What this MCCB is and what it does
The Siemens SENTRON 3VA2010-6HN32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C through 70 °C ambient — no derating across that span, per the datasheet. It is designed for line protection in distribution panels, with an interrupting capacity of 242 kA at 240 VAC, 187 kA at 415 V and 440 VAC, 121 kA at 500 VAC, and 3 kA at 690 VAC. The 100 A rating holds flat across the full ambient range — no derating needed from 40 °C to 70 °C, which simplifies panel sizing in warm enclosures.
Built-in auxiliary and undervoltage release
This breaker ships with an undervoltage release (UVR) and a factory-fitted auxiliary switch block: 2 auxiliary switches plus 1 trip alarm switch (HQ). The UVR trips the breaker when control voltage drops below a threshold, which is standard for safety circuits that need to guarantee a de-energized state on loss of control power.
Physical fit and panel integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in the SENTRON 3VA frame — it occupies three 35 mm DIN-rail modules. Depth of 86 mm leaves clearance for rear-connected busbars or cable lugs in a typical distribution panel.
Power loss and thermal management
Maximum power loss is 16 W at rated current. In a sealed enclosure with multiple breakers, that figure feeds into the heat budget — 16 W per pole is within the range for natural convection cooling in a standard metal cabinet, but worth checking if the panel is densely packed.