1500W transient suppressor for 7.78V rails
The 1.5KE9.1-B: It clamps transients on a 7.78V nominal rail to 14.07V maximum, with a breakdown voltage range starting at 8.17V.
What the clamping voltage means for your protected circuit
The 14.07V clamp ensures the downstream IC sees no more than that peak, which is within the abs-max rating of most 12V-tolerant logic and power-management devices. The 113.4A peak pulse current rating (at 10/1000µs) means it can absorb a substantial lightning-induced or inductive-load dump surge without failing short — the 1500W peak pulse power is the product of clamp voltage and current at that waveform.
DO-201 axial package — board integration note
The DO-201AA (DO-27) axial leaded package is a through-hole form factor with a 0.052-inch lead diameter, designed for wave-solder assembly or hand-soldering into plated through-holes. The bulk packaging means parts are loose in a bag or tube — no tape-and-reel for automated pick-and-place.