I am making a device that will have an external alarm in case of alarm condition or power outage. I was thinking of using a solid state relay with a NC connection, and applying current to hold it open while there is power, and if there is alarm or power outage, the current drops out and the relay will close, making the connection to sound the alarm.
Will the relay last for years if it is essentially held open all the time? I can only find data on number of operations, which is about 100,000 times.
Here is the relay I am looking at (I know it is 10 amps and I can use smaller, but I am using 4 other of these on the board now…i will likely change it later).