The Siemens 3VA1050-2ED32-0HH0 is a 3-pole IEC frame 100 circuit breaker rated 50 A with a class B breaking capacity of 16 kA at 415 V. That class B rating means it handles moderate fault levels typical of distribution sub-feeders — enough headroom for selective coordination with downstream 10 kA branch breakers, but not the 25+ kA class C needed at a main service entrance. The TM210 thermal-magnetic trip unit is factory-fixed: overload protection Ir is set at 50 A (non-adjustable), and short-circuit protection Ii is fixed at 10 × In (500 A). No field dials to mis-set — good for a BOM line where the engineer wants repeatable coordination without commissioning tweaks.
Integrated accessories — what ships on the breaker
This variant comes pre-populated with a shunt trip (STL) rated 12–30 V DC or 24 V AC 50/60 Hz, plus two HQ auxiliary switches and one HQ trip alarm switch. That means the panel builder does not need to order and install separate accessory packs — the shunt trip is wired for remote tripping (fire alarm, E-stop chain), and the aux contacts report breaker position to a PLC or status lamp. The HQ designation indicates high-auxiliary-current rating for the switch contacts, suitable for control circuits up to the standard 6 A AC-15 / 3 A DC-13 range. A nut keeper kit is also included in the package for secure DIN-rail mounting.
Where it fits — panel and coordination context
The 3VA1 frame 100 mounts on standard DIN rail in an IEC distribution panel or enclosure. At 50 A fixed, it is sized for a motor control center feeder, a lighting sub-panel, or a small UPS bypass circuit. The 16 kA Icu at 415 V coordinates cleanly with a 25 kA upstream main breaker (typical class C) if the let-through energy is within the downstream breaker's I2t withstand. For North American installations, verify that the 415 V rating aligns with your 480Y/277 V system — the breaker is IEC-rated, not UL489 listed, so it is suited for IEC-spec panels and export projects.