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What is the difference is between a EHB breaker and a EDB breaker?

Can an EDB breaker replace an EHB breaker?  Can the EHB breaker be installed in an NF panel or the EDB be installed in the NEHB panel?

Product Line:
Breakers for NEHB and NF panelboards

This applies to all EHB and EDB, EGB, EJB breakers

The EHB is used in NEHB panels and the EDB is used in NF panels.
The EHB breaker is 1" wide by 4.03" long and the EDB breaker is 1" wide and 5.625" long.
The EHB breaker is obsolete with no replacement.  
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