The Klein auxiliary relay K/KC 6 fulfills the relay function and represents a series with very compact dimensions as well as connection options in screw, solder pin, and flat plug technology. The 4-pole devices offer a wide range of applications, even in unfavorable space conditions. With their AC or DC control, they switch control circuits or load circuits up to 4 A (230 V). Mountable accessories include extinguishing elements and 2-pole auxiliary switches that can be attached laterally or from the front.