What this MCCB is and what it carries
The Siemens SENTRON 3VA2110-5JP32-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full operating range from -25 °C to 70 °C — no derating needed up to the top end. It is designed specifically for line protection (cable and busbar feeder protection), not motor or generator duty. The interrupting ratings climb with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That high SCCR at the lower voltages means it can sit upstream of a fault-current-heavy distribution board without requiring a current-limiting fuse ahead of it — a panel-space saver in high-available-fault installations. The trip unit adjustable range spans 150 A to 1 200 A, so the 100 A frame supports a wide band of protection settings. A trip indicator is present on the front face for quick visual identification of a tripped breaker on a crowded panel. It ships with a built-in communication function and an undervoltage release (UVR) that trips the breaker when control voltage drops below a threshold, standard for emergency-stop or safety-shutdown chains. The auxiliary switch complement is 2 auxiliary switches plus 1 trip alarm switch HQ, which gives three independent signal paths back to the PLC or DCS: one for breaker open/closed, one for the UVR state, and one dedicated to trip events. That saves adding a separate auxiliary contact block in many coordination schemes. Physical footprint: 105 mm wide, 181 mm tall, 86 mm deep. Mounts on a DIN rail or directly to a backplate. The depth (86 mm) is shallow enough to fit a standard 200 mm deep enclosure with room for wiring gutters. Power loss at rated current is 12.5 W maximum — negligible for thermal budgeting inside a sealed panel but worth noting if the enclosure is densely packed with multiple breakers.
Selectivity and coordination notes
Because this is a line-protection MCCB with an adjustable trip unit (150–1 200 A range), it can be coordinated downstream of a larger SENTRON 3VA breaker or upstream of a 3VA1 frame. The 100 A continuous rating and 187 kA SCCR at 240 V give headroom for a high-fault panelboard. For a site engineer building a selective coordination study, the trip curve data (I²t and instantaneous settings) is available in the Siemens selectivity manual — not reproduced here, but the part is designed for full selectivity with downstream 3VA1 breakers up to the interrupting rating. The undervoltage release (UVR) also allows remote tripping from a safety PLC or E-stop circuit, which is useful for emergency-off zones.