Siemens SENTRON 3VA2225-5HL42-0KC0 — 250 A MCCB with ETU320 Trip Unit
The Siemens 3VA2225-5HL42-0KC0 is a SENTRON molded case circuit breaker rated for 250 A continuous current across a 4-pole configuration, built around the ETU320 electronic trip unit for line protection. This is a current-production part. Breaking capacity scales with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V. That 187 kA figure at 240 V gives you serious fault-clearing headroom on low-voltage distribution — useful for high-fault utility feeds or transformer secondaries where available fault current runs high. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves, with a shunt trip (STL) release integrated for remote tripping. Two HQ auxiliary switches (form C) are included for status feedback to a PLC or annunciator panel — no separate aux kit to order.
Current Derating and Thermal Management
The 250 A rating holds flat from 40 °C through 50 °C ambient. Above that, derate linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Maximum power dissipation is 48 W — factor that into enclosure heat rise calculations, especially in a sealed panel with other heat sources. Operating ambient range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. The storage limit governs handling and warehousing, not running conditions.
Integration Notes — Panel Fit and Wiring
Dimensions are 140 mm wide × 181 mm high × 86 mm deep. The 140 mm width is standard for a 4-pole MCCB in this frame size — verify busbar or lug spacing against your existing panel layout before ordering, but it matches the SENTRON 3VA2 platform footprint. Rated insulation voltage (Ui) is 800 V, suitable for 690 V systems. ETU320 is self-powered from line-side current; shunt trip requires separate signal.