2N3903, 2N3904
2N3903 is a Preferred Device

General Purpose
Transistors
NPN Silicon
Features

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• Pb−Free Package May be Available. The G−Suffix Denotes a
Pb−Free Lead Finish
MAXIMUM RATINGS
Rating

Symbol

Value

Unit

Collector −Emitter Voltage

VCEO

40

Vdc

Collector −Base Voltage

VCBO

60

Vdc

Emitter −Base Voltage

VEBO

6.0

Vdc

Collector Current − Continuous

IC

200

mAdc

Total Device Dissipation
@ TA = 25°C
Derate above 25°C

PD

Total Device Dissipation
@ TC = 25°C
Derate above 25°C

PD

Operating and Storage Junction
Temperature Range

TJ, Tstg

625
5.0

mW
mW/°C

1.5
12

W
mW/°C

−55 to
+150

°C

TO−92
CASE 29
STYLE 1

1
2
3

MARKING DIAGRAMS
2N
3903
YWW

Y
WW

2N
3904
YWW

= Year
= Work Week

ORDERING INFORMATION

THERMAL CHARACTERISTICS (Note 1)
Symbol

Max

Unit

Thermal Resistance,
Junction−to−Ambient

RθJA

200

°C/W

Thermal Resistance,
Junction−to−Case

RθJC

83.3

°C/W

Characteristic

1. Indicates Data in addition to JEDEC Requirements.

COLLECTOR
3
2
BASE
1
EMITTER
STYLE 1

Package

Shipping†

2N3903

TO−92

5000 Units/Box

2N3903RLRM

TO−92

2000/Ammo Pack

2N3904

TO−92

5000 Units/Box

2N3904RLRA

TO−92

2000/Tape & Reel

2N3904RLRE

TO−92

2000/Tape & Reel

2N3904RLRM

TO−92

2000/Ammo Pack

2N3904RLRMG

TO−92

2000/Ammo Pack

2N3904RLRP

TO−92

2000/Ammo Pack

2N3904RL1

TO−92

2000/Tape & Reel

2N3904ZL1

TO−92

2000/Ammo Pack

Device

†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.

*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
Preferred devices are recommended choices for future use
and best overall value.
 Semiconductor Components Industries, LLC, 2003

December, 2003 − Rev. 4

1

Publication Order Number:
2N3903/D

2N3903, 2N3904
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Characteristic

Symbol

Min

Max

Unit

Collector −Emitter Breakdown Voltage (Note 2) (IC = 1.0 mAdc, IB = 0)

V(BR)CEO

40

−

Vdc

Collector −Base Breakdown Voltage (IC = 10 Adc, IE = 0)

V(BR)CBO

60

−

Vdc

Emitter −Base Breakdown Voltage (IE = 10 Adc, IC = 0)

V(BR)EBO

6.0

−

Vdc

IBL

−

50

nAdc

ICEX

−

50

nAdc

20
40
35
70
50
100
30
60
15
30

−
−
−
−
150
300
−
−
−
−

−
−

0.2
0.3

0.65
−

0.85
0.95

250
300

−
−

OFF CHARACTERISTICS

Base Cutoff Current (VCE = 30 Vdc, VEB = 3.0 Vdc)
Collector Cutoff Current (VCE = 30 Vdc, VEB = 3.0 Vdc)
ON CHARACTERISTICS

hFE

DC Current Gain (Note 2)
(IC = 0.1 mAdc, VCE = 1.0 Vdc)

2N3903
2N3904
2N3903
2N3904
2N3903
2N3904
2N3903
2N3904
2N3903
2N3904

(IC = 1.0 mAdc, VCE = 1.0 Vdc)
(IC = 10 mAdc, VCE = 1.0 Vdc)
(IC = 50 mAdc, VCE = 1.0 Vdc)
(IC = 100 mAdc, VCE = 1.0 Vdc)
Collector −Emitter Saturation Voltage (Note 2)
(IC = 10 mAdc, IB = 1.0 mAdc)
(IC = 50 mAdc, IB = 5.0 mAdc

VCE(sat)

