The 100-E40KD400 contactor is a 4-pole contactor from the Allen-Bradley/Rockwell Automation IEC 100 Contactors series. This 4-pole contactor can use AC voltage and DC voltage and it is a direct-on-line contactor which has 4 poles or main contacts that are all NO or normally open contacts. The 100-E40KD400 contactor does not have any NC or normally closed main contacts and it does not have auxiliary contacts unless it is connected to an optional auxiliary contact block. This 4-pole contactor can sustain a current rating of 60 Amps at a voltage rating of 600 Volts and an ambient temperature of 40 degrees Celsius and a current rating of 70 Amps at a voltage rating of 690 Volts and an ambient temperature of 40 degrees Celsius.

The coil voltage rating for the Allen-Bradley/Rockwell Automation 100-E40KD400 4-pole contactor from the IEC 100 Contactors series is from 100 to 250 Volts AC/DC. Some applications require 2 contactors to be interlocked with each other while operating, and the 100-E40KD400 contactor supports interlocked operation with compatible IEC 100 series contactors that it connects to with an interlocking mechanism. The compatible interlocking mechanism for this contactor is strictly mechanical, with 2 fixing clips but no auxiliary contacts or support for electronic connections. Terminal shrouds are another type of available optional accessory for the 100-E40KD400 4-pole contactor, and they provide an IP 20 level of protection against direct contact after the contactor terminals have been wired. This contactor can also be used with Wye-Delta power wiring kits in Allen-Bradley Wye-Delta systems and applications.