The ABB EHDB520C2P-1L2S is a 2-pole contactor rated at 520 A, classified under Contactors and Starters / Electrical Contactors.
What the 520 A rating means for your panel
The 520 A continuous rating governs the main power path through this contactor. For motor loads, that typically maps to AC-3 duty (switching motors under load) at a derated current — the exact AC-3 figure isn't listed here, but the 520 A frame size is the starting point for coordination with upstream circuit breakers and downstream overload relays.