Sorry - can't help you. Your original part number is not a valid one for rectifiers; it cross-references to a crystal oscillator.I think it is about 200V / 40A , but its imposssible in to220 normal case!
yes it's for free-wheel. and regenerate too.
with 300A of current in max braking ,there are 12 diodes (and no place for more), it need 25A minimum...each