@SirCaptain posted:A TVS Diode (Transient Voltage Suppression) sacrifices itself when a there's a voltage spike.
Actually, unless it's a massive spike, the TVS does not get damaged. Back in my aerospace electronics days, we had lots of TVS protection diodes on equipment, and we sure didn't want them failing since the contract specs called for some very long MTBF times. The suppression device that sacrifices itself is the MOV Metal Oxide Varistor, it's a totally different technology.