What it is and what it does
The Siemens SENTRON 3VA2025-8HN46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 25 A continuous current at 40 °C through 70 °C ambient — no derating needed across that span. It carries the ETU350 electronic trip unit, designed for line protection in distribution panels. Breaking capacity is 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V — figures that put it in the high-interrupting category for industrial mains distribution. Rated insulation voltage is 800 V.
Physical fit and panel integration
Dimensions are 86 mm deep, 140 mm wide, 181 mm high. The 4-pole footprint matches standard MCCB mounting in SENTRON distribution boards and third-party enclosures. Front face carries IP40 protection — suitable for dry indoor panel environments, not washdown zones.