The Siemens SENTRON 3VA2063-5HN36-0HC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, with an ETU350 electronic trip unit configured for line protection. Its 187 kA interrupting capacity at 240 V means it can safely clear a fault at that level without upstream devices needing to coordinate — a key spec for high-fault panels near large transformers or motor drives.
Breaking capacity across voltages
At 415 V and 440 V the breaker holds 121 kA, dropping to 79 kA at 500 V, and 3.4 kA at 690 V. For a mill environment with 480 V distribution, the 79 kA figure is the one that governs your SCCR study — plenty of headroom for most secondary substations.
Thermal derating and ambient tolerance
Rated full 63 A from 40 °C through 50 °C, then derates linearly: 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. The operating range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. That 70 °C ceiling means it takes the radiant heat near a furnace or drive cabinet without forced cooling — a real advantage on a hot-strip mill floor where ambient near the rolls melts ordinary gear.
Trip unit and auxiliary configuration
The ETU350 electronic trip unit provides adjustable long-time, short-time, and instantaneous protection — no phase failure detection, no ground fault monitoring, no communication function. It includes a shunt trip (STL) auxiliary release and 2 auxiliary switches (HQ version). The integrated auxiliary trip is order code 3VA9688-0BL30. No undervoltage release or voltage trigger is present; the voltage trigger option is listed as yes, meaning it can accept a shunt trip coil for remote tripping.
Physical fit and panel integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. Mounts on DIN rail or direct panel mount. The 86 mm depth is shallow enough for most standard enclosures; the 105 mm width is the standard 3-pole form factor for this SENTRON frame. Latching endurance is rated at 20,000 operations. Max power loss is 5.4 W.
Lifecycle and sourcing
Current production — no obsolescence notice. The part is sourced and quoted to order through independent distribution; availability and current pricing are confirmed at quote time. For volume or BOM-freeze inquiries, submit an RFQ.