The 1.5KE18HE3/73: It clamps a 14.5 V nominal rail at 26.5 V during a 56.6 A, 10/1000 µs surge, absorbing 1500 W peak pulse power.
Lifecycle reality — obsolete, but sourced
Vishay lists this part as obsolete.
1.5KE18HE3/73 Vishay Zener TVS, 1500W, DO-201AA, Obsolete
MPN1.5KE18HE3/73
Obsolete
Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 TransZorb® Zener TVS, 1.5KE18HE3/73, 1500W peak pulse, 14.5V standoff, DO-201AA axial, Tape & Box.
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | Automotive, AEC-Q101, TransZorb® |
| Mounting | Through Hole |
| Voltage - breakdown | 16.2V |
| Voltage - clamping (Max) @ ipp | 26.5V |
| Voltage - reverse standoff | 14.5V |
| Current - peak pulse (10/1000μs) | 56.6A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -55°C~175°C(TJ) |
| Package | Tape & Box (TB) |
| Applications | Automotive |
| Case | DO-201AA, DO-27, Axial |
| Unidirectional channels | 1 |
Product details
Frequently asked questions
What is the closest pin-compatible alternative to 1.5KE18HE3/73?
A functionally equivalent TVS in the same DO-201AA package with a 14.5 V standoff and 1500 W rating would need to be evaluated per the application's clamping and breakdown voltage requirements.