What this MCCB delivers in the panel
The Siemens 3VA1050-3ED36-0HH0 is a SENTRON-series 3-pole molded case circuit breaker rated 50 A continuous at 40 °C, with a 75.6 kA interrupting capacity at 240 V. It's designed for line protection — meaning it sits at the feeder or branch to protect cable and bus against short-circuit and overload, not as a motor-protective device. The interrupting curve drops to 52.5 kA at 415 V, 32 kA at 440 V, and holds 7.5 kA at 500 V and 690 V, so the SCCR coordination study needs to match the actual fault current at the point of installation. Thermal derating is minimal through 50 °C — still 50 A — then drops to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. That's a clean thermal curve for a panel running warm; you don't lose headroom until the ambient pushes past 50 °C. Insulation voltage is rated 800 V, which covers 480/277 V and 600 V systems with margin. The 70 mm depth and 76.2 mm width (3-inch footprint) fit standard MCCB mounting patterns in distribution panels and switchboards.
Auxiliary and release options onboard
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), and a shunt trip release (STL). That means you get remote status indication — open/closed from the aux contacts, plus a dedicated alarm contact that changes state only on a trip event — and a remote trip capability via the shunt release. No undervoltage release is fitted, and no ground-fault monitoring module is included. The trip indicator and voltage trigger are present, so local visual trip indication is standard. Communication function is not built in — this is a plain breaker, not a metering or communication variant.