The Siemens 3VA2140-5KP36-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 40 A continuous current with an ETU850 electronic trip unit. It is a 3-pole, line-protection device with communication capability, designed for panelboard and distribution applications where adjustable trip curves and high interrupting capacity are required.
Interrupting capacity and selectivity
This MCCB delivers 187 kA interrupting capacity at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Those numbers tell you what fault levels this breaker can safely clear at each voltage — critical for coordination studies and ensuring the device upstream doesn't have to trip for a downstream fault. The 800 V rated insulation voltage gives headroom for 690 V systems.
ETU850 trip unit and thermal performance
The ETU850 electronic trip unit allows adjustable overload and short-circuit protection settings, which is what you need when coordinating multiple breakers in a distribution panel. The continuous current rating holds at 40 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that temperature, which simplifies panel layout in warm enclosures.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep. The 3-pole footprint matches standard SENTRON 3VA2 panel cutouts and busbar arrangements. Front protection is IP40, suitable for enclosed distribution boards where the front face is behind a door.
Communication and monitoring
This breaker includes a communication function and an other measurement function, which means it can report current, power, and energy data over the SENTRON communication bus — useful for energy monitoring and remote trip indication without adding external CTs or meters.