The ATC DIVERSIFIED ELECTRONICS ARB-120-ABA is a versatile duplexor alternating relay designed for use in a variety of electrical applications. This relay features two separate input channels, allowing for the automatic switching of power between two sources, ensuring continuous and reliable operation. The ARB-120-ABA is capable of handling a wide range of electrical loads, making it suitable for use in industrial, commercial, and residential settings. With its compact size and durable construction, this duplexor alternating relay offers high performance and maximum reliability.