What the interrupting ratings mean for coordination
The Siemens SENTRON 3VA2010-5HN32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuously from 40 °C through 70 °C — no derating needed across that span, per the datasheet. The interrupting capacity tells you where this breaker fits in a selective coordination study: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. For a 480 V panel with a 65 kA available fault current, this unit gives you nearly 10 kA of headroom above a standard 65 kA-rated MCCB — useful when the transformer is close to the main switchboard.
Trip unit and auxiliary contact configuration
The overcurrent release is an ETU350 electronic trip unit — that is the programmable, curve-shaping type, not a fixed thermal-magnetic.
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for a 100 A frame.