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