What this MCCB delivers in the panel
The Siemens 3VM1110-4ED12-0AA0 is a 1-pole SENTRON molded case circuit breaker rated for line protection duty. It carries 100 A continuously from 40 °C through 50 °C without derating — at 55 °C it still holds 98 A, and at 70 °C it delivers 91 A. That thermal curve matters if this breaker sits in a crowded enclosure or near a heat source. The interrupting capacity hits 76 kA at 240 V AC and 9 kA at 415 V AC. The 76 kA figure at 240 V is high — it handles faults on strong utility feeds or transformer-secondaries without needing an upstream current-limiting fuse. The 9 kA at 415 V covers standard European distribution panels. It uses a TM210 thermal-magnetic overcurrent release with adjustable short-circuit pickup up to 1 000 A. The release type LI (long-time and instantaneous) means no electronic trip unit — simpler, more robust in dirty power environments, and easier for a field tech to troubleshoot.
DIN-rail fit and panel integration
The 25.4 mm width (1 inch) is a single pole pitch — standard for 1-pole MCCBs on a DIN rail. The 70 mm depth and 130 mm height mean it fits a standard distribution board without overhang. IP40 on the front is fine for indoor panelboards; not rated for washdown.
What the switching capacity class S means
The switching capacity class S is the standard-performance tier in the SENTRON 3VM range.