Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Solid State => Topic started by: plexi50 on October 25, 2011, 07:41:23 am

Title: TO-220 Transistor Impedance
Post by: plexi50 on October 25, 2011, 07:41:23 am

Is there an impedance that is asscociated with TO-220 driver transistors

Title: Re: TO-220 Transistor Impedance
Post by: PRR on October 25, 2011, 07:06:39 pm

I don't understand the question.

Naked transistor is a lot like a couple diodes. "Impedance" depends on polarity and also test voltage.

Title: Re: TO-220 Transistor Impedance
Post by: plexi50 on October 26, 2011, 03:08:39 pm

I was reading the Data on the TO-220 on a website which i dont remember now. It said something about an impedance. I deleted that data sheet yesterday. I see no mention of impedance on the data sheet from ON SEMICONDUCTOR on the Newark website.

Title: Re: TO-220 Transistor Impedance
Post by: sluckey on October 26, 2011, 03:29:30 pm

The TO-220 is a style of electronic component package, commonly used for transistors, silicon-controlled rectifiers, and integrated circuits. It's not any particular type of transistor. Impedance is not associated with package style.

TO-220 is a popular style for medium to high power junction transistors. It's also common for 3 terminal voltage regulator ICs. And it's very popular in this forum in the VVR circuit. The active ingredient in the VVR is a TO-220 style MOSFET.

More than you'll want to know about TO-220 right here...
http://en.wikipedia.org/wiki/TO-220 (http://en.wikipedia.org/wiki/TO-220)