The TM240 overcurrent release handles the thermal-magnetic trip curve — thermal for overload, magnetic for short-circuit. That fixed-release design means you're not adjusting trip settings in the field; it's a straight swap-in for a panel spec'd to the TM240 curve. Breaking capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, and still 52.5 kA at 440 V.
Undervoltage release and panel fit
Common in safety circuits where a loss of control power must kill the load. It's a 3-pole frame in the 3VA1 size class, so it fits the standard mounting footprint for this series — no surprises pulling the old one out and sliding this in.
At 55 °C it derates to 78 A, at 60 °C to 77 A, and at 70 °C to 74 A.
Power loss is 21.7 W maximum at rated load. That's moderate for an 80 A MCCB — the heat stays manageable in a standard IP2X enclosure, but if you're packing a dozen of these in a small panel, add up the dissipation.