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Will A type thermal units or B type thermal units work in lieu of AR type thermal units?

Issue:
Will A type thermal units or B type thermal units work in lieu of  AR type thermal units?

Product Line:
NEMA Contactors and Starters

Environment:
US Products

Resolution:
No, these are not interchangeable. The AR thermal units are for use in a bimetallic overload relay where the A & B types are melting alloy style..
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