What it is and what it does
Siemens 3VA2216-5MP32-0AA0 is a SENTRON molded case circuit breaker for motor protection — 160 A continuous, 3-pole, with an ETU550M electronic trip unit supporting adjustable trip classes 10A, 10/10E, 20/20E, and 30.
Breaking capacity — what the numbers mean for panel coordination
Rated breaking capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. At 415 V, 121 kA means this MCCB clears a bolted fault up to that level without rupturing — critical for high-fault panels fed by large transformers or paralleled generators. The sharp drop to 4.5 kA at 690 V tells you this is a 690 V-rated device that relies on the arc-quenching design for low-voltage distribution; it is not intended for medium-voltage direct switching.
Motor protection trip unit
The ETU550M is a microprocessor-based overcurrent release with phase failure detection and communication capability. Adjustable trip class lets you match the thermal curve to motor start profiles — class 10A for fast starts (short stall time), class 30 for high-inertia loads like centrifuges or crushers. No undervoltage release, no ground-fault monitoring on this variant.
Panel fit and environment
Dimensions 181 mm high, 105 mm wide, 86 mm deep — fits standard SENTRON 3VA panel cutouts and busbar systems. IP40 front protection means it is suitable for enclosed distribution boards; no washdown rating. Operating temperature range -25 °C to 70 °C, storage down to -40 °C.