1.5 kW peak-pulse clamping — what the TVS ratings mean
The 1N6272A-E3/73: The 1N6272A-/73 is a unidirectional TransZorb® TVS diode — a Zener wired specifically to clamp transient voltage spikes rather than regulate. The three ratings that define protection fit are the reverse standoff (the working voltage the line sits at undisturbed), the breakdown threshold, and the clamping ceiling under peak pulse current. A 9.4 V reverse standoff means the diode stays off and draws only leakage current while the protected line operates at or below that voltage. This rating — combined with the 96.2 A peak pulse current — tells you it survives Class 2 or moderate Class 3 surge levels per IEC 61000-4-5 without cascading an upstream fuse or input stage.
High-temperature junction and thermal margin
The DO-201AA (also called DO-27) axial package is the standard through-hole outline for 1.5 kW TVS diodes. Leads are soldered directly to PCB holes — no surface-mount reflow profile. The Tape & Box packaging variant /73 ships on a taped reel with a box, common for automated insertion in production runs.
TransZorb® series — single-channel unidirectional protection
The TransZorb® series is Vishay's internal brand for its Zener-based TVS construction. This part is unidirectional (one direction clamps positive transients) — for bidirectional protection across AC lines or differential signaling, look for the Vishay part variant with a 'C' suffix instead (1N6272CA).