What this MCCB is and why it matters for motor circuits
The Siemens 3VA2110-5MP32-0AA0 is a SENTRON molded case circuit breaker (MCCB) built specifically for motor protection, carrying a continuous rated current of 100 A across the entire ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. 3-pole design with adjustable trip class (Tc CLASS) selectable among 10A, 10/10E, 20/20E, and 30/30E. The interrupting ratings are substantial: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — so this breaker can clear a bolted fault on a 480 V distribution bus without upstream coordination headaches.
Motor protection features: phase failure detection and communication
This MCCB includes phase failure detection — if one leg drops out on a three-phase motor, the breaker trips rather than letting the motor single-phase and cook the winding insulation. It also has a communication function, which means it can report status or trip events to a PLC or SCADA system over a bus — useful for a maintenance team that wants to know why a line stopped without walking to the panel. The adjustable trip class range (10A through 30/30E) is wider than the fixed 10 or 20 class found on many basic motor circuit breakers; the 10A setting is tight enough for submersible pumps that start unloaded, while the 30/30E handles the long acceleration of a large fan.
Panel fit and environmental limits
Dimensions are 181 mm high by 105 mm wide by 86 mm deep — a standard MCCB footprint for a 100 A frame, so it drops into most existing SENTRON panel layouts without re-drilling the mounting plate. Operating temperature range is -25 °C to 70 °C; storage range goes from -40 °C to 80 °C. That covers unheated warehouses and outdoor enclosures in most climates. Maximum power loss is 10 W — negligible for panel thermal budgeting, but worth noting if you're packing several breakers into a sealed enclosure.