Siemens 3VA1040-2ED32-0KC0 — 40 A SENTRON MCCB with Shunt Trip
Its breaking capacity hits 52.5 kA at 240 VAC and 32 kA at 415 VAC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream.
The 52.5 kA interrupting rating at 240 VAC drops to 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 500 V and 690 V. That means on a 400 V class system the breaker clears 32 kA symmetrical fault current — sufficient for most industrial service entrances and panelboard mains. The continuous current rating holds at 40 A from 40 °C through 50 °C ambient, then derates to 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C.
Panel Fit and Auxiliary Configuration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a 3-pole MCCB footprint that fits standard Siemens SENTRON distribution panels and switchboard chassis. The two HQ auxiliary switches (form C) provide position-indication contacts for remote monitoring or PLC inputs. The shunt trip release lets a safety relay or emergency-stop circuit drop the breaker without a manual handle operation. No undervoltage release is fitted, so the breaker stays closed through a control-power loss unless the shunt trip is explicitly triggered.