 V, 50 kA at 500 V, and 35 kA at 525 V. At 660/690 V AC it still holds 10 kA. Under UL 60947-4-1, Icu is 85 kA at 240 V AC and 65 kA at 480 V AC.
Front connections top and bottom. Connection pitch is 35 mm. IP40 protection, IK07 impact resistance. Ambient conditions: 0 to 95 % relative humidity, operating altitude up to 2000 m without derating, 2000–5000 m with derating.
