The ABB catalog number CR420KA2 refers to a plug-in relay socket designed for 8-pin configurations. This Type K socket supports double-pole double-throw (DPDT) relays, making it a reliable component for various control and automation setups. Distributed by BSP Automation, this relay socket is a solid choice when you need a straightforward, durable connection point for your relays. It’s sometimes known by the number 783166604434, but no matter what you call it, this socket delivers consistent performance in demanding industrial environments.