What this MCCB carries and where it fits
The Siemens SENTRON 3VA2116-6HN32-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 160 A at 40 °C. Its interrupting capacity reaches 242 kA at 240 V and 187 kA at both 415 V and 440 V, dropping to 5 kA at 690 V — figures that define its use as a main or feeder breaker in high-fault industrial distribution panels. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves, with a shunt trip (STL) for remote opening and a voltage trigger for undervoltage or overvoltage signals. It carries 2 auxiliary switches plus 1 trip alarm switch (HQ) for status feedback to a PLC or DCS — essential for a safety instrumented function where the breaker must report its state back to the SIS logic solver.
Thermal derating and enclosure planning
Rated continuous current holds at 160 A up to 50 °C; above that it derates linearly to 136 A at 70 °C. In a panel with ambient near 55 °C — common in a petrochemical switchroom with no active cooling — expect 154 A available. The 86 mm depth and 105 mm width fit standard MCCB mounting footprints; plan for the 181 mm height plus clearance for the rotary handle and auxiliary wiring. Maximum power loss is 25.5 W. In a sealed enclosure with multiple breakers, that heat must be factored into the thermal budget — a 160 A frame at full load dissipates roughly as much as a small relay panel.