The Siemens 3VA2140-5MN32-0JL0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection, with a 40 A rating maintained across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to the enclosure's thermal limit. Rated 187 kA at 240 V and 121 kA at 415/440 V, it handles high available fault currents common in industrial distribution panels without cascading upstream. At 500 V the breaking capacity is 75.6 kA; at 690 V it drops to 3.7 kA — a normal curve for a 40 A frame, but worth noting if the line side runs at 690 V. The 3-pole unit includes phase failure detection and a shunt trip release (STL) for remote tripping via a control signal. Auxiliary configuration is two auxiliary switches plus one trip alarm and one electrical alarm switch (HQ) — enough for status feedback to a PLC or annunciator panel.
Integration & Fit
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA molded-case footprint that mounts in most panelboard and enclosure cutouts without modification. The 86 mm depth leaves clearance for rear-access wiring in shallow backpanels. The base switch is order code 3VA21405MN320AA0, meaning the breaker core is a fixed unit — not a plug-in or draw-out variant. Field-installable accessories are limited to the provided shunt trip and auxiliary switch block; no communication module or ground-fault module is fitted.
Ratings & Protection
Maximum power loss is 1.6 W at rated current, which keeps enclosure heating minimal. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.