Clamping voltage and pulse current — the real protection limits
The 1.5KE350CA-B: At the 10/1000µs test waveform, the device clamps at 482V while conducting 4A peak pulse current. The 300V reverse standoff means the TVS draws negligible leakage below normal line voltage — it only starts conducting when the transient exceeds the 332V breakdown threshold. The 1500W peak pulse rating is the product of clamp voltage and peak current at the test condition — a common industry metric for comparing TVS diodes in this power class. For a 300V nominal rail, the 482V clamp provides a safety margin above the maximum operating voltage.
DO-201 axial package and temperature range
Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), it mounts through-hole — the leads are soldered into plated through-holes on the PCB. The bulk packaging means the parts ship in tubes or loose in a bag — not on tape and reel. This is typical for axial-lead devices and matters for pick-and-place feeder setup if you are running a through-hole insertion line.