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What is the largest branch breaker available in the 400A NQ panel in a NEMA 3R enclosure?

What is the maximum amp of a branch breaker that can be installed in a 400A NQ panel in a weatherproof enclosure?

Product Line:
NQ Circuit Breaker panels sold and supported in the USA. 


Product Features

Due to heat rise restrictions inside the NEMA 3R enclosure, the maximum branch breaker is a 150A/3P QOB-VH branch.  A 150A sub feed breaker is the largest
subfeed branch that can be utilized.
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