600W Zener TVS for general-purpose transient suppression
The P6KE9V1A-B: Its 7.78V reverse standoff voltage protects 5V and 3.3V logic supplies, while the 13.4V clamp at 45A (10/1000µs waveform) limits the spike that reaches the load. With a single unidirectional channel in a through-hole DO-15 axial package, it mounts directly into a PCB or terminal block — common in power-supply input stages, relay coil suppression, and industrial control board protection.
What the key ratings mean for your BOM
For a 24V rail, the 7.78V standoff is too low; this part is sized for lower-voltage rails where the clamp voltage stays well below the downstream component's abs-max rating. The 8.65V minimum breakdown voltage ensures the diode starts conducting before the protected circuit sees damaging overvoltage. The 45A peak pulse current at the clamp voltage tells you the surge capacity — a 10/1000µs surge at 45A will be shunted to ground without letting the rail rise above 13.4V.