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NPN Transistortestare

Thread Summary

The user inquired about using the models TT10_NPN_2N3904 and TT10_PNP_2N2907 as example circuits for NPN and PNP symbols in LTSpice. The final answer confirmed that these models can be used for this purpose and emphasized the importance of understanding the symbols used in simulations.
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Category: Software
Product Number: TT10_2N3904
Software Version: 1.0 (LTSpice version 24.1.9)

Edit Notes

The model NPN_TT_2N3904 does make it possible to test NPN transistors UBE IB and HFE it is also possible to measure UBE. The current model does test with 2.0mA IC. It is possible to test different types of transistors by replaceing the transistor symbol. Was forced to change the name because TT10 is a larger construction with box and more components Found out that the IB current is allready there as the current through R5 the e element is not needed Anders I Larsson
[edited by: AndersIL at 4:03 PM (GMT -4) on 25 Sep 2026]
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