The 100-E38EQ400 direct-on-line contactors from Allen-Bradley/Rockwell Automation is part of the Allen-Bradley IEC 100 Contactors series. It has no built-in auxiliary contacts, but its 4 main poles are all normally open main contacts. At 600 Volts of rated voltage with UL general-use motors that have protective enclosures, the 100-E38EQ400 direct-on-line contactor operates at 55 Amps of current. At 690 Volts of rated voltage with AC-1 motors, the 100-E38EQ400 contactor operates at 55 Amps of current. This AC and DC direct-on-line contactor is designed to be efficient and environmentally-friendly with a low level of power consumption during operation. It supports coils with coil voltage ratings of 12 Volts DC to 24 Volts DC. The 100-E38EQ400 direct-on-line contactor is a compact contactor, but it can be connected to different optional accessories that will change its dimensions.

The Allen-Bradley/Rockwell Automation 100-E38EQ400 direct-on-line contactor from the IEC 100 Contactors series can connect to auxiliary contact blocks if it needs auxiliary contacts for a specific application. Additionally, the 100-E38EQ400 direct-on-line contactor can be connected to another compatible contactor with a device known as a mechanical interlock if an application requires it. The mechanical interlock comes with 2 fixing clips but no auxiliary contacts. Another type of interlock which is both mechanical and electrical can be used to connect the 100-E38EQ400 direct-on-line contactor to another contactor. The mechanical and electrical interlock comes with 2 fixing clips, a mechanical interlock mechanism, and an electrical interlock block that supports A2-A2 connections. The 100-E38EQ400 direct-on-line contactor can use Wye-Delta power wiring kits with Line, Star, and Delta contactor connections.