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BD135 - BD136
BD139 - BD140

Complementary low voltage transistor

Features
Products are pre-selected in DC current gain

Application
General purpose
1
2
3

Description SOT-32

These epitaxial planar transistors are mounted in
the SOT-32 plastic package. They are designed
for audio amplifiers and drivers utilizing
complementary or quasi-complementary circuits.
The NPN types are the BD135 and BD139, and
Figure 1. Internal schematic diagram
the complementary PNP types are the BD136
and BD140.




NPN PNP




Table 1. Device summary
Order codes Marking Package Packaging

BD135 BD135
BD135-16 BD135-16
BD136 BD136
BD136-16 BD136-16
BD139 BD139
SOT-32 Tube
BD139-10 BD139-10
BD139-16 BD139-16
BD140 BD140
BD140-10 BD140-10
BD140-16 BD140-16


May 2008 Rev 5 1/9
www.st.com 9
Contents BD135 - BD136 - BD139 - BD140


Contents

1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8




2/9
BD135 - BD136 - BD139 - BD140 Electrical ratings


1 Electrical ratings

Table 2. Absolute maximum ratings
Value

Symbol Parameter NPN PNP Unit

BD135 BD139 BD136 BD140

VCBO Collector-base voltage (IE = 0) 45 80 -45 -80 V
VCEO Collector-emitter voltage (IB = 0) 45 80 -45 -80 V
VEBO Emitter-base voltage (IC = 0) 5 -5 V
IC Collector current 1.5 -1.5 A
ICM Collector peak current 3 -3 A
IB Base current 0.5 -0.5 A
PTOT Total dissipation at Tc 25