For the mechanical operations lifetime of an IEC contactor, what is commonly expected?

• A. One million mechanical operations
• B. Ten million mechanical operations
• C. One hundred thousand mechanical operations
• D. Fifty million mechanical operations

Answer: (B)

Mechanical endurance is how many times the contactor’s mechanism can actuate (open and close) before wear affects its operation. For IEC contactors, a typical mechanical life is around ten million cycles, usually specified with no electrical load to isolate wear from arcing. This baseline—ten million cycles—is what you’ll commonly see on datasheets and is considered the standard expectation for ordinary devices. While some heavy-duty or specialized models may advertise higher numbers, one million or similar lower figures are not the norm for standard IEC contactors, and fifty million is less common in everyday products.