Littelfuse AF0500-00 is a versatile relay designed for fail-safe and non-fail-safe applications. With 3 Form C (N.O./N.C.) and 1 Form A (N.O.) contacts, it offers options for different system types including solidly grounded AC, resistance grounded AC, and ungrounded AC. With a supply voltage range of 100-240VAC and features such as latching auto manual reset, front-panel test button, and two remote contacts, this relay provides flexibility and convenience. The presence of 4 digital inputs adds another layer of functionality to this reliable and high-performance product.