Thermal derating and selectivity
The breaker holds full 32 A rating up to 50 °C ambient, then derates linearly to 28.8 A at 70 °C. That thermal curve matters when the MCCB shares a crowded enclosure with other heat sources — a panel OEM can count on the full ampacity below 55 °C without oversizing the frame. The TM240 release has an adjustable long-time delay tr max of 1 s, giving the commissioning engineer room to coordinate with downstream branch breakers for selective tripping.
Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm tall — a standard MCCB footprint that drops into existing SENTRON 3VA panel cutouts. The breaker ships with 2 auxiliary switches (HQ type) pre-installed, so the MRO planner gets status feedback without ordering a separate accessory kit.