Need Some Electrical Expertice

[nachoman]

Milli = 1/1000, so you are correct. 5000 mA = 5 amps. That transformer will work fine - but bear in mind the output will be 14 V AC, and you will need a bridge rectifier to convert to DC. The rectifier is made of diodes, and will reduce the voltage by about a volt and a half. Your output DC voltage will be about 12.5 volts. Also, depending on the application, you may need filtered DC, in which case you need a few large capacitors to filter the output current.