Transient suppression for 273 V rails
The 1.5KE320A: The DO-201AA axial package suits through-hole mounting on boards where a replaceable, high-surge clamp is preferred over surface-mount alternatives.
Peak pulse power and thermal margin
Rated 1500 W for a 10/1000 µs exponential waveform, this diode absorbs transient energy without entering thermal runaway — the 3.5 A peak pulse current at the clamping voltage confirms the power rating. The unidirectional configuration clamps positive transients relative to ground; for bidirectional protection on AC-coupled lines, a series pair or a bidirectional variant is needed.