500W Zener TVS for a 136.8V Rail — What It Protects
The 1N6136: It clamps a 136.8V nominal rail to 245.7V at 2A peak pulse current, which is the number your downstream MOSFET or DC-DC converter sees during a surge. Bidirectional means one device handles both positive and negative transients — useful on AC-coupled lines or floating supplies where polarity isn't fixed.
Clamping Voltage and Pulse Current — The Numbers That Matter for Your BOM
Breakdown voltage starts at 171V minimum; the standoff is 136.8V, so a 136.8V rail sits below the avalanche threshold during normal operation. At the rated 2A peak pulse current the clamp rises to 245.7V — that 1.8× ratio tells you the headroom your downstream circuitry needs to survive. No power-line protection feature means this part is designed for signal or low-energy secondary protection, not for mains-side surge suppression. The through-hole B, Axial package is a standard footprint — easy to hand-replace on a repair bench or wave-solder in production.
Active Production — No Last-Time Buy Needed
Microchip lists the 1N6136 as Active.