Siemens 3VA2140-7KP36-0AA0 — SENTRON 3VA2 MCCB, 40 A, ETU850
The Siemens 3VA2140-7KP36-0AA0 is a SENTRON 3VA2 series molded case circuit breaker (MCCB) rated for 40 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries an ETU850 electronic trip unit, configurable for line protection duty, and delivers a short-circuit breaking capacity of 330 kA at 240 V and 242 kA at 415 V. The 3-pole frame is sized at 105 mm wide by 181 mm tall by 86 mm deep, with IP40 protection on the front face for panel-mount applications.
What the ratings mean for panel fit and coordination
The 40 A rating is flat from 40 °C to 70 °C — per the datasheet, the breaker delivers its full 40 A at any ambient within that band. That simplifies panel thermal budgeting: no derating curve to apply for a 50 °C or 60 °C enclosure interior. The 330 kA at 240 V and 242 kA at 415 V place this MCCB in the high-interrupting category for 3VA2 frames; at 690 V the capacity drops to 3.7 kA, which still covers most industrial secondary-side faults. The 800 V rated insulation voltage (Ui) confirms suitability for 480 V and 600 V class systems with margin.
Integration notes — panel and communication
The 105 mm width fits standard 3-pole MCCB panel cutouts in the SENTRON 3VA2 family. The breaker includes a communication function (: Yes), which means it can interface with a bus system for remote monitoring and trip indication — no separate voltage trigger or undervoltage release on this variant. The IP40 front rating is typical for enclosed distribution panels; no washdown protection, so keep it behind a gland plate or enclosure door in wet environments.