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What does an ``EX `` suffix mean on a XB4 push button catalog number ?

Issue:
What does an ``EX `` suffix mean on a XB4 push button catalog number ?

Product Line:
22mm Operators - GIC Product

Environment:
US Product

Cause:
Product Selection

Resolution:
This indicates a product that meets ATEX requirements for an explosive dust atmosphere per IEC Directives 99/92/EC and 94/9/EC . These are not commercialized or sold in the US .
 
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