What the 1.5kW peak pulse rating means
The 1N6267-E3/73: The TransZorb construction handles that peak power dissipation in the clamping state where a standard Zener would not survive; the 5.5 V reverse standoff gives the protected rail headroom before the device turns on. Maximum junction temperature is 175 °C, which gives margin in high-ambient or thermally transient environments — the through-hole leadframe also provides a thermal path the board layout should respect.
Axial DO-201AA package and board integration
The part ships in the DO-201AA (DO-27) axial leaded package, mounted through-hole. The 1.5KE supplier device package designation indicates the standard voltage selection band — the two lead wires require adequate pad geometry and hole size for wave or hand-solder assembly; the lead spacing should be verified against the board footprint before committing a BOM line. Classified for general-purpose applications, not power-line protection.
Obsolete status and sourcing posture
The base part number 1N6267 identifies the family, but replacement sourcing requires independent channels; availability and lot traceability are confirmed at RFQ.