The Telemecanique LA1DN11 is a contact block rated for 10 A thermal current (Ith) at 690 V insulation voltage (Ui), with a 1 NO + 1 NC contact configuration. It mounts as an auxiliary block on TeSys D contactors and similar DIN-rail control devices, adding signal or control contacts to the base unit.
The 10 A Ith rating covers both the NO and NC contacts under the same thermal limit, so the block can carry that current through either circuit path. The 690 V insulation voltage suits 400 VAC three-phase panels with margin for transients.