It is 2024, and I still found this;

Thread Starter

schmitt trigger

Joined Jul 12, 2010
917
….In a brand new equipment. A three phase motorized-VARIAC, AC voltage regulator.

It has one of these for each phase. It is used as a comparator to drive, via a TIP41 and TIP42, the VARIAC’s motor.

What I find odd, is a “Texas Instrument” linear IC with the UA prefix.
Fake?
EDIT: Wbahn corrected me, TI does use the UA prefix.
 

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Papabravo

Joined Feb 24, 2006
21,256
What's odd about a TI linear IC with a UA prefix?

https://www.ti.com/lit/ds/symlink/ua741.pdf?ts=1711499340998

See addendum page 1.

Now, it might still be fake. The quality of the print might raise an eyebrow, but I don't know what the quality of the legitimate device markings from TI are these days.
UA741 is an opamp, originally labeled µA741 by Fairchild, for which TI was or maybe still is a 2nd source. It is certainly not a TIP-41 in that package.
 

WBahn

Joined Mar 31, 2012
30,233
UA741 is an opamp, originally labeled µA741 by Fairchild, for which TI was or maybe still is a 2nd source. It is certainly not a TIP-41 in that package.
As shown in the Addendum page I referred to, it is still an active TI part.

Who's thinking it's a TIP-41?
 

Thread Starter

schmitt trigger

Joined Jul 12, 2010
917
Hmmmm
I was under the (incorrect) impression that TI would have used the LM prefix.
Anyway, the point in my post was that over 50 years after its introduction, the 741 is still found in commercial products.
 
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