What it is and what it does
The Siemens SENTRON 3VA2225-7JQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed for line protection in distribution panels. It carries a breaking capacity of 330 kA at 240 V and 242 kA at 415 V, which means it can safely interrupt fault currents at those levels without upstream cascading — critical for high-fault installations like transformer secondaries or large motor control centers. The insulation voltage is rated 800 V, so it suits 480/277 V and 600 V systems within the voltage class. This breaker includes ground-fault monitoring via summation current formation on the L-conductor, and it supports communication functions, allowing integration into a plant-wide power monitoring scheme. The 3VA2 platform is Siemens' current-generation SENTRON MCCB family, replacing the earlier 3VL series.
Thermal derating and real-world current
The continuous current rating holds at 250 A from 40 °C through 50 °C ambient. At 55 °C it derates to 238 A, at 60 °C to 225 A, at 65 °C to 213 A, and at 70 °C to 200 A. For a panel builder or MRO planner: if this breaker sits in a non-air-conditioned enclosure near other heat sources, the 55 °C derating figure is the one to size against — not the 250 A nameplate. The operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Breaking capacity across voltage levels
The interrupting ratings are: 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. The steep drop at 690 V is typical for MCCBs with this frame size — the arc extinction limits the high-voltage fault handling. For a 480 V system (common in North America), the 242 kA rating at 440 V is the closest published figure; the actual 480 V value would fall between the 440 V and 500 V numbers. For a 690 V system, the 4.5 kA rating means this breaker is not the primary fault-interrupting device at that voltage — upstream fuses or a higher-rated MCCB would be needed.
Lifecycle and sourcing posture
The lifecycle stage is listed as current — this is an active-production part in Siemens' SENTRON catalog. No end-of-life notice or last-time-buy window is associated with this order code. For BOM freeze or PCN watch: the 3VA2 series is the current standard; no successor has been announced. This part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time against an RFQ.
Physical fit and panel integration
Dimensions are 181 mm height, 105 mm width, and 86 mm depth. The 105 mm width is the standard 3-pole MCCB footprint for this frame size — it occupies three 35 mm DIN-rail modules (at roughly 35 mm per pole). The 86 mm depth includes the arc chamber and termination area; verify clearance behind the panel door for the breaker body and any accessory modules (shunt trip, auxiliary contacts).