The VW3A68402 is a Schneider Electric EMC input filter from the Altivar range, built as a radio interference input filter for three-phase drives. It carries a 300 A rated current at 400-500 V — that's the continuous current the filter can pass without saturating the common-mode choke, sized for the line side of a large Altivar drive. The 40 W thermal losses mean it dissipates that heat into the panel; plan for airflow or spacing around it.
Dimensions are 204 mm wide, 295 mm tall, 89 mm deep. That 89 mm depth is the body depth from the mounting surface to the rear — check your enclosure depth before sliding it in, especially if you have a shallow back panel or a gland plate behind it. The 204 mm width and 295 mm height dictate the footprint on the DIN rail or backplate.
Leakage and grounding
Maximum earth leakage current is 100 mA at 400 V 50 Hz for both TN and TT systems. That's the leakage the filter's Y-capacitors will dump to ground — it's high enough that you need a proper earth bond and may trip a standard 30 mA RCD. Plan for a dedicated protective earth conductor sized for that leakage, and consider a time-delay or selective RCD if you must have ground-fault protection downstream.