What is the largest size incoming conductor for the standard solid neutral on a NQ442L4C panel?

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Issue:
Neutral lug size

Product Line:
Panelboards

Environment:
NQ Panelboards

Cause:
Wire selection

Resolution:
The standard 400 A solid neutral aluminum mechanical lug can handle (1) 1/0-750 kcmil, or (2) 1/0-350 kcmil incoming conductors. Its is part # 80122-137-50. The 200% rated solid neutral comes with two terminals with this same rating per each.