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How can I tell the difference between series numbers for 8539 Type SCW42?

 Issue:
Customer is trying to identify the series number on his enclosed Combination starter for assistance in selecting internal replacement parts

Product line:
8539SCW42

Environment:
n/a

Cause:
Series available are A to K

Resolution:
(obsolete) Series A thru H used the FAL circuit breaker and operating mechanism
(obsolete) Series I used the GJL circuit breaker and operating mechanism
(current) Series K uses the HLL circuit breaker and operating mechanism. This series was introduced in Nov 2010.

The product label is inside the enclosure on the right hand side should also indicate the series number.
 
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