Automotive-grade 1500 W Zener TVS for high-energy transient clamping
The 1.5KE250AH: Reverse standoff voltage is 214 V; breakdown occurs at 237 V minimum, clamping at 344 V maximum with a 4.5 A peak pulse current.
Clamping voltage and pulse current — what the ratings mean for the BOM line
The 344 V clamp tells you the highest voltage the downstream circuitry sees during a 10/1000 µs surge — a 24 V or 48 V DC bus protected by this TVS will not exceed 344 V before the diode conducts. 4.5 A peak pulse current is the current the diode can sink at the clamp voltage; multiply 4.5 A × 344 V ≈ 1548 W, consistent with the 1500 W rating. No power line protection means this is a signal-rail or DC-bus clamp, not a mains AC protector — it shunts fast transients, not sustained overvoltage.
Package and board fit — DO-201 axial for through-hole assembly
DO-201AA / DO-27 axial package, supplier device package DO-201 — the glass-passivated body stands up to reflow or wave-solder thermal profiles. Through-hole mounting means the leads insert into plated through-holes; the axial body lays flat or stands upright depending on the board layout and clearance requirements. Supplied in tape and reel — the axial leads are taped per EIA-296 for automated insertion, not hand-load.