Above that, the thermal curve steps down: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C — so if this breaker lives in a hot enclosure, the real-world ampacity is lower than the nameplate 50 A. The interrupting capacity is the headline number for a sourcing decision: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The overcurrent release is a TM240 — thermal-magnetic, fixed at 240 A frame rating, with the 50 A continuous pickup set by the trip unit. It's a straight line-protection breaker, not a multifunction device.
Integration and physical fit
The breaker measures 130 mm high, 101.6 mm wide, and 70 mm deep — a 4-pole MCCB that fits standard 100 mm-wide panel cutouts. Front IP40 protection means it's suitable for dry indoor panels but not washdown environments.