What it is and what it does
The Siemens 3VA2225-6HL32-0BC0 is a SENTRON molded case circuit breaker (MCCB) for line protection. It is a 3-pole unit rated for 250 A continuous current, with a maximum breaking capacity of 2,500 A and a minimum of 375 A. The real SCCR story is voltage-dependent: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. That 242 kA at 240 V means it can safely interrupt a fault current up to that level without the arc flashing over or the case rupturing — critical for high-capacity transformer secondaries or busway feeds. Thermal derating is published across the operating range: it holds 250 A flat from 40 °C through 50 °C, then steps down to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs hot, that curve tells you exactly where you lose headroom — no guessing.
Built-in auxiliary and undervoltage release
This variant ships with an undervoltage release (UVR) and two auxiliary switches (HQ design) factory-integrated. The UVR trips the breaker when control voltage drops below a threshold — standard for safety circuits where a loss of control power must open the main feeder. The two aux switches give you status feedback (open/closed) for PLC inputs or remote indication without adding external contact blocks. No ground-fault monitoring, no communication module, no voltage-trip or shunt-trip on this order code. It's a straightforward line-protection MCCB with undervoltage release — sized for the panel builder who needs the UVR and aux contacts out of the box, not as field-add kits.
Physical fit and panel integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — it fits the same mounting holes and bus-bar spacing as other 3VA2 breakers in the same current class. The 86 mm depth includes the case body; allow extra behind the panel for the rear terminals and arc-chamber venting. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limits govern handling and warehousing, not running — the breaker can sit in a cold warehouse at -40 °C and still commission fine once warmed to operating ambient. Maximum power loss at rated current is 50.5 W. That's the heat the breaker dumps into the enclosure at full load — factor it into your panel thermal calculation, especially if the MCCB is enclosed in a small non-ventilated box.