Obsolete — surplus-channel sourcing
The 1.5KE39C: Sourcing runs through independent surplus and broker channels. Availability and pricing are confirmed at RFQ against specific date-code and quantity requirements; sealed reels with consistent date-codes are preferred over mixed-lot inventory.
1500 W peak pulse — what it protects
The 28.2 A peak pulse current (Ipp) at the clamping voltage tells you the surge the diode can shunt without failing short.
A single bidirectional channel handles positive and negative transients symmetrically, so one DO-201 axial part protects a bipolar signal line or an AC-coupled interface without needing two back-to-back unidirectional diodes. The through-hole DO-201AA package (also known as DO-27) is a standard axial-lead footprint for board-level transient suppression.