Uh, no. 12,000V X .005A = 60 Watts. If you packed all the tungsten wires in the space of the filament of a 60 watt light bulb, then it would get as hot as a 60 watt lightbulb. The heat dissipation will be distributed over the area of the tungsten wires - pretty spread out. You probably wouldn't notice a temperature rise anywhere along the length of wire. (after shutting it off and letting it discharge, of course )
With 12,000 VDC/5 ma Max passing through the ionizer, one would think
it might get a little warm, no ?
Weston Bye - Practitioner of the Electromechanical Arts - Author of The Mechatronist Column, Digital Machinist magazine