ST TIP41 / TIP42 DATASHEET ANOMALY? - diyAudio
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Old 24th February 2015, 11:30 AM   #1
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Default ST TIP41 / TIP42 DATASHEET ANOMALY?

The tip41/tip42 data sheet shows a massive difference in hFE, yet they are supposed to be a complentary pair, is this correct?

I have attached a PDF copy of the datasheet
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File Type: pdf CD00142950.pdf (267.5 KB, 9 views)
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Old 24th February 2015, 03:22 PM   #2
wg_ski is offline wg_ski  United States
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It's not unusual to see even gross beta differences between NPN and PNP. They are more similar at large currents - both between 20 and 30 at 5A.
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Old 24th February 2015, 09:25 PM   #3
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Thanks wg-ski, I see that now re-examining the curves the big differences are only at lower collector currents where you wouldn't normally operate a power transistor.
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