Obsolete — sourcing through independent channels
The 1.5KE250C-B is listed as Obsolete by Littelfuse. No stock-holding claim is made.
Key TVS parametrics for BOM fit
The 214V reverse standoff voltage defines the continuous DC or AC peak operating level below which the diode is effectively open — useful for 170-190 VDC rails or 120-140 VAC lines. Breakdown voltage min 225V; clamping is specified at 361.2V max at 4.4A peak pulse current. The 4.4A Ipp figure is the current the device can handle at the clamp voltage before the pulse energy exceeds the 1500W rating — derate for longer pulse widths or higher ambient temperatures per the datasheet curve. Junction temperature range -55 to +175°C covers industrial and military-temperature applications — the derating to 1500W at 25°C ambient must be applied above 25°C per the standard thermal derating curve for axial-lead DO-201 packages.
Package and board-fit — DO-201 axial
Through-hole DO-201AA / DO-27 axial package, supplier device package DO-201. The axial leads are suited for point-to-point wiring or PCB through-hole mounting with 0.042-inch (1.07 mm) diameter leads — standard 1.1 mm plated-through holes on 0.5-inch lead spacing accommodate the body length. Supplied in bulk — no tape-and-reel packaging. For automated insertion, a tube or ammo-pack variant may be needed; confirm the packaging code suffix before committing to a pick-and-place feeder.