Clamp voltage and transient energy rating
The SMAJ11A-13-F is a Zener-based unidirectional TVS in the standard DO-214AC (SMA) surface-mount package.
Breakdown and standoff margins
Minimum breakdown voltage is 12.2 V, with a reverse standoff of 11 V — the TVS starts conducting leakage current above 11 V but does not avalanche until 12.2 V. For a 12 V nominal supply with ±5 % tolerance (11.4 V to 12.6 V), the standoff sits below the worst-case rail voltage, so the TVS stays off during normal operation and only activates on an overvoltage transient. Operating temperature range spans -55 °C to 150 °C (junction), covering industrial enclosures and under-hood automotive environments where the ambient may reach 125 °C with self-heating margin.