A question about the current value in a mains tester

After reading this question, I simulated the tester as in the below circuit along with the current passing through human body:

Even I set the R_tester to zero, the current still will be around 10μA which is too small for a neon bulb. This is due to the Xc being huge because of tiny human body capacitance.

The only way the current to become 0.5mA is to increase the capacitance to around at least 5nF.

But the references say that the human body capacitance is around 100pF in series with 1.5k resistor.

According to these assumptions it seems something is not quite true here.

What could be the problem with the model I've drawn above?

• You have a paralell branch to your R_body and C_body with just an R in the 1-100 kohm range, depending on person, humidity and so on, or simplify it to your R_body bein in paralell to C_body, it will get you close enough. Commented Jun 21, 2017 at 13:09
• But it is modeled in series not in parallel: rfwireless-world.com/Articles/ESD-basics-and-ESD-tester.html What is parallel to what you meant? Commented Jun 21, 2017 at 13:16
• Ah! For high frequency you are more interested in the series capacitance. For 50/60 Hz, you are mostly interested in the resistance. See en.wikipedia.org/wiki/Human-body_model. 1k5 in parallel with 100 pF as a first order approximation. Commented Jun 21, 2017 at 13:39
• see my edit. Should that be modelled this way? that makes sense if the human body model is RC parallel circuit instead of series. Commented Jun 21, 2017 at 14:10
• I believe the problem is that the reference you are using is in error. If the body was modeled as a capacitor in series with a resistor, then no DC current could flow and DC sources would not be a hazard. We know this is not true. It makes much more sense for the body to be modeled as a resistor in parallel with a capacitor and then your issues would disappear. Commented Jun 23, 2017 at 1:27