The Siemens 3VA2010-5KP32-0DC0 is a SENTRON 3VA2 molded case circuit breaker rated for 100 A continuous current (Iu) at 40 °C, with the ETU850 electronic trip unit providing adjustable overload and short-circuit protection curves. The 187 kA breaking capacity at 240 V drops to 121 kA at 415 V and 440 V, then to 79 kA at 500 V, and 3.4 kA at 690 V — the SCCR headroom at typical 400 V distribution voltages means this breaker clears high-fault scenarios without cascading upstream, which matters for selective coordination studies on a main or feeder position. The 100 A rating holds flat through 50 °C, then derates linearly to 85 A at 70 °C — a panel builder stacking breakers in a warm enclosure should account for that thermal curve rather than assuming the full 100 A at the ambient the cabinet actually sees.
At 105 mm wide, 181 mm tall, and 86 mm deep, this 3-pole MCCB fits the standard SENTRON 3VA2 mounting footprint. The depth of 86 mm is the dimension that governs gland-plate clearance in a shallow backpanel — verify the enclosure depth allows for rear connection access and the undervoltage release (UVR) module that ships with this variant. The auxiliary contact version carries 2 HQ switches, and the integrated auxiliary trip is order code 3VA9608-0BB25. The supplied basic switch is 3VA2010-5KP32-0AA0 — these are the factory-matched accessories, not field-retrofit options.
The ETU850 release supports communication function and other measurement functions, which means this breaker can report load data and event logs over the integrated comms interface — useful for a panel that feeds into a building management or power monitoring system without a separate metering module.
Thermal and electrical endurance
For motor-switching or frequent ON/OFF cycles, derate per the manufacturer's electrical endurance curve (not in this evidence set). Power loss is 16 W maximum at rated current, which contributes to the enclosure heat load calculation.