CA14NV12,5-10KA2020 is a part of an Automatic Circuit Protector (ACP). This device is designed to provide overcurrent protection in a control or auxiliary circuit, with an instantaneous tripping mechanism that is activated as soon as the current passes the predetermined trip level. The part has an Amperage rating of 12.5-10kA and a voltage rating of CA14NV. This particular ACP part is rated up to 20A and is designed for AC voltage up to 480V.