MCCB for motor protection — 100 A, 3-pole, with undervoltage release
The Siemens SENTRON 3VA2110-7MN32-0CL0 is a 3-pole molded case circuit breaker (MCCB) rated 100 A continuously at ambient temperatures from 40 °C up to 70 °C, making it a stable choice for motor branch circuits in warm enclosures or near hot equipment. Its motor protection design integrates phase failure detection and a trip indicator, so a single device handles overload, short-circuit, and phase-loss protection for a three-phase motor load. Breaking capacity reaches 330 kA at 240 V AC and 242 kA at 415 V AC, which means it can interrupt very high fault currents without upstream cascading — useful on large industrial services or transformer secondaries.
Built-in undervoltage release and auxiliary switch complement
This MCCB ships with an undervoltage release (UVR) factory-installed, so a voltage dip or intentional drop-out on the control supply trips the breaker open — common in safety circuits or emergency-stop chains where loss of control power must isolate the motor. The auxiliary switch block includes two auxiliary switches, one trip alarm switch, and one electrical alarm switch, giving the panel builder both status feedback and remote trip indication without adding separate contact blocks.
Panel fit and power loss
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — the 105 mm width is standard for a 3-pole SENTRON frame, so it fits existing busbar or cable-connection layouts without re-spacing. Maximum power dissipation is 12.5 W, modest enough that thermal derating within a standard IP54 steel enclosure is straightforward — no forced ventilation needed unless the panel is densely packed.
Lifecycle and sourcing
The manufacturer classifies this part as current-production, so it remains a standard catalog item — no last-time-buy clock running.