Obsolete — last-time-buy window closed
The 1.5KE13-E3/54: Vishay has marked the 1.5KE13-/54 as Obsolete.
1500W peak pulse — the clamping envelope
This is a 1500W (1.5kW) peak pulse power TVS in the TransZorb series, rated for a 10/1000µs waveform. The reverse standoff voltage is 10.5V typ — the rail it protects must stay below this in normal operation. Breakdown triggers at 11.7V min, and the clamping voltage at full peak pulse current (78.9A) is 19V max. That 19V ceiling is the voltage the downstream circuitry must survive during a transient event.
Unidirectional, axial-lead — board-fit constraints
Single unidirectional channel (cathode band) in a DO-201AA / DO-27 axial through-hole package. The junction temperature range is -55°C to 175°C, covering industrial and military-temperature environments. Power Line Protection is marked No — this device is intended for DC signal or low-voltage rail clamping, not AC mains primary-side suppression.