1500W axial TVS for 342V rails
The 1.5KE400A A0G: Breakdown occurs between 380V minimum, so the part protects 342V nominal DC rails from surges that would otherwise stress downstream semiconductors. The single unidirectional channel handles positive-going transients; for bidirectional protection a second device or a different series is needed.
Pulse current and temperature envelope
Rated 2.8A peak pulse current at the 10/1000µs test condition — this is the current that produces the 548V clamping voltage across the device. The junction temperature range spans -55°C to 175°C, so the diode survives both cold-start and hot-bench environments common in industrial and telecom gear. The DO-201 axial body suits through-hole assembly and allows manual replacement in rework or field repair.