The DZ1008A is just a basic relay It was designed to plug into the end of an early version DZ1000 switch motor with the three prongs that stick out the end. It can be used in place of a relay in a number of different application It has Normally open and normally closed contacts that are perfect for a number of different signals and accessories, I find that you are better off using a relay with a higher current rating as these DZ1008 dont advertise what they are rated at and seem to burn out very easy