Siemens SENTRON 3VA2216-7MN32-0CH0 — 160 A MCCB, Motor Protection, ETU350M
The Siemens SENTRON 3VA2216-7MN32-0CH0 is a 3-pole molded case circuit breaker rated for 160 A continuous current at 40 °C, built around the ETU350M electronic trip unit for motor protection duties. Its breaking capacity reaches 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V — figures that cover high-fault installations like large motor control centers or transformer secondaries. The ETU350M trip unit provides adjustable overload and short-circuit protection with phase failure detection, plus an undervoltage release (UVR) is integrated — essential for coordinated motor branch circuits where loss-of-voltage protection is required. Auxiliary contact configuration includes 2 auxiliary switches plus 1 trip alarm switch (HQ), giving status feedback for PLC or annunciator inputs without a separate interface module.
Ratings and Thermal Derating
Rated continuous current Iu is 160 A, and it holds that rating up to 50 °C ambient. Above that, derating applies: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. For a panel running warm — say, near a drive cabinet — the 60 °C figure is the one to budget against. Rated insulation voltage Ui is 800 V, and the breaker's maximum power loss is 75 W — that heat has to be vented in a sealed enclosure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage floor matters if this sits as a critical spare in an unheated warehouse.
Panel Fit and Integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in this class — it occupies one 105 mm slot on a DIN-rail or panel-mount base. Depth of 86 mm leaves clearance for rear-connected busbars or cable lugs. Latching endurance is rated at 20,000 operations.