1500W Zener TVS in a DO-201AD axial body
The 1.5KE15ARL4 is a unidirectional Zener TVS diode from onsemi's Mosorb™ series, rated for 1500W peak pulse power at 10/1000µs. It clamps transients to 21.2V maximum at 71A peak pulse current, with a reverse standoff voltage of 12.8V. The DO-201AD axial package suits through-hole mounting on boards where a soldered lead provides mechanical retention and thermal path to the copper pad.
Breakdown and clamping — the numbers that matter
Breakdown voltage is specified at 14.3V minimum, so the device starts conducting at that threshold. The clamping voltage caps at 21.2V across the full 71A peak pulse current — this is the voltage the downstream circuitry sees during a surge event. Operating temperature spans -65°C to 175°C junction, covering most industrial and automotive under-hood environments without derating concerns.
Obsolete — sourcing reality for the BOM line
onsemi lists the 1.5KE15ARL4 as Obsolete. For a BOM that requires this exact clamp voltage and package, a last-time buy or a cross to a same-spec sibling in the 1.5KE series (e.g., 1.5KE15A) is the practical path. We source against the RFQ quantity — confirm the BOM position and we'll pull availability across our supply network.
DO-201AD axial — what the package means for assembly
The DO-201AD axial body is 0.210-inch diameter with 0.040-inch lead diameter — standard for through-hole wave-solder or hand-solder rework. No MSL concern because the body is molded epoxy with no internal cavity; it survives the oven without a bake step. The lead bend radius must clear the body by at least 0.050 inch to avoid cracking the epoxy during forming. Check the pad spacing on your PCB: the lead pitch is 0.400 inch nominal.