We just had the alternator replaced but it is still doing this. It doesn't seem to be draining the battery any because the car starts right up again, but it stalled 4 times today, turning off the electrical equipment along with the engine.
The car stalls at stop signs and lights. The radio turns off. on 2002 Kia Sedona
Would you by chance have a check engine light on, it also sounds like there is a bad connection, maybe overheating from resistance.