The Siemens SENTRON 3VA1110-4EF32-0KC0 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. Its breaking capacity hits 121 kA at 240 V AC, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that matter when you're coordinating downstream devices and need headroom for fault currents. The 800 V rated insulation voltage (Ui) covers most industrial panel voltages without derating concerns.
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 warm enclosure. At 55 °C it drops to 96 A, at 60 °C to 94 A, and at 70 °C to 90 A. That's a gentle slope; you can still push 90 A in a hot cabinet without tripping early. The TM240 release is a fixed thermal-magnetic type — no interchangeable trip units, so the breaker is factory-set for that 100 A frame. The 121 kA interrupting rating at 240 V is high enough to sit upstream of most branch panels without a current-limiting fuse ahead of it. At 415 V the 75.6 kA still covers typical utility fault levels in industrial distribution.
Panel fit and integration
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most DIN-rail or panel-mount enclosures without re-drilling. Front protection is IP40, so it's fine for a clean indoor panel but not for washdown areas. The auxiliary contact version comes with 2 HQ switches (changeover contacts) for status feedback to a PLC or annunciator. No undervoltage release, no shunt trip beyond the listed STL option — the integrated shunt trip (STL) is present, wired to the auxiliary release terminals.