What this MCCB carries — and where the rating matters
The Siemens SENTRON 3VA2116-5HN32-0JL0 is a 3-pole molded case circuit breaker rated for 160 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. Breaking capacity hits 187 kA at 240 V and 121 kA at 415 V, which means it can interrupt a fault upstream of a 2 MVA transformer without the arc flashing over to the bus. Line protection design means the trip curve is shaped for cable and busbar protection, not motor starting.
Panel fit — how wide on the rail?
Footprint is 105 mm wide by 181 mm tall by 86 mm deep. That 105 mm width is three 35 mm DIN modules, so it fills the same space as a standard 3-pole MCCB. Depth of 86 mm leaves enough room behind a 200 mm deep enclosure for the line and load lugs without crimping the bends. Power loss is 25.5 W maximum. In a packed panel with multiple breakers side by side, that heat adds up — keep the ambient inside the enclosure below 70 °C or plan for forced ventilation. The breaker itself is rated for 70 °C operating ambient, but the heat rise from neighbors can push internal air past that.
Auxiliaries and releases — what ships inside
Factory-fitted with 2 auxiliary switches plus a trip alarm switch and an electrical alarm switch. Also includes a shunt trip release (STL) for remote tripping via a control signal — useful for emergency-stop circuits or PLC-based load shedding. The supplied basic switch is order code 3VA21165HN320AA0. Trip indicator and voltage trigger are present; undervoltage release and ground-fault monitoring are not.