Siemens 3VA2225-7KP32-0HH0 — SENTRON MCCB for Line Protection
The Siemens 3VA2225-7KP32-0HH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in industrial power distribution. It carries a rated continuous current of 250 A at 40 °C and holds that rating through 50 °C, then derates linearly to 200 A at 70 °C — the thermal curve matters if your panel runs hot or you're pushing the bus toward the upper ambient. The adjustable thermal-magnetic trip unit covers 375 A to 2500 A, so you set the actual protection point in the field, not at the factory. Interrupting capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V. That's a high-fault rated device — it stays coordinated upstream when the available fault current is high, which is typical for main or feeder breakers in large switchboards. The 3-pole construction is standard for three-phase line protection.
Built-in Indication and Auxiliary Hardware
The breaker ships with a trip indicator, a voltage trigger, and a communication function plus an additional measurement function. The auxiliary switch complement is two auxiliary switches plus one trip alarm switch HQ, and a shunt trip (STL) release is integrated — no separate add-on module needed for remote tripping. That means the panel builder can wire the STL into an emergency-stop chain or a PLC-driven shutdown circuit without drilling into the breaker cover. Physical footprint: 181 mm high, 105 mm wide, 86 mm deep. That 105 mm width per 3-pole MCCB is standard for the SENTRON 3VA frame size — it fits the same mounting hole pattern as other breakers in the series, so a panel already laid out for a 3VA22 frame accepts this unit without re-drilling.
Environmental and Power Handling
Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. Maximum power loss at rated current is 48 W — that's the heat the breaker dumps into the enclosure, so factor it into your panel thermal calculation if you're stacking multiple breakers in a sealed box. No undervoltage release and no ground-fault monitoring on this variant; those functions would need a different order code or an external module.