Siemens SENTRON 3VA1150-3EF36-0BH0 — 50 A MCCB for Line Protection
Breaking capacity is specified per voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That covers most industrial service entrances and downstream feeder panels; the 690 V figure matters for 600 V class installations where fault current can exceed 10 kA. Rated insulation voltage is 800 V, so the breaker is suitable for 480/277 V and 600/347 V systems with headroom. Power loss at rated load is 17.1 W maximum — account for that in a sealed, non-ventilated enclosure when stacking multiple breakers.
Built-in Undervoltage Release and Auxiliary Switch Configuration
The 76.2 mm width (3 inches) is the standard 3-pole MCCB envelope for this class — it fits existing SENTRON 3VA panel cutouts and busbar risers without adapter plates.
Operating Environment and Lifecycle
The trip indicator is present, so a visual flag confirms the breaker tripped on fault versus being manually switched off.