What this MCCB carries and where it fits
The Siemens 3VA1110-6EF32-0HA0 is a 3-pole SENTRON molded case circuit breaker rated for 100 A continuous current (Iu) with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — numbers that put it squarely in high-fault-duty distribution, not branch-circuit light stuff. The shunt trip (STL) auxiliary release (order code 3VA9688-0BL30) lets you remote-trip it from a safety circuit or E-stop string, which is the usual reason someone specs this variant over a plain thermal-magnetic.
Breaking capacity — what the numbers mean for coordination
The 220 kA at 240 V is the headline figure, but the 154 kA at 415 V is the one that governs most industrial panels on 400 V class supplies. That level of SCCR means this breaker can sit upstream of a sub-distribution board without needing a current-limiting fuse ahead of it — it clears a fault before the let-through energy damages downstream gear. At 690 V the rating drops to 17 kA, so if you're on a 690 V mining or marine system, check the available fault current before committing.
Thermal derating — the real ampacity
The breaker holds 100 A from 40 °C through 50 °C ambient — no derating needed in a typical ventilated panel. At 55 °C it steps to 96 A, at 60 °C to 94 A, and at 65 °C to 92 A, bottoming at 90 A at 70 °C. If the panel is in a hot corner (near a furnace line or unvented roof), that 90 A floor is the number to size the load against, not the nameplate 100 A.
Panel fit and mounting
The case measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard SENTRON 3VA1 footprint that drops into the existing mounting base without panel rework. Front IP40 protection keeps dust out of the terminal area in a clean enclosure; no washdown rating, so keep it behind a gland plate. No auxiliary contacts are fitted as-delivered, so if you need a status feedback signal for the PLC, you'll add them separately.