The F10A-0102 is a terminal control relay (TCR) part manufactured by the French company Teledis. It is used for connecting electrical circuits, controlling switching, and providing an isolated contact between different parts of a circuit. It is made of a plastic or metal base to which a contact block is attached. The contact block consists of two sets of contacts that are separated by an insulation barrier. The contacts are made from different metals and can be either normally open or normally closed. The relay is designed to control a wide range of current from 1A to 100A at 250VAC and is rated for up to 4hp motors. The dimensions of the relay are 0.394" x 1.7" x 0.47" (10mm x 44mm x 12mm).