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Is there a 12VDC shunt trip available for the LA / LAL / LH / LHL / Q4 breaker?

There is not a 12VDC suffix code in the supplemental digest.  

Product line: 
Molded case circuit breakers 

LA LAL LH LHL Q4 Q4L circuit breakers Series 4 or newer

Yes but ONLY if the breaker is series 4 or newer.  Use suffix 1039 for factory-installed, or LA11039 for a field-installable kit.  
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