The maximum input voltage that can be applied to the L78M12CDT-TR is 35V, but it's recommended to keep it below 30V for reliable operation.
To ensure stability, make sure to use a minimum output capacitance of 2.2uF, and keep the input and output capacitors close to the regulator. Also, use a low-ESR capacitor for the output capacitor.
The minimum input voltage required for the L78M12CDT-TR to function properly is 14.5V, but it's recommended to keep it above 15V for reliable operation.
The L78M12CDT-TR is rated for operation up to 125°C, but the output current may need to be derated at higher temperatures. Consult the datasheet for more information.
Use a TVS diode or a transient voltage suppressor in parallel with the input capacitor to protect the L78M12CDT-TR from input voltage transients.