Finder 9902 series indicator emc suppression modules finder 9902300000 this finder 9902 series emc suppression and indicator module contains a free wheel flyback diode to protect relay driver circuits from negative going voltage spikes unlike other modules in this series it does not have an led indicator the module is designed to fit into a compatible socket together with the relay it protectsfits screw socket 9002 9003 9203 9402 9403 9404 9503 9505 9602 9604com