Base −Emitter Saturation Voltage (Note 2)
(IC = 10 mAdc, IB = 1.0 mAdc)
(IC = 50 mAdc, IB = 5.0 mAdc)

VBE(sat)

−

Vdc

Vdc

SMALL−SIGNAL CHARACTERISTICS
Current −Gain − Bandwidth Product
(IC = 10 mAdc, VCE = 20 Vdc, f = 100 MHz)

fT
2N3903
2N3904

MHz

Output Capacitance (VCB = 5.0 Vdc, IE = 0, f = 1.0 MHz)

Cobo

−

4.0

pF

Input Capacitance (VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz)

Cibo

−

8.0

pF

1.0
1.0

8.0
10

0.1
0.5

5.0
8.0

50
100

200
400

1.0

40

−
−

6.0
5.0

td

−

35

ns

tr

−

35

ns

ts

−
−

175
200

ns

tf

−

50

ns

Input Impedance
(IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz)

kΩ

hie
2N3903
2N3904

Voltage Feedback Ratio
(IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz)

X 10− 4

hre
2N3903
2N3904

Small−Signal Current Gain
(IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz)

hfe
2N3903
2N3904

Output Admittance (IC = 1.0 mAdc, VCE = 10 Vdc, f = 1.0 kHz)

hoe

Noise Figure
(IC = 100 Adc, VCE = 5.0 Vdc, RS = 1.0 k Ω, f = 1.0 kHz)

−

NF
2N3903
2N3904

mhos
dB

SWITCHING CHARACTERISTICS
Delay Time
Rise Time
Storage Time

(VCC = 3.0 Vdc, VBE = 0.5 Vdc,
IC = 10 mAdc, IB1 = 1.0 mAdc)
(VCC = 3.0 Vdc, IC = 10 mAdc,
IB1 = IB2 = 1.0 mAdc)

2N3903
2N3904

Fall Time
2. Pulse Test: Pulse Width 
 300 s; Duty Cycle 
 2%.

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2

2N3903, 2N3904
DUTY CYCLE = 2%
300 ns

+3 V
+10.9 V

10 < t1 < 500 s
275

t1

DUTY CYCLE = 2%

10 k

+3 V
+10.9 V
275
10 k

0

−
0.5 V

CS < 4 pF*

< 1 ns

1N916
−
9.1 V′

< 1 ns

* Total shunt capacitance of test jig and connectors

Figure 1. Delay and Rise Time
Equivalent Test Circuit

Figure 2. Storage and Fall Time
Equivalent Test Circuit

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3

CS < 4 pF*

2N3903, 2N3904
TYPICAL TRANSIENT CHARACTERISTICS
TJ = 25°C
TJ = 125°C
10

5000
2000

5.0

Q, CHARGE (pC)

CAPACITANCE (pF)

VCC = 40 V
IC/IB = 10

3000

7.0

Cibo
3.0

1000
700
500

Cobo

2.0

QT

300
200

QA

1.0
0.1

0.2 0.3

0.5 0.7 1.0

2.0 3.0

5.0 7.0 10

100
70
50

20 30 40

30

50 70 100

200

500
IC/IB = 10

t r, RISE TIME (ns)

100
70

tr @ VCC = 3.0 V

50
30
20

40 V
15 V

1.0

2.0 3.0

5.0 7.0 10

20

30

50 70 100

50
30
20

7
5

200

5.0 7.0 10

20

30

50 70 100

Figure 5. Turn −On Time

Figure 6. Rise Time

IC/IB = 10

IC/IB = 10

IC/IB = 20
100
70
50

10

7
5

7
5

20

30

50 70 100

200

IC/IB = 10

30
20

10

5.0 7.0 10

VCC = 40 V
IB1 = IB2

300
200

IC/IB = 20

30
20

200

500

t′s = ts − 1/8 tf
IB1 = IB2

50

2.0 3.0

2.0 3.0

IC, COLLECTOR CURRENT (mA)

100
70

1.0

1.0

IC, COLLECTOR CURRENT (mA)

500
IC/IB = 20

100
70

10

2.0 V

td @ VOB = 0 V

VCC