What this MCCB carries and where it fits
The Siemens SENTRON 3VA1140-5EF32-0JA0 is a 3-pole molded case circuit breaker rated for 40 A continuous current, built around a TM240 thermal-magnetic release. That 40 A holds flat from 40 °C through 50 °C (–); above that it derates to 38.4 A at 55 °C and 36 A at 70 °C. The interrupting capacity is the headline here — 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and still 17 kA at 690 V. That's high-rupture capability for a 40 A frame, sized for high-fault industrial panels where you need selectivity without stepping up to a bigger breaker. The shunt trip (STL) auxiliary release lets you trip remotely via a control signal — common in emergency-stop chains or PLC-driven disconnect sequences. Front protection is IP40, so it's panel-mount only; no washdown rating.
Panel fit and integration notes
The 3VA1140-5EF32-0JA0 occupies a 3-pole footprint at 76.2 mm wide, 130 mm tall, 70 mm deep. That width is standard for a 3-pole MCCB in this frame size — it lands on a DIN rail or mounts via the rear panel screws. The TM240 release is thermal-magnetic, so no external power supply needed for the overcurrent protection; the shunt trip (STL) does need a control voltage to fire. No auxiliary contacts are fitted, and there's no undervoltage release, no ground-fault module, no communication function. If you need those, you're looking at a different variant or an add-on accessory (the integrated auxiliary trip is order code 3VA9688-0BL32).
How the interrupting ratings govern your panel
The 187 kA at 240 V and 121 kA at 415 V are the numbers that decide whether this breaker coordinates with upstream gear. For a 480 V panel (common in North America), the 75.6 kA at 440 V is the closest published figure — expect similar or slightly lower at 480 V. At 690 V it still holds 17 kA, which covers most European industrial supplies. The rated insulation voltage is 800 V, so the breaker is rated for 690 V systems without derating the insulation path. The latching endurance is 15,000 operations — that's mechanical life, not electrical; for frequent switching, factor in contact wear.