Technical data

100 U1401A User’s and Service Guide
5 Application Examples
Another common type of transistor is the TO- 3 package as
shown in Figure 5- 8 on page 101.
Table 5 - 4 Polarities and terminals if Pin 2 is the base
Test l ead s
Pins
Te rm i na ls
(V
be
>V
bc
) Ty p e2-1 2-3
Red/Black 0.6749 V 0.6723 V EBC NPN
0.6723 V 0.6749 V CBE NPN
Black/Red 0.6749 V 0.6723 V EBC PNP
0.6723 V 0.6749 V CBE PNP
Table 5 - 5 Polarities and terminals if Pin 1 is the base
Test l ead s
Pins
Te rm i na ls
(V
be
>V
bc
) Ty p e1-2 1-3
Red/Black 0.6749 V 0.6723 V BEC NPN
0.6723 V 0.6749 V BCE NPN
Black/Red 0.6749 V 0.6723 V BEC PNP
0.6723 V 0.6749 V BCE PNP