Obsolete — sourcing reality for SMAJ26CA-13
Diodes Incorporated has marked the SMAJ26CA-13 as Obsolete.
Clamping and breakdown — the fit parameters
The SMAJ26CA-13 is a bidirectional Zener-type TVS diode with a 26V reverse standoff voltage and a minimum breakdown voltage of 28.9V. This means a 24V rail or a 26V signal line sees the TVS start conducting at 28.9V and holds the line below 42.1V during a surge — adequate for protecting downstream ICs rated to 40V or higher.
400W peak pulse — what it covers
This power class handles typical ESD transients, inductive load dumps, and short-duration surges on low-power supply rails or I/O lines. For longer-duration faults or higher-energy surges, a larger package or higher power rating would be needed.
DO-214AC SMA — board-fit note
Housed in the standard DO-214AC (SMA) surface-mount package, with a supplier device package designation of SMA. The footprint is shared across many TVS diodes and Schottky rectifiers — a replacement in the same package family should fit the existing PCB land pattern without a board spin.
Temperature range and channel count
Single bidirectional channel — one device protects both polarities on a single line, saving board space compared to back-to-back unidirectional diodes.