Hongfa HF10FH Power Relays 10A 8-Pin Plug-In 2-Pole Changeover – Hongfa HF10FH024A2ZDT, This 10A 24V AC plug-in power relay is a robust device that has high electrical and mechanical endurance. Features include silver alloy contacts and a lockable push to test button. Hongfa HF10FH024A2ZDT 2 Pole 10A 24VAC 8 Pin Plug In Power Relay