What the interrupting ratings mean for your panel
The Siemens SENTRON 3VA1050-2ED42-0KA0 is a 4-pole molded case circuit breaker rated for 50 A continuous current (Iu) across a 40 °C to 50 °C ambient — no derating needed up to 50 °C, then it steps down to 48 A at 55 °C and 45 A at 70 °C. The interrupting capacity climbs to 52.5 kA at 240 V, drops to 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V. That spread tells you where it can clear a fault without upstream coordination: at 415 V it handles a 32 kA bolted fault, which covers most industrial distribution panels fed from a 1 MVA transformer. The TM210 thermal-magnetic release gives fixed thermal and magnetic trip settings — no field-adjustable curve, so the selectivity study needs to account for that fixed characteristic.
Panel fit and integration notes
The breaker measures 70 mm deep, 101.6 mm wide, and 130 mm high — a standard 4-pole MCCB footprint that drops into most SENTRON distribution panels without re-drilling. Front protection is IP40, so it's fine for a clean indoor panel but not washdown zones. No auxiliary contact version is fitted (order separately if you need a status feedback contact). The overcurrent release is a TM210 — thermal-magnetic, non-electronic, no communication function, no phase-failure detection. If your spec calls for ground-fault monitoring or an undervoltage release, this variant doesn't carry them; the shunt trip (STL) is the only integrated auxiliary release. Latching endurance is rated at 15,000 operations — enough for a main or feeder breaker, not a switching-duty application.