What this MCCB delivers
The Siemens SENTRON 3VA1110-5EF36-0JC0 is a 3-pole molded case circuit breaker rated for a continuous current Iu of 100 A, with a TM240 thermal-magnetic overcurrent release. Its breaking capacity is 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — numbers that tell you it handles high-fault installations without cascading upstream. The rated insulation voltage Ui is 800 V, so it's comfortable in 480 V and 690 V distribution panels.
Thermal derating — the real-world current
The 100 A rating holds from 40 °C through 50 °C. At 55 °C it drops to 96 A, at 60 °C to 94 A, at 65 °C to 92 A, and at 70 °C to 90 A. If your panel ambient runs hot — say inside a sealed enclosure near a motor drive — use the 55 °C or 60 °C column for sizing. The TM240 release is a fixed thermal-magnetic unit, so no field adjustment on the thermal curve; the breaker trips on its factory-set characteristic.
Panel fit and auxiliary hardware
The breaker occupies 76.2 mm width (roughly 3 inches), 130 mm height, and 70 mm depth — a standard MCCB footprint that drops into most SENTRON distribution blocks. It ships with 2 auxiliary switches HQ (high-qualified) and a shunt trip release (STL) as the integrated auxiliary trip, order code 3VA9688-0BL32. The front face carries IP40 protection; the rest of the body is open to the enclosure environment. No undervoltage release, no ground-fault monitoring, no communication module on this variant — it's a line-protection-only unit.