Its rated continuous current Iu is 50 A, and it holds that rating from 40 °C up to 50 °C ambient; above that it derates to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. That thermal curve matters for a panel sitting near a heat source or in a non-climate-controlled enclosure — the 50 A rating is only valid up to 50 °C ambient.
This MCCB carries interrupting ratings that vary by system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. For a 415 V distribution board, the 52.5 kA figure gives headroom above typical utility fault levels (often 25–50 kA), so it coordinates well downstream of a larger upstream breaker or fuse. At 690 V the 10.5 kA rating is lower — check your available fault current if the breaker lands in a 690 V circuit.
Panel integration and auxiliary wiring
The 3VA1150-3EF36-0KH0 mounts in a standard panel footprint with a width of 76.2 mm, depth of 70 mm, and height of 130 mm. The integrated auxiliary trip order code is 3VA9688-0BL33.
Overcurrent release and ratings
The overcurrent release is a TM240 — a thermal-magnetic type with a 240 A frame rating, set for the 50 A continuous current. The breaker has a trip indicator and a latching endurance of 15,000 operations.