Transient suppressor for 214V DC rails
The 1.5KE250AG is a unidirectional Zener TVS diode from onsemi's Mosorb™ series, designed to clamp transients on DC rails up to 214V continuous (reverse standoff) with a peak pulse power rating of 1500W (10/1000µs waveform). In a typical 214V bus application, the device breaks down at 237V minimum and clamps at 344V maximum, shunting 5A of surge current away from the load. The wide operating temperature range of -65°C to 175°C makes it suitable for outdoor, industrial, or under-hood environments where thermal cycling is a concern.
Obsolete – last-time-buy window closed
onsemi has marked the 1.5KE250AG as Obsolete. For existing BOMs, procurement should verify date-code authenticity and source from verified inventory through an RFQ. The DO-201AD axial package is widely used in through-hole designs, so a form-fit-function replacement from the same 1.5KE series or another manufacturer's TVS portfolio is the practical path forward.
Package and mounting – DO-201AD axial
The part comes in a DO-201AD axial-lead package, through-hole mount. The axial form factor is straightforward for hand-soldering or wave-solder rework; lead bending for board standoff is common. The package is, so reel or tape quantities are not an option for automated pick-and-place.