1500W bidirectional transient suppressor — obsolete, sourced to order
The 1.5KE75C-E3/73: It clamps transients at 109V maximum with a 60.7V reverse standoff voltage, so it protects 48V or 60V DC rails from surges without conducting under normal line voltage.
Minimum breakdown voltage is 67.5V, maximum clamping at peak pulse current (13.9A) is 109V. The 60.7V standoff rating means the diode stays off below that voltage — no leakage penalty on a nominal 48V bus. The 1500W peak pulse rating is the energy it absorbs in a single 10/1000 µs surge; above that the device fails short or open.
Sourcing an obsolete TransZorb
With an Obsolete lifecycle status, the 1.5KE75C-/73 is no longer manufactured by Vishay. No official successor or pin-compatible alternative is listed in the record.