Obsolete — last-time-buy window is closed
Diodes Incorporated has marked the 1.5KE22A-B as Obsolete. The manufacturer's last-time-buy window has passed — this part is no longer orderable through the factory or its authorized distribution channel. Any available stock is date-code specific and must be verified for authenticity and shelf-life before committing to a lot.
1500 W Zener clamp — 18.8 V standoff, 30.6 V clamp
The reverse standoff voltage is 18.8 V, meaning the protected rail can sit at 18.8 V DC without the diode conducting leakage current. For a 24 V nominal rail, the 18.8 V standoff leaves headroom for a ±10% supply tolerance before the diode begins to avalanche. The junction temperature range spans -55°C to +175°C, which covers military-grade thermal profiles.
DO-201 axial-lead — board-fit note
The 1.5KE22A-B ships in the DO-201AA / DO-27 axial-lead package, with the supplier device package designated DO-201. The 0.052-inch lead diameter requires a 0.055-inch minimum plated-through hole on the PCB. Mounting is through-hole, and the unit is supplied in Bulk packaging, not tape-and-reel — expect loose tubes or bagged quantity. The body length is approximately 9.1 mm; allow 12 mm lead spacing for standard axial insertion.