Siemens SENTRON 3VA2325-6HL32-0BA0 — 250 A MCCB with ETU320 Trip Unit
The Siemens SENTRON 3VA2325-6HL32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 250 A at 40 °C and holding that rating through 50 °C before a gentle derating curve begins — 240 A at 55 °C, 235 A at 60 °C, 230 A at 65 °C, and 225 A at 70 °C. That thermal profile means it can sit in a warm panel without losing capacity until ambient pushes past 50 °C, which covers most standard industrial enclosures. Breaking capacity is the headline number that decides fault-clearing fit: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. At 415 V — common for European industrial distribution — the 187 kA rating gives substantial headroom above typical 50 kA or 65 kA available fault current, so it coordinates well downstream of a transformer or upstream of a switchboard without needing a current-limiting fuse. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves. Rated insulation voltage is 800 V, so the breaker is electrically rated for 690 V systems with margin. Maximum power loss is 40 W — a figure to check against enclosure thermal dissipation when the breaker is fully loaded.
Lifecycle and Sourcing — Active Production, Quoted to Order
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. The ETU320 release and undervoltage release are standard fit on this variant, so no separate ordering of the trip unit is needed.
Panel Integration — Dimensions and Mounting
Mounting dimensions: 248 mm height, 138 mm width, 110 mm depth. The 138 mm width for a 3-pole frame is standard for SENTRON 3VA2 breakers in this rating class, so it fits existing cutouts and busbar spacing in a distribution board or motor control center. Depth of 110 mm is shallow enough for most 400 mm deep enclosures with clearance for rear cable connections.
Undervoltage Release and Auxiliary Options
Fitted with an undervoltage release (UVR) as the auxiliary release type. This trips the breaker when control voltage drops below a threshold, which is standard for safety circuits that need to drop power on loss of control supply. No auxiliary contact version is included, and no communication function or phase failure detection is built in. The basic switch variant is 3VA2325-6HL32-0AA0, and the integrated auxiliary trip is 3VA9608-0BB11 — these are the factory-assembled components inside the breaker.