What this 1.5kW Zener TVS protects against
The 1.5KE39A_R2_00001: With a peak pulse power rating of 1500 W (10/1000 µs waveform) and a clamping voltage of 53.9 V at 28 A, this part absorbs high-energy surges — think load-dump events, inductive kickback, or lightning-induced transients on a 24 V or 33 V bus. The 33.3 V reverse standoff voltage means the diode stays out of the circuit below that level; it only starts conducting when the line exceeds the 37.1 V minimum breakdown threshold.
Package and board-fit for a through-hole design
Housed in a DO-201AE axial-lead package, this TVS diode is a through-hole part — it inserts into a plated through-hole on the PCB and is wave-soldered or hand-soldered. Operating temperature spans -65 °C to 175 °C junction, covering military and industrial thermal extremes — a relay driver or motor controller in a hot cabinet sees no derating concern.
Lifecycle status and how to source it now
Panjit lists the 1.5KE39A_R2_00001 as obsolete — the manufacturer no longer produces it as a standard catalogue item. No official successor order code is recorded from Panjit; the closest functional replacement is another 1.5KE39A from a different brand or a current-production TVS with the same 33.3 V standoff and DO-201AE package, but pin-compatibility must be verified per the BOM position. We source this part through independent distribution channels — surplus and new-old-stock inventory.