Zener TVS for 26V rail protection
Its 28.9V minimum breakdown voltage and 46.6V maximum clamping at 12.4A peak pulse current define the protection window for downstream components.
Breakdown and clamping at 28.9V / 46.6V
The 28.9V minimum breakdown ensures the diode begins conducting before the protected rail exceeds its absolute maximum rating. The 46.6V clamping ceiling at 12.4A peak pulse current limits the voltage spike seen by the load — a critical parameter for 26V-rated ICs and capacitors that cannot tolerate excursions above ~50V.
Active production in DO-214AA (SMB)
Microchip lists the SMBJ26E3/TR13 as Active, meaning ongoing factory production with no announced end-of-life. The base product number SMBJ26 covers the full voltage variant family; the suffix indicates RoHS-compliant termination finish.