Siemens SENTRON 3VA2125-7JQ32-0AA0 — 25 A MCCB, line protection, communication-ready
The Siemens SENTRON 3VA2125-7JQ32-0AA0 is a 3-pole molded case circuit breaker rated 25 A continuous, designed for line protection in distribution panels. Its interrupting capacity reaches 330 kA at 240 V, 242 kA at 415 V, and 187 kA at 500 V, dropping to 3.7 kA at 690 V — which means it handles high-fault utility feeds at typical low-voltage levels but is not intended for 690 V distribution. The 25 A rating holds flat from 40 °C through 70 °C (–), so no derating is needed in warm enclosures. A communication function allows integration with building management or power monitoring systems.
Mounting & panel fit — 105 mm wide, 86 mm deep, 181 mm tall
The 3VA2125-7JQ32-0AA0 measures 105 mm wide, 86 mm deep, and 181 mm tall. It mounts on a DIN rail or panel-mount plate inside a standard distribution enclosure. The 3-pole footprint matches typical SENTRON 3VA series cutouts — no surprises for panel builders already working with that family.
Electrical ratings — what the numbers mean for your BOM
Rated continuous current is 25 A with a full-scale setting of 25 A — the breaker is fixed at that value, not adjustable. The minimum operating current is 38 A and maximum 300 A. Rated insulation voltage is 800 V. Power loss is 0.6 W maximum.