When was the LH4N soft start line made obsolete?

Issue:
Customer wants to know when the LH4N soft starts became obsolete

Product line:
LH4, LH4N

Environment:
All models

Cause:
Obsolete

Resolution:
The LH4N became obsolete in January 2005.  The current replacement product for form, fit and function is the ATS01 soft start series.  Customers should still review the product ratings and dimensions before ordering. 
The Installation Manuals for the LH4N and the ATS01 are attached.