The Siemens 3VA2216-7MN32-0BL0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection, rated at 160 A continuously across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. That flat thermal curve is the headline spec for anyone sizing this into a warm panel: it holds 160 A at 70 °C, which means the breaker isn't the weak link when the enclosure runs hot. Three-pole construction, 181 mm tall, 105 mm wide, 86 mm deep — it fits the standard SENTRON 3VA mounting footprint, so a panel laid out for a 3VA2116 frame will accept this without re-drilling.
Interrupting capacity and selectivity
Short-circuit breaking capacity hits 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V. At typical 400 V industrial supply, 242 kA gives substantial headroom for high-fault installations — you can coordinate downstream without worrying about the main breaker opening on a branch fault.
Motor protection features
Built-in phase failure detection trips the breaker if one phase drops out — a common cause of single-phasing motor burnout. The undervoltage release (UVR) provides a separate trip path for undervoltage conditions, which is useful for sequenced restart schemes or safety circuits that need to drop the motor on a sag. Auxiliary switching is handled by two auxiliary switches plus one trip alarm switch and one electrical alarm switch, all integrated into the breaker housing. That gives four separate signal outputs for status monitoring, fault annunciation, or PLC inputs without needing external contactors.