1

Power Transistors

2SC3944, 2SC3944A

Silicon NPN epitaxial planar type

For low-frequency driver and high power amplification

Complementary to 2SA1535 and 2SA1535A

q

q

q

Makes up a complementary pair with 2SA1535 and 2SA1535A,

which is optimum for the driver-stage of a 60 to 100W output

amplifier

q

Full-pack package which can be installed to the heat sink with

one screw

Parameter

Collector to

base voltage

Collector to

emitter voltage

Emitter to base voltage

Peak collector current

Collector current

Collector power

dissipation

Junction temperature

Storage temperature

Symbol

Ratings

150

180

150

180

5

1.5

1

15

2.0

150

–55 to +150

Unit

V

V

V

A

A

W

˚C

˚C

2SC3944

2SC3944A

2SC3944

2SC3944A

Ta=25

°C

Parameter

Collector cutoff

current

Collector to base

voltage

Emitter to base voltage

Forward current transfer ratio

Collector to emitter saturation voltage

Base to emitter saturation voltage

Transition frequency

Collector output capacitance

Symbol

*

Conditions

min

150

180

5

95

50

typ

160

100

0.5

1

200

30

max

10

10

220

2

2

50

Unit

µA

V

V

V

V

MHz

pF

2SC3944

2SC3944A

2SC3944

2SC3944A

Rank

Q

R

95 to 155

130 to 220

Unit: mm

1:Base

2:Collector

3:Emitter

TO–220 Full Pack Package(a)

10.0

±0.2

5.5

±0.2

0.5

+0.2

–0.1

1.4

±0.1

1.3

±0.2

0.8

±0.1

2.54

±0.25

5.08

±0.5

2

13

2.7

±0.2

4.2

±0.2

φ3.1±0.1