The 500-DOD920 Contactor by Allen-Bradley/Rockwell Automation is a NEMA AC Contactor that is manufactured as part of the Bulletin 500 Contactors series. These contactors come in different NEMA sizes from 0 to 4 for the open enclosure type, top-wired contactors. Related devices like members of the Bulletin 500F series feed-through contactors and the Bulletin 509 series full voltage starters come as modular kits which promote quick delivery and quick installation. There are devices with different enclosure types as well as different NEMA sizes. The Allen-Bradley 500-DOD920 NEMA AC Contactor has a NEMA size of 3 with no enclosure. It operates on a nominal coil voltage rating of 110 Volts at 50 Hertz frequency and on 120 Volts at 60 Hertz frequency. The device has 2 power poles and it comes with 1 Normally Open (NO) auxiliary contact. This unit has no options for surge suppressors for coils rated at 120/240 Volts, and no option for a Normally Closed (NC) auxiliary contact.

The Allen-Bradley 500-DOD920 NEMA AC Contactor can be ordered either as individual components, and as a whole modular kit. The modular kit consists of a base contactor, a load side terminal shield for protecting the contactor, and a selectable number of power poles, optional coil voltage ratings, and other custom features for specific applications. This contactor and other members of the Bulletin 500 Contactors series are certified for compliance with the UL, CSA, ABS, IEEE, and CE standards. There are also contactors from this series with NEMA sizes of 00, 5, 6, 7, 8, and 9 which are only available as factory-assembled devices. The Allen-Bradley 500-DOD920 NEMA Size 3 AC Contactor comes with a top wiring kit and a top wired contactor coil with a voltage rating of 120 Volts AC in addition to its Normally Open (NO) auxiliary contact.