What this MCCB is and what it carries
The Siemens 3VA2110-7MS36-0KH0 is a 3-pole SENTRON molded case circuit breaker (MCCB) configured as a starter protector — meaning it's built to sit ahead of a motor starter or a feeder in a distribution panel, combining overcurrent protection with a shunt trip for remote emergency-off or undervoltage control. Rated continuous current Iu is 100 A, and it holds that rating from 40 °C through 50 °C ambient without derating; at 55 °C it still carries 96 A, and at 70 °C it's 90 A — so in a warm enclosure you lose less than 10 % of the nameplate. Breaking capacity is the headline: 330 kA at 240 V AC, 242 kA at 415/440 V, 187 kA at 500 V, and 52.5 kA at 690 V. That SCCR range means it can sit on a high-fault bus without needing a current-limiting fuse upstream — useful for retrofit into older plants where the available fault current is unknown or high.
Trip unit, auxiliary contacts, and releases
The overcurrent release is an ETU310M — an electronic trip unit with adjustable thermal and magnetic settings, plus a trip indicator and voltage trigger capability. That voltage trigger (shunt trip STL) lets a safety PLC or E-stop circuit open the breaker remotely without running power through the main contacts. Auxiliary contact configuration is 2 auxiliary switches + 1 trip alarm switch HQ — enough to signal the breaker status (open/closed) and a separate trip alarm back to a DCS or panel lamp. The base switch itself is order code 3VA2110-7MS36-0AA0, and the integrated auxiliary trip module is 3VA9688-0BL33. No undervoltage release, no phase-failure detection, no communication module, and no ground-fault monitoring on this variant — it's a straight feeder/starter protector with shunt trip only. If you need those, you're looking at a different 3VA2 option.
Physical fit and panel integration
Dimensions: 105 mm wide × 181 mm high × 86 mm deep. That 105 mm width is three pole spaces at 35 mm each — standard for a 3-pole MCCB in a Siemens panelboard or on a DIN-rail adapter. The 86 mm depth means it clears a 120 mm deep enclosure with room for wiring gutters. Maximum power loss is 75 W — not negligible; if you're packing several of these in a sealed enclosure, you'll need to account for the heat in the thermal budget. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.