The 507-2AH-F-S-24VDC part of Song Chuan is a double-pole single-throw (DPST) non-illuminated 10A relay. It has two normally open (NO) contact points that are connected when voltage is applied to the relay, and two normally closed (NC) contact points that are opened when voltage is applied. This relay operates on 24 VDC and is rated up to 10A at 28 VDC. It is encased in a slim, square package and can be used in a variety of applications.