Plug-In Relays SE Relays Plug-In Relays & Latching Relays include the 700 series ice cube relays, offering a wide range of contact configurations, contact ratings (3A to 20A) and cover options. Also included is the SE Relays 788 series Plug-In Relays which can handle loads up to 16A and offers a variety of mounting options. SE Relays energy-saving magnetic latching relays require no power to maintain contact closure. They include: the 755 series with an octal base, the 785 series with a square base and the 303 series using 0.25' quick-connect terminals. With a single keystroke, engineers can download 3D CAD models by simply selecting the part number to view the detail page and then selecting the 3D CAD model from the Documents tab.