MCCB for takt-time lines
Breaking capacity holds 187 kA at 415 V and 440 V, drops to 121 kA at 500 V, and 4.5 kA at 690 V — the 690 V rating is the limiting case for systems running above 480 V. For a 400 V distribution board, the 187 kA figure gives ample SCCR headroom for most industrial service entrances.
At 55 °C it derates to 241 A, at 60 °C to 232 A, at 65 °C to 222 A, and at 70 °C to 213 A — useful when the MCCB shares a tightly packed enclosure with other heat sources. Maximum power loss is 48 W at rated current. The 3-pole width of 105 mm is standard for this frame size — fits existing SENTRON 3VA panel cutouts and busbar arrangements without re-drilling.