<prompt> In Cu 380A, 380 representsNumber of turns of copper wireSurface area of CuT in sq.mmSurface area of Cu in sq.mmEffective life of CuT in quaers  <response>: The numbers included in the names of the devices refer to the surface area in sq.mm of the copper on the device. Metallic copper has a strong anti-feility effect.Park 23e pg: 496 