Panasonic AEV14012 Contactor

As per Arber333:

Also from Volt pack you can salvage 2 powerfull contactors. P/N AEV14012 it is rated for 120A continuously and 400A for a short burst. This means they had to use one of theese on + line and another on - side. Together you get 240A rating for system with 800A for a burst of power. Contactor pulls 0.5A when active.

Mouser lists as obsolete with no replacement:
https://www.mouser.com/ProductDetail/Panasonic-Industrial-Devices/AEV31012?qs=%2Fha2pyFaduhQtRGmPu6CHKnpAO9pZACcsMnCfvY8GwI%3D