SENTRON 3VA2040-8HM42-0AA0 — 4-pole MCCB with ETU330 trip unit
The Siemens SENTRON 3VA2040-8HM42-0AA0 is a 4-pole molded case circuit breaker rated for 40 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed in typical enclosed panel conditions. Breaking capacity reaches 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 53 kA at 690 V, covering high-fault installations. The ETU330 electronic trip unit provides adjustable long-time delay (tr) from 0.5 s to 17 s and N-conductor protection configurable to OFF or 100%. Ground fault monitoring uses summation current formation on L+N.
Mounting and panel fit
Dimensions are 86 mm deep × 140 mm wide × 181 mm high — standard 4-pole MCCB footprint for DIN-rail or screw-mount panel installation. IP40 front protection means it is intended for enclosed distribution boards, not open washdown areas.