What it is and what the ratings mean
The Siemens 3VA2325-6HN32-0AG0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It is a 3-pole unit rated for 250 A continuous current across the full ambient range from 40 °C up to 70 °C, meaning it carries the same 250 A without derating in a warm enclosure — a useful simplification for panel builders who want one ampacity number for the entire operating window. The interrupting ratings are substantial: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. That 242 kA at 240 V tells you this breaker is sized for high-fault-current service-entrance or large sub-distribution positions where available fault current is high — not a branch breaker for a small motor panel. Maximum rated current is 3 000 A, and the minimum is also 3 000 A — this is a fixed-rating frame, not an adjustable one. The breaker ships with a 250 A continuous rating, but the frame itself is the 3 000 A platform, which gives mechanical headroom for the high interrupting duty.
Physical fit and panel integration
Dimensions are 248 mm high, 138 mm wide, and 110 mm deep. The 110 mm depth is a key number for enclosure selection — it tells you the breaker projects 110 mm from the mounting surface, which determines the minimum enclosure depth needed to clear the door or deadfront. The breaker includes a trip indicator and is equipped with one auxiliary switch plus one trip alarm switch (HP design). There is no undervoltage release and no ground-fault monitoring version on this variant. The auxiliary switch arrangement is factory-configured as 1 auxiliary + 1 trip alarm, which covers the common signaling needs for a line-side breaker — remote trip indication and breaker status.
Lifecycle and sourcing posture
Maximum power loss is 37.5 W — a figure to factor into enclosure thermal calculations if the breaker is in a sealed, uncooled panel with other heat sources.