What the 1500W rating means for your protection design
The 1.5KE24CA-B is a 1500W bidirectional TVS diode from Diodes Incorporated, rated for 20.5V reverse standoff voltage and clamping at 33.2V when hit with a 45A peak pulse current (10/1000µs waveform). That 1500W peak pulse power is the energy it can absorb in a single transient without failing — it's sized for secondary protection on DC power rails or signal lines where the energy source is limited, not for direct mains surge suppression. The 20.5V standoff is the maximum continuous voltage it can sit across without conducting leakage — anything above that and it starts to avalanche.
Obsolete — what that means for procurement
Diodes Incorporated has marked the 1.5KE24CA-B as obsolete. No pin-compatible drop-in replacement is listed by the factory, so a board spin may be needed if you're migrating to a current-production part.
Package and mounting — through-hole axial
Housed in a DO-201AA / DO-27 axial leaded package, the 1.5KE24CA-B is a through-hole part. The bulk packaging means it ships loose in a bag or tube, not taped and reeled, which is typical for through-hole parts ordered in moderate quantities.
Temperature range and application context
The wide range means it can sit in an outdoor enclosure or near a hot power supply without derating the transient protection. The 'No Power Line Protection' flag means it's not intended for direct AC mains input protection — it's a secondary-side or signal-line suppressor where the energy is lower and the clamping voltage is tight.