Page 1
Transistors
This product complies with the RoHS Directive (EU 2002/95/EC).
2SD1938(F)
Silicon NPN epitaxial planar type
For low-voltage output amplification
For muting
For DC-DC converter
■ Features
• Low ON resistance R
• High forward current transfer ratio h
• Mini type package, allowing downsizing of the equipment and
automatic insertion through the tape packing
on
FE
10˚
0.40
3
1
(0.95) (0.95)
1.9
±0.1
+0.20
2.90
–0.05
+0.10
–0.05
+0.25
–0.05
+0.2
–0.3
2.8
1.50
2
(0.65)
5˚
0.16
Unit: mm
+0.10
–0.06
■ Absolute Maximum Ratings Ta = 25°C
+0.2
–0.1
+0.3
Parameter Symbol Rating Unit
Collector-base voltage (Emitter open) V
Collector-emitter voltage (Base open) V
Emitter-base voltage (Collector open) V
Collector current I
Peak collector current I
Collector power dissipation P
Junction temperature T
Storage temperature T
CBO
CEO
EBO
C
CP
C
j
−55 to +150 °C
stg
50 V
20 V
25 V
300 mA
500 mA
200 mW
150 °C
Marking symbol: 3W
–0.1
1.1
1.1
0 to 0.1
JEDEC: SOT-346
Mini3-G1 Package
1: Base
2: Emitter
3: Collector
EIAJ: SC-59
■ Electrical Characteristics Ta = 25°C ± 3°C
Parameter Symbol Conditions Min Typ Max Unit
Collector-emitter voltage (Base open) V
CEOIC
Base-emitter voltage V
Collector-base cutoff current (Emitter open)
Emitter-base cutoff current (Collector open)
1
Forward current transfer ratio
*
Collector-emitter saturation voltage V
I
CBO
I
EBO
h
CE(sat)IC
Transition frequency f
Collector output capacitance C
(Common base, input open circuited)
2
ON resistance
*
R
Note) 1. Measuring methods are based on JAPANESE INDUSTRIAL STANDARD JIS C 7030 measuring methods for transistors.
2.*1: Rank classification
Rank S T No rank
h
FE
500 to 1 500 800 to 2 500 500 to 2 500
Product of no-rank classification is not marked.
= 1 mA, IB = 020V
VCE = 2 V, IC = 4 mA 0.6 V
BE
VCB = 50 V, IE = 0 0.1 µA
VEB = 25 V, IC = 0 0.1 µA
VCE = 2 V, IC = 4 mA 500 2 500
FE
= 30 mA, IB = 3 mA 0.1 V
VCB = 6 V, IE = −4 mA, f = 200 MHz 80 MHz
T
VCB = 10 V, IE = 0, f = 1 MHz 7 pF
ob
on
2: Ron Measuremet circuit
*
IB = 1 mA
1.0 Ω
1 kΩ
f = 1 kHz
V = 0.3 V
V
V
V
V
B
A
0.4±0.2
Publication date: August 2004 SJC00313AED
= V
R
on
V
B
× 1 000 (Ω)
− V
A
B
1
Page 2
2SD1938(F)
This product complies with the RoHS Directive (EU 2002/95/EC).
PC T
250
a
)
200
mW
(
C
150
100
50
Collector power dissipation P
0
0
20
80
60
40
100
120 160140
Ambient temperature Ta (°C
V
I
/ IB = 10
I
C
CE(sat)
Ta = 85°C
0.1
)
V
(
CE(sat)
0.01
Collector-emitter saturation voltage V
0.001
1 10 100
C
−25°C
25°C
Collector current IC (mA
IC V
IB = 10 µA
hFE I
25°C
−25°C
CE
= 25°C
T
a
8 µA
6 µA
4 µA
2 µA
)
VCE (V
C
= 2 V
V
CE
1 000
100
90
80
)
A
70
(m
C
60
50
40
30
Collector current I
20
10
0
0 1.41.21.00.80.2 0.60.4
100
(pF)
ob
C
10
Collector output capacitance
(Common base, input open circuited)
1
0
)
18
16
)
14
A
(m
12
C
10
8
6
Collector current I
4
2
0
024681012
)
)
Collector-emitter voltage
1
600
400
1
Ta = 85°C
FE
1
200
000
1
800
600
400
Forward current transfer ratio h
200
0
10.1 10 100
Collector current IC (mA
IC V
BE
VCE = 2 V
Ta = 85°C
−25°C
25°C
Base-emitter voltage VBE (V
Cob V
510152025303540
CB
f = 1 MHz
= 25°C
T
a
Collector-base voltage VCB (V
)
)
2
SJC00313AED
Page 3
Request for your special attention and precautions in using the technical information and
semiconductors described in this book
(1)If any of the products or technical information described in this book is to be exported or provided to non-residents, the laws and
regulations of the exporting country, especially, those with regard to security export control, must be observed.
(2)The technical information described in this book is intended only to show the main characteristics and application circuit examples
of the products, and no license is granted under any intellectual property right or other right owned by our company or any other
company. Therefore, no responsibility is assumed by our company as to the infringement upon any such right owned by any other
company which may arise as a result of the use of technical information described in this book.
(3)The products described in this book are intended to be used for standard applications or general electronic equipment (such as office
equipment, communications equipment, measuring instruments and household appliances).
Consult our sales staff in advance for information on the following applications:
– Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support
systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body.
– Any applications other than the standard applications intended.
(4)The products and product specifications described in this book are subject to change without notice for modification and/or im-
provement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product
Standards in advance to make sure that the latest specifications satisfy your requirements.
(5)When designing your equipment, comply with the range of absolute maximum rating and the guaranteed operating conditions
(operating power supply voltage and operating environment etc.). Especially, please be careful not to exceed the range of absolute
maximum rating on the transient state, such as power-on, power-off and mode-switching. Otherwise, we will not be liable for any
defect which may arise later in your equipment.
Even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure
mode, possible to occur to semiconductor products. Measures on the systems such as redundant design, arresting the spread of fire
or preventing glitch are recommended in order to prevent physical injury, fire, social damages, for example, by using the products.
(6)Comply with the instructions for use in order to prevent breakdown and characteristics change due to external factors (ESD, EOS,
thermal stress and mechanical stress) at the time of handling, mounting or at customer's process. When using products for which
damp-proof packing is required, satisfy the conditions, such as shelf life and the elapsed time since first opening the packages.
(7)This book may be not reprinted or reproduced whether wholly or partially, without the prior written permission of Matsushita
Electric Industrial Co., Ltd.
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