Siemens SENTRON 3VA1050-4ED32-0BH0 — 50 A MCCB, 3-Pole, High Interrupting Capacity
Its interrupting capacity hits 121 kA at 240 VAC, dropping to 75.6 kA at 415 VAC and 52.5 kA at 440 VAC — numbers that tell you this breaker is built for high-fault panels where upstream coordination demands a stiff SCCR. At 690 VAC it still clears 11.9 kA, so it handles 480Y/277 V systems with headroom.
Built-in Undervoltage Release and Auxiliary Switching
It also carries 2 auxiliary switches plus a separate trip alarm switch (HQ), giving you status feedback for PLC or SCADA without adding external relays. The 70 mm depth and 76.2 mm width fit the standard SENTRON 3VA mounting footprint — same panel cutout as the 3VA1 frame. No communication module on this unit; it's a standalone thermal-magnetic breaker with a mechanical trip indicator for local fault indication.
Environmental and Compliance Range
Rated insulation voltage is 800 V, with an operating temperature span of -25 °C to 70 °C and storage from -40 °C to 80 °C.