What it is and what it does
The Siemens SENTRON 3VA2116-6HN32-0DD0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 160 A flat across the entire operating temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It is fitted with an ETU350 electronic overcurrent release, giving adjustable thermal-magnetic or fully electronic protection curves depending on the application. The rated insulation voltage Ui is 800 V, and the front face carries IP40 protection — fine for a clean indoor panel, not for washdown zones.
Breaking capacity — the real number for coordination
The interrupting rating is what decides whether this breaker clears a fault or welds shut. At 240 V it handles 242 kA; at 415 V and 440 V it holds at 187 kA; at 500 V it drops to 121 kA; at 690 V it is rated 3.7 kA. That steep roll-off above 500 V means you need to check the available fault current at your system voltage before committing the BOM line — the 690 V figure is low enough to trip up anyone assuming a flat curve.
Panel fit and auxiliaries
Footprint is 105 mm wide, 181 mm tall, 86 mm deep — standard for this frame size. It ships with three auxiliary switches (HQ type) built in, and an undervoltage release is present. No communication module on this variant, so it is a standalone breaker for a distribution board or motor control center, not a networked power-monitoring node. Power loss is 28 W maximum at rated current — a number to factor into enclosure thermal calculations if the panel is densely packed.