The Siemens 3VA2116-8HN42-0AA0 is a SENTRON molded case circuit breaker rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles, with an ETU350 electronic trip unit that handles line protection duty. Interrupting capacity sits at 330 kA at 415 V, which covers most industrial distribution panels fed by a medium-voltage transformer.
Interrupting ratings and what they mean for panel coordination
This breaker clears 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. Those numbers define the maximum fault current the breaker can safely interrupt at each voltage level — critical for selective coordination studies. If your available fault current at the panelboard exceeds these values at the service voltage, you need a current-limiting upstream device or a higher-rated frame.
Panel fit and integration
Dimensions are 86 mm deep, 140 mm wide, and 181 mm tall. That's a standard 4-pole MCCB footprint for a 160 A frame — fits existing SENTRON 3VA panel cutouts and busbar systems. Front protection is IP40, so it's suited for enclosed distribution boards where tools or fingers won't contact live parts through the front cover.
Trip unit and protection characteristics
The ETU350 is an electronic trip unit with adjustable overload and short-circuit protection curves. No undervoltage release, no voltage trigger, no ground-fault monitoring on this variant — it's a straight line-protection breaker. Power loss is 19.7 W maximum at rated current, which matters for thermal management inside a sealed enclosure. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C.