Question: 20 va is how many amps?
Answer: I purchased this transformer because it puts out 24 Volts AC (alternating current) and 20 VA (Volt-Amperes) a.k.a. Watts. To calculate the current (Amperes or Amps), divide 20VA by 24V. 20/24=0.833 Amps or 8330mA (milliamps).