What this MCCB is and what it does
The Siemens SENTRON 3VA2010-5HN32-0DC0 is a 3-pole molded case circuit breaker rated for 100 A continuous at ambient temperatures up to 70 °C, with an interrupting capacity of 187 kA at 240 V and 121 kA at 415 V. It is designed for line protection in industrial distribution panels and motor control centers, and includes an undervoltage release for coordinated shutdown under loss of control voltage.
Ratings that govern fit
The 100 A rating holds flat from 40 °C through 70 °C — no thermal derating curve to calculate. That means the breaker delivers its full continuous current even in a hot panel or outdoor enclosure, as long as ambient stays at or below 70 °C. The 187 kA at 240 V is the maximum fault current it can safely interrupt at that voltage; at 690 V the interrupting capacity drops to 3 kA, so verify the available fault current at the point of installation.
Panel integration
The 3VA2010-5HN32-0DC0 mounts on a DIN rail or directly to a panel backplate. Dimensions are 86 mm depth, 105 mm width, 181 mm height. The 3-pole footprint matches standard SENTRON 3VA fixed-thermal-magnetic breakers, so it swaps into an existing 3VA lineup without re-drilling the gland plate.