1500 W peak pulse, 6.4 V standoff — TransZorb clamping for DC rails
The 1.5KE7.5A-E3/54: It is a unidirectional device in a through-hole DO-201AA (DO-27, Axial) package, intended for general-purpose circuit protection on low-voltage DC buses.
Clamping voltage and pulse current — what the ratings mean for the rail
The 6.4 V reverse standoff is the maximum DC or peak-AC voltage the TVS can sit across without conducting appreciably. A 5 V supply rail with 10 % tolerance (5.5 V max) stays below this standoff, so the diode does not leak or wear in normal operation. The 7.13 V minimum breakdown voltage (the point where the Zener junction starts conducting) sits between the standoff and the clamp — the TVS transitions from high-impedance to low-impedance in this window, shunting the surge current to ground.
Temperature range and package — through-hole axial for board-level retrofit
The device is not rated for power-line protection (Power Line Protection: No) — it is designed for secondary-side DC rail clamping, not AC mains surge suppression.
Active lifecycle — stocked and quoted per RFQ
Vishay lists the 1.5KE7.5A-/54 as Active.