Component Pinouts

Most of the transistors mentioned in this document and listed in the table above use the "TO92" package. Because the parameters of most of the transistors used in this design are somewhat critical, you may wish to substitute better or more readily available devices. This section should help by showing the pinouts for all TO92-packaged transistor types mentioned in this document. There are three common pin arrangements for the TO92 package - the American, Japanese and European pinouts - as shown in these illustrations. Thanks to Motorola for the stylish component drawing.

TO-92 American pinout, 2K

American

2N3904
2N6426,7
BC372,3
BF393
BF844
MPSA13,14,25-29,42,44
MPSW42
PBF259
PN3439,40

    
TO-92 Japanese pinout, 2K

Japanese

2SC2610
2SC4647
BF420,2
BF483,5,7

    
TO-92 European pinout, 2K

European

BC517
BC547B
BC548C
BC618

Please send any comments, suggestions, problem reports etc to k@heidenstrom.gen.nz.