Breaking capacity runs 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. The 3-pole form factor with 2 auxiliary switches HQ gives status feedback for PLC or HMI inputs without an add-on module.
Above that, derate linearly: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. For a panel running warm — say, adjacent to drives or transformers — size the load side for the actual enclosure temperature, not the nameplate 40 A. The 105 mm width and 181 mm height fit standard SENTRON mounting footprints; depth is 86 mm. Maximum power loss is 75 W, so account for that in the enclosure thermal budget.
Comparison with 3VA1110-5EE32-0DC0
The 3VA1110-5EE32-0DC0 is a smaller-frame SENTRON MCCB with a lower interrupting rating and a thermal-magnetic trip (no electronic adjustment). The 3VA2140-5MN32-0AC0 uses the ETU350M electronic trip, giving you adjustable long-time, short-time, and instantaneous pickup — critical for coordinating with downstream motor starters or for systems that need selective coordination studies. The 3VA1110 frame also lacks the phase failure detection that is standard on this motor protection variant. If the panel was originally specified around the 3VA1110, the 3VA2140 is physically larger (105 mm vs roughly 70 mm wide) and will not drop into the same mounting cutout without a new drill pattern or adapter plate.