500W peak pulse power — what it buys the design
The 1N6115A is a Zener transient-voltage-suppression (TVS) diode from Microchip Technology, rated for 500W peak pulse power per the 10/1000 µs waveform. That 500W rating means the part can absorb a 15 A surge before the clamp voltage rises to 33.3 V — enough to protect a 18.2 V rail from lightning-induced transients or inductive load dumps in industrial and mil-spec gear. Single bidirectional channel clamps both polarities, so you don't need back-to-back Zeners on AC or bipolar signal lines.
Clamping voltage and breakdown margin
Reverse standoff is 18.2 V typical; the device starts conducting at 22.8 V minimum breakdown. That 4.6 V margin between standoff and breakdown gives the protected circuit headroom — the rail can ride through normal ripple without the TVS leaking appreciably. Clamp is 33.3 V maximum at 15 A peak pulse current. For a 15 V or 18 V logic supply, that clamp stays within the absolute-max rating of most downstream ICs, but verify against your specific device's max input voltage.
Active production — where to source
Lifecycle status is Active — no EOL notice, no NRND flag. Confirm the exact breakdown voltage window your design requires before substituting.