Its 50 A continuous current at 40 °C holds steady all the way to 50 °C, then derates to 45 A at 70 °C, which is useful if you are cramming this into a warm panel.
Interrupting capacity — where it earns its keep
The headline number here is 187 kA at 240 V, which drops to 121 kA at 415 V and 75.6 kA at 440 V.
This part carries a lifecycle status of current, meaning Siemens still actively manufactures it. No last-time-buy notice, no successor code to track. For a BOM line that needs a 50 A MCCB with a TM210 release and a 3-pole footprint, this is the direct order code — not a cross-reference or a second-source.
The front face carries an IP40 rating, so it is fine for a typical IP54 or IP65 enclosure as long as the door protects it from direct water jets.
Thermal performance across temperature
At 55 °C it drops to 49 A, at 60 °C to 48 A, at 65 °C to 46 A, and at 70 °C to 45 A. Maximum power loss is 14.6 W at full load — negligible for thermal budgeting in most enclosures.