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What does the suffix 1127 mean?

Need to know what accessory is designated by suffix 1127 on a molded case breaker.  

Product line:  
Molded case circuit breakers

Legacy breakers such as the FA, FAL, FH, FHL, KA, KAL, KH, KHL, LA, LAL, LH, LHL, MA, MAL, MH, MHL, PA, PAF, PH, PHF

A circuit breaker with a 1127 suffix has a 24Vdc undervoltage release (UVR) in the left pole.  Suffix 1107 would have the UVR in the right pole.
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