What this 1-pole 50 A MCCB does on the line
The TM210 trip unit gives you adjustable thermal pickup (Ir) fixed at 50 A and magnetic instantaneous (Ii) fixed at 500 A — no field-adjustable dials, so what you order is what trips. That's a deliberate choice for applications where the load current is known and you don't want someone cranking the trip setting past the wire rating during a troubleshooting session.
Maximum power loss is 4.9 W, so in a densely packed enclosure with several breakers side by side, the temperature rise stays manageable without forced ventilation. The derating curve holds 50 A flat from 40 °C to 50 °C, then drops to 49 A at 55 °C and 45 A at 70 °C — if your panel ambient runs hot, that's the real current you can carry.