Yes page 6-47 includes the code for the part number.
Did you look at page 6-91?
The letter T, in position #8, indicates the breaker has Long time (e.g. thermal) tripping. There would be a letter I here, if this was a Motor Circuit Protector frame for magnetic only protection.
pg 6-47 also shows a note for the T code as LSI an industry std term for LongShortInstant