The Siemens 3VA2140-5MN32-0JH0 is a SENTRON 3VA2 series molded case circuit breaker (MCCB) rated for 40 A continuous current at 40 °C ambient, with a 3-pole configuration. It is designed specifically for motor protection, with phase failure detection built in. Its interrupting capacity at 415 V AC is 121 kA — that is the fault current it can safely clear without welding contacts or rupturing the case, which matters for high-fault installations like industrial substations or large motor control centers. The breaker carries a shunt trip release (STL) for remote tripping, plus two auxiliary switches and one trip alarm switch (HQ) — enough to signal status back to a PLC or annunciator panel.
Dimensions & Panel Fit
The 3VA2140-5MN32-0JH0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most SENTRON panelboards and switchgear cubicles without re-drilling the mounting plate.
Thermal & Environment
Rated current holds at 40 A across the full operating ambient range from -25 °C to 70 °C — no derating needed up to that ceiling. Storage range extends from -40 °C to 80 °C. Maximum power dissipation is 1.6 W, low enough that ventilation slots in a standard enclosure are sufficient; no forced cooling required.