Siemens 3VA2140-7HL46-0AA0 — 4-pole MCCB with ETU320 trip unit
The Siemens 3VA2140-7HL46-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in industrial power distribution. It is a 4-pole unit rated for 40 A continuous current. The electronic trip unit ETU320 provides adjustable overload and short-circuit protection, covering a current setting range from 60 A to 480 A. Breaking capacity is specified across multiple voltage levels: 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. These are the maximum short-circuit currents the breaker can safely interrupt at the respective voltages — critical for sizing upstream protection and ensuring coordination in high-fault panels. The breaker measures 86 mm deep, 140 mm wide, and 181 mm high. It mounts on a DIN rail or directly in a panel enclosure; the 4-pole width (140 mm) matches the standard SENTRON 4-pole footprint, so it slots into existing MCCB layouts without re-drilling gland plates.
Thermal performance and installation notes
Continuous current rating holds at 40 A across the full ambient temperature range from 40 °C to 70 °C (–). That means no derating is needed in warm enclosures — the breaker delivers its full 40 A even at 70 °C ambient. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Rated insulation voltage is 800 V. Front protection class is IP40 — suitable for general indoor panel use, not washdown environments. Power loss at rated current is 1.6 W maximum.