What this MCCB is and where it fits
The Siemens SENTRON 3VA1110-6EF36-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. It's built for line protection — meaning it sits at the feeder or main distribution point in a panel, not downstream protecting a specific motor or drive. The interrupting ratings are what make this part stand out: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. That's a high-interrupting-capacity (HIC) frame that can handle fault currents from a large transformer or a utility feed without needing a current-limiting fuse upstream. The 70 mm depth and 76.2 mm width match the standard SENTRON 3VA mounting footprint, so it drops into existing panel layouts that already use 3VA breakers.
What the ratings mean for your panel
The 100 A rating holds flat from 40 °C up to 50 °C — no derating needed in a typical 40 °C panel ambient. At 55 °C it's 96 A, at 60 °C it's 94 A, at 65 °C it's 92 A, and at 70 °C it's 90 A. That's a gentle slope; you don't lose much headroom even in a hot enclosure. The TM240 release is a fixed thermal-magnetic type — no electronic adjustment, no communication, no ground-fault monitoring. It's a straightforward, reliable overcurrent trip for applications where you don't need selectivity curves or remote signaling. The shunt trip (STL) is built in, so you can remotely open the breaker via a control signal; the auxiliary trip accessory is order code 3VA9688-0BL32 if you need that later. No undervoltage release, no auxiliary contacts, no phase-failure detection — this is a bare-bones line-protection breaker with a high interrupt rating and a shunt trip. The IP40 front protection means it's fine in a dry indoor panel; keep it out of washdown areas.