Siemens 3VA1340-4EF42-0AA0 3VA1 4P 400A 36kA 415V TM240 LI Molded Case Circuit Breaker

The Siemens 3VA1340-4EF42-0AA0 is a four-pole molded case circuit breaker (MCCB) from the SENTRON 3VA1 series, rated 400 A with a breaking capacity of 36 kA (Icu) at 415 V AC (utilisation class S). It is equipped with the TM240 LI thermal-magnetic trip unit providing overload (L) and instantaneous short-circuit (I) protection. Rated for distribution and motor-feeder protection in low-voltage switchgear up to 690 V AC.

Technical Specifications

Certifications & Standards

• IEC 60947-2

Applications & Use Cases

At 400 A rated current and 36 kA breaking capacity, the 3VA1340-4EF42-0AA0 is dimensioned for feeder, sub-distribution and motor-circuit protection in low-voltage main and sub-distribution boards. The TM240 LI trip unit offers adjustable overload and short-circuit settings for selectivity coordination with upstream and downstream devices.

The IEC Frame 400 enclosure supports fixed mounting in form-separated switchgear (form 2–4) and accepts a range of Siemens 3VA accessories — auxiliary and alarm switches, shunt and undervoltage releases, rotary and motor operators — for adaptation to the specific installation and control scheme.