The TM210 thermal-magnetic release provides LI protection (long-time and instantaneous), with a fixed instantaneous trip at 400 A.
The 40 A continuous rating holds at 45 °C and 50 °C, then drops 1 A per 5 °C step above 55 °C — a standard thermal derating curve that matters if the breaker sits in a warm enclosure or next to other heat sources. The fixed instantaneous pickup at 400 A (10× In) is typical for a line-protection MCCB — it clears hard faults fast without nuisance tripping on motor inrush. The LI protection function means no ground-fault or short-delay element; this is a straightforward branch-circuit breaker, not a main with selective coordination.
The 1-pole chassis measures 25.4 mm wide (1 inch), 130 mm tall, 70 mm deep. The IP40 front protection means it is splash-proof from the front but not sealed; suitable for indoor panels, not washdown zones. No auxiliary contacts or motor drive fitted on this variant (0 CO contacts, no motor drive option).