What this MCCB delivers
The Siemens 3VA2110-7MS32-0KC0 is a SENTRON molded case circuit breaker rated for 100 A continuous current, 3-pole, with an ETU310M electronic trip unit. Its interrupting capacity hits 330 kA at 240 V and 242 kA at both 415 V and 440 V — that is genuine high-fault-level protection for a main or feeder breaker in an industrial distribution panel. At 690 V it still clears 52.5 kA, so it handles mixed-voltage installations without a derating surprise. The 800 V rated insulation voltage (Ui) confirms it is built for 690 V line-to-line systems. Thermal derating is honest: full 100 A up to 50 °C, then 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. If your panel ambient runs above 50 °C, size the load side accordingly — the breaker will track that curve. Maximum power loss is 75 W, which matters for enclosure heat calculations in a sealed cabinet. This version ships with a shunt trip (STL) for remote opening and two high-capacity auxiliary switches (HQ) for status feedback. No undervoltage release, no ground-fault monitoring, no communication module — it is a straightforward power breaker with remote-trip capability. The basic switch core is order code 3VA2110-7MS32-0AA0, and the integrated auxiliary trip is 3VA9688-0BL33, both serviceable separately.
Panel fit and integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. That footprint matches the SENTRON 3VA2 fixed-mount frame — it bolts into the standard MCCB cutout without adapters. No trip indicator on the front face, so plan for a separate status lamp if local indication is needed. Latching endurance is rated at 20,000 operations, which is typical for a distribution breaker not cycled daily. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. That covers unheated warehouses and outdoor enclosures in most climates. No communication function and no phase-failure detection — this is a pure overcurrent + shunt-trip device, not a smart breaker.