Which contactor is better - IEC, NEMA or Definite Purpose?
Which contactor is better - IEC, NEMA or Definite Purpose? Summary: The choice of contactor type depends most on who is making the decision, and what they value the most. NEMA = ROBUST, Definite Purpose = "budget friendly", and IEC = versatile. There are reasons for three different types of contactors, and there are reasons one makes more sense than the other... depending on who you ask. What makes each type unique? NEMA - This type is the "tank" of the contactor world. It is big, has large contacts that makes it capable of handling even severe applications. NEMA devices are also easy to maintain - repair it and put it back into service. I used to work in tech support for a market leader of NEMA motor control, and it was not unusual to hear of NEMA units operating for 40 years. Definite Purpose - As the name implies, this type has an intended use, and performs in that use well. It has an attractive price point, but don't expect too much more of it though. D...