Siemens 3VA2325-6HL32-0CC0 — 250 A MCCB with 242 kA interrupting rating
This SENTRON 3VA2325-6HL32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 250 A across the 40 °C to 50 °C band before derating begins at 55 °C. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves. Breaking capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V — enough to handle high-fault utility feeds and transformer secondaries without cascading upstream.
Breaking capacity and selectivity planning
The 242 kA at 240 V and 187 kA at 415 V mean this breaker can sit at the main incoming position in a panel fed by a large transformer — a typical 2000 kVA transformer at 415 V can deliver around 140 kA prospective fault current, so this unit clears that with headroom. At 690 V the 40 kA rating still covers most industrial 690 V distribution. For selectivity coordination downstream, the ETU320 supports I²t-on and I²t-off modes to tune short-time delay against downstream 3VA breakers.
Thermal derating and enclosure fit
Rated 250 A at 40 °C, 45 °C, and 50 °C without derating. At 55 °C it drops to 240 A, at 60 °C to 235 A, at 65 °C to 230 A, and at 70 °C to 225 A. If this breaker lives in a non-ventilated enclosure or a high-ambient switchroom, size the busbars and cable for the derated value at the actual enclosure internal temperature. The maximum power loss is 40 W — that heat must be managed inside the panel. Dimensions: 248 mm high, 138 mm wide, 110 mm deep. The 138 mm width occupies three standard 45 mm pole positions on a DIN rail or mounting plate.
Auxiliary and undervoltage release configuration
Factory-fitted with an undervoltage release (UVR) — design of the auxiliary release is undervoltage release type, so the breaker trips when control voltage drops below the dropout threshold. Two auxiliary switches HQ are included for status feedback to a PLC or DCS. The integrated auxiliary trip module is order code 3VA9608-0BB24. The base switch without auxiliaries is 3VA2325-6HL32-0AA0. No communication function, no phase failure detection, no ground fault monitoring — this is a plain line-protection breaker, not a power meter.