Obsolete TVS — Sourcing for Existing BOM Lines
The Vishay 1.5KE150HE3/73 is an obsolete TransZorb® TVS diode from the Automotive, AEC-Q101 qualified series, designed to clamp transients on 121 V nominal rails in automotive and industrial power systems. The 136 V minimum breakdown voltage ensures the device begins conducting before the protected circuit's absolute maximum rating is reached, given a 121 V reverse standoff.
Clamping and Temperature Envelope
The 215 V clamping voltage at 7 A defines the maximum voltage the downstream circuitry sees during a surge event — a critical parameter for selecting downstream capacitor voltage ratings and semiconductor BVdss margins. The DO-201AA (DO-27) axial-lead package allows through-hole mounting on boards where a surface-mount TVS may not survive the reflow profile or where a higher creepage distance is required.
AEC-Q101 Qualification and Application Context
The TransZorb® series is Vishay's branded TVS technology, optimized for fast response to transients with low dynamic impedance, ensuring the clamp voltage stays tight under high surge currents. Marked for automotive applications, this TVS is suited for 12 V, 24 V, and 48 V vehicle electrical systems where the nominal rail is 121 V — typically found in DC-DC converter outputs or high-voltage bus protection in hybrid/EV powertrains.