NF22E-12 is a control relay designed for railway application environments, featuring 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts in the first stack configuration. This device is part of ABB's TNL series control relays, which comply with national and international railway standards and employ ring-tongue termination for improved reliability and durability in rolling stock applications. The relay is equipped with integral surge suppression in the form of a free-wheel diode, eliminating the need for additional accessories, and is immune to short-time voltage interruptions (voltage dips) up to 20 ms. The NF22E-12 is rated for pilot duty applications with A600 and G300 ratings, making it suitable for control circuits in railway electrification systems, signaling equipment, and other mission-critical railway infrastructure where dependable switching and protection are essential.