Siemens 3VA1332-5EF32-0AA0 — 320 A SENTRON MCCB for Line Protection
The interrupting ratings are what set this frame apart: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V. The 320 A rating holds steady from 40 °C through 50 °C ambient, then derates linearly to 292 A at 70 °C. For a panel running warm near a transformer or in a non-climate-controlled room, that derating curve lets you size without overspending on a larger frame.
Panel Fit & Integration — 138 mm Wide, 3-Pole Frame
The 3VA1332-5EF32-0AA0 occupies a 138 mm wide, 248 mm tall, 110 mm deep footprint — a standard 3-pole MCCB envelope that fits most distribution panelboards and switchboard cubicles. No communication module, no voltage trigger, no trip indicator: this is a clean, manually operated line-protection breaker with a rotary handle. Maximum power loss of 80.1 W at full load — factor that into panel ventilation if the enclosure is tightly packed.