The Allen-Bradley 100-E09KJ400 contactor is an MCS-E type of contactor from Allen-Bradley/Rockwell Automation. It is one of the next-generation contactors from the Allen-Bradley Bulletin 100-E series within the IEC 100 Contactors series. The 100-E series contactors have a compact design and they combine the simple function of the 100-C series with the sturdy performance that is required in industrial applications. This contactor variant has an AC3 utilization category and a 9 Amps current rating. The 100-E09KJ400 contactor has 4 poles and it features screw-type terminations, with an AC voltage rating of 24 to 60 Volts AC and a frequency range of 50 to 60 Hertz. Its DC operating voltage ranges from 20 to 60 Volts DC.

The 100-E09KJ400 contactor is equipped with AC and DC electronic coils with a wide voltage range, and an output power range from 55 to 630 kilowatts at 415 Volts AC. The electronic coils in the contactor are energy-saving coils with low power consumption ratings and they include an integrated surge suppressor. This Bulletin 100-E series contactor variant has 4 N.O. (Normally Open) main poles, and no auxiliary contacts. The contactor can be ordered with an electrical interlock accessory that can be used to interlock 2 built-in normally closed contacts with the contactor's 2 coils. A standard 100-E09KJ400 contactor without any auxiliary contacts has approximate dimensions of 80 millimeters in height, 45 millimeters in width, and 77 millimeters in depth. This Bulletin 100 contactor is an eco-friendly product with a small size that meets a wide range of health, safety, and environmental protection standards such as the EN/EIC, CE Marked, UL, RINA, EAC, CCC, and SUVA standards.