A rugged body design makes these control relays better for heavy-duty industrial and machine applications, such as starters, than general-use relays. They have an electromechanical design, which means they operate on a combination of electromagnetic field and mechanical contacts, and can be modified to include accessories such as poles, contacts, and timers.
Made to IEC dimensional standards, these control relays generally fit in smaller spaces than NEMA control relays. They mount onto DIN rails or directly to a surface with screws.
DIN Rail, Panel Mounting
Larger and more rugged than IEC relays, these control relays are made to NEMA specifications.