Line protection MCCB with thermal-magnetic release
The part carries a rated insulation voltage of 800 V and delivers interrupting capacities of 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V, which covers most low-voltage distribution fault levels without cascading upstream.
Above 50 °C the continuous current must be derated: 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C. The enclosure depth is 70 mm, width 76.2 mm, height 130 mm — fits standard SENTRON panel cutouts. Front protection is IP40, adequate for enclosed distribution boards but not for washdown zones.
Auxiliary contacts and shunt trip provision
This version ships with 2 HQ auxiliary switches (form C) pre-installed, part of the integrated auxiliary trip assembly (order code 3VA9688-0BL30). The latching endurance is rated for 15 000 operations, which is the mechanical life before contact wear becomes a consideration for the auxiliary circuit.