What this MCCB carries and where it fits
The Siemens SENTRON 3VA1110-3EF32-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current (Iu) at 40 °C ambient, with a TM240 thermal-magnetic release that handles overload and short-circuit protection in one package. Its breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — numbers that tell you it's sized for high-fault industrial distribution panels, not light commercial subfeeds. The 70 mm depth and 76.2 mm width fit standard DIN-rail or panel-mount layouts, so it drops into most SENTRON or legacy 3VA cutouts without re-drilling the backplate.
Thermal derating and the TM240 release
The 100 A rating holds flat from 40 °C to 50 °C, then derates to 96 A at 55 °C, 94 A at 60 °C, 92 A at 65 °C, and 90 A at 70 °C. That's a gentle slope — you don't lose a full breaker size until you're past 65 °C inside the enclosure, which buys headroom for a tightly packed panel. The TM240 release means the thermal element is fixed (non-adjustable) at 100 A, and the magnetic trip is set to 240 A nominal — typical for motor branch circuits or general distribution where you want a clean coordination curve with downstream MCBs. No undervoltage release, no shunt trip, no ground-fault module on this variant; it's a straight line-protection breaker with two auxiliary switches HQ for status feedback to a PLC or annunciator.
Panel integration and wiring notes
Mounts on DIN rail or directly to a backplate via the 130 mm height and 76.2 mm width footprint. The 70 mm depth leaves clearance behind a standard 200 mm deep enclosure door. IP40 on the front means it's protected against tools and wires >1 mm — fine inside a locked panel, but not for washdown zones. The two auxiliary switches HQ are pre-wired to a terminal block; verify the NO/NC assignment against your PLC input card before powering up. No communication module or phase-failure detection on this order code, so if you need remote trip indication beyond the aux contacts, plan a separate monitoring relay.