1500 W peak pulse — where the 1.5KE24A sits in the cycle
The 1.5KE24A_R2_00001: Its 20.5 V reverse standoff means it stays out of conduction during normal operation, and the 33.2 V clamp at 45 A peak pulse current (10/1000 µs waveform) catches overvoltage events before they reach downstream silicon. The DO-201AE axial-lead package is a through-hole form factor that suits point-to-point wiring or PCB mounting where the board can handle the lead diameter. Operating temperature spans -65°C to 175°C junction, covering most industrial and telecom environments.
Obsolete — what that means for a BOM line
Panjit lists this part as obsolete. No official successor order code is recorded, so the BOM line relies on independent-distribution inventory — surplus, overstock, or last-time-buy lots that are traceable and tested. For a 24 V rail TVS, the closest functional equivalent would share the same standoff voltage (20.5 V), clamp voltage (~33 V), and 1500 W peak pulse rating in a DO-201AE package. Without a factory-specified cross, the replacement is parametric — confirm the clamp voltage and pulse current match the protection requirement before substituting.
Voltage ratings and pulse current — the selection check
The breakdown voltage min is 22.8 V, so the diode starts conducting just above the 20.5 V standoff. Power line protection is marked 'No' — this is a unidirectional Zener TVS for DC rails, not an AC power-line suppressor. The single unidirectional channel handles positive transients referenced to ground; a bidirectional pair would be needed for AC-coupled lines.