Bulletin 500F AC contactors (open type) are available in feed-through wiring construction from NEMA size 0…5. Line terminals are at the top of the device and load terminals at the bottom. You can use these contactors to switch AC motor loads where overload protection is not required or is provided separately. You can operate our contactors remotely using pilot devices, such as push buttons, selector switches, timers, relays, or temperature switches.