Need Assistance: To220 replacement for MJE720 or 2N2219a

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Hi Peter,
2SD669a could be a good replacement but its not pin compatible,
Okay, so rotate the part so the leads line up.

The 2N2219 was a fast little thing, so if you can get by with a 50 mA device, a 2SC3423 would work well (200 MHz). The 2SC3421 has a transition frequency of 120 MHz, compared to the 2N2219A's 300 MHz rating and the 2SD669A's rating of 140 MHz.

The 2N2219A was a very common transistor, so you should still be able to scare one up somewhere. Many students taking electronics had these in there kits for their course. I imagine there must be thousands of these in closets around the world!

-Chris
 
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