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Looking for an XTA291427 overload relay

In this case, XTA291427 is the same as catalog number XTOB100GC1S

The XTA numbers are the original style numbers associated with the XTOB IEC overload relays.  Search for the XTA number in the style field in Vista to find the current catalog number.  Now, the style number is MSAA followed by the 6 digit article number, in this case 278470.