The CL43B105KBFNNNE is a Samsung CL-Series 4-Channel SPDT Relay Module for industrial and networking applications. It features high-power switching ideal for industrial equipment control, telecommunications, and other applications. This relay module is designed with a 4-channel SPDT form factor, with each channel having a 5-amp (Resistive) maximum voltage and current rating. Its 6-pin connector offers a variety of connection options, while its terminals are clearly labeled for easy wiring. This module is UL, CSA, TUV, VDE, and CE approved.