What this MCCB is and what it does
The Siemens SENTRON 3VA2325-6HL32-0AH0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection — meaning it sits at the feeder or main distribution point in a panel, protecting downstream conductors and equipment against overloads and short circuits. Its continuous current rating holds at 250 A across the full ambient temperature range from 40 °C to 70 °C, so no derating curve is needed for warm enclosures up to that ceiling. Breaking capacity is the headline number that decides whether this breaker clears a fault without rupturing. At 240 V it interrupts 242 kA; at 415 V and 440 V it holds at 187 kA; at 500 V it drops to 121 kA; and at 690 V it is still rated for 7.5 kA. For a 250 A frame, those figures give substantial headroom over typical utility fault levels — the buyer should verify the available fault current at the point of installation against the voltage-specific rating.
Panel fit and auxiliary configuration
The breaker measures 248 mm high × 138 mm wide × 110 mm deep — a standard 3-pole MCCB footprint that fits most distribution panelboards and switchgear cubicles without requiring a sub-panel adapter. The supplied basic switch is order code 3VA2325-6HL32-0AA0, which is the thermal-magnetic trip unit base; this variant adds 2 auxiliary switches plus 1 trip alarm switch (HQ type), giving the control system both position feedback and a dedicated fault signal without an external relay. There is no undervoltage release, no ground-fault monitoring, and no communication function on this variant — it is a plain line-protection breaker with auxiliary contacts. If the application requires remote tripping or earth-leakage detection, a different 3VA variant or an add-on module would be needed.
Environmental limits and power loss
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss at rated current is 37.5 W — a figure to consider when calculating enclosure heat rise, especially in a multi-breaker panel.