The 104-E305ED22 contactor is a reversing contactor with 3 main contacts that has been designed by Allen-Bradley in the IEC 104 Contactors series. The 104-E305ED22 reversing contactor is part of the 104-E product line within the broader IEC 104 Contactors series, and the contactors from the 104-E product line are notable for their compact size and energy efficiency as well as for the environmentally friendly materials that they are made of. The 104-E305ED22 reversing contactor is made to be friendly to the environment both in its components and in its operation. This contactor and its components only require low levels of power to operate reliably and efficiently, and this contactor saves installation space on panels and DIN Rails because of its compact dimensions.

In addition to being flexible and suitable for several different kinds of applications on its own, the Allen-Bradley IEC 104 Contactors series 104-E305ED22 reversing contactor can be customized with accessories from the IEC 104 accessories catalog that allow it to meet the needs of very specific applications and to function as part of complex and extended industrial control systems. One of the types of accessories that the 104-E305ED22 reversing contactor is often used with is a mechanical interlock. This contactor uses the mechanical interlock to operate in the reversing mode with another contactor. When it is connected to a mechanical interlock, the dimensions of the 104-E305ED22 reversing contactor are 126 x 180 x 150 millimeters (excluding the dimensions of the other connected contactor.) The electronic coil voltage rating of this contactor is 100 to 250 Volts AC/DC (with an AC frequency of 50/60 Hertz.