Just what we ordered replaced the one that was burned out. (Coil Zapped by 230 volt surge)
The original unit had the landline coil zapped by a 230 volt surge. The surge protector that is supposed to prevent this from happening failed. The female end of the surge protector had a bad terminal on one ground spade. this caused a surge of 230 volts that caused the coil to burn out. I was able to replace the old transfer switch with the new in a very short time. Exact fit and new one works great.