What this Zener TVS does and where it fits
The 1N6272AG is a unidirectional Zener TVS diode from onsemi's Mosorb™ series, designed to clamp transients on a 9.4V nominal rail with a peak pulse power rating of 1500W. It comes in a DO-201AD axial through-hole package, which means it's a hand-insert or wave-solder part — not a reflow candidate.
Key ratings for your BOM decision
The 10.5V minimum breakdown voltage and 15.6V maximum clamping at peak pulse current define the protection window. For a 9.4V rail, the clamp margin is tight — about 6.2V above the working voltage — so the downstream circuitry must survive that clamp level. The 1500W rating is a 10/1000 µs waveform rating; real-world surge energy depends on the pulse shape and duty cycle.
Sourcing reality: obsolete status and what that means
onsemi lists the 1N6272AG as Obsolete. That means no ongoing production and no guaranteed last-time-buy window. If you have an open BOM position, you are looking at the spot market or a distributor's remaining stock. The base part number is 1N6272, so any suffix variant (like the 'AG' lead-free finish) is also end-of-life. Confirm the exact date code and quantity available before committing the line.