This flyback transformer with input AC 12V 5A 20kHz, output AC 20kV 3mA 20kHz.
Please notice, the high voltage winding of this transformer is in the inner layer, which is a staging skeleton wound encapsulated with epoxy resin, the low voltage winding is in the outer layer. Please notice they are different winding directions between the high voltage and low voltage windings. The transformer has been properly sealed with insulate wax or epoxy resin. Prohibit working load without sealing!
This transformer has two windings, one is primary winding, another one is feedback winding. Secondary output is high voltage.
When this transformer secondary high voltage output disconnects to high voltage rectifier diodes and capacitors, the output is high voltage high frequency, it will breakdown in the air as a pale purple arc without crackling, but the temperature is very high, which can easily ignite a piece of paper or plastic, even very thin wire (which is like the thin wire in oxygen combustion scene but not quite intense)
If composing a voltage doubler by connecting several high voltage capacitors and high voltage rectifier circuit to the output terminal, it can produce high voltage direct current, which can produce negative ion generator.
Note: This transformer also can be applied in less than 12V voltage.
The transformer is designed to be 20kV maximum output, the maximum limit output is 20kV, a higher voltage output will damage the transformer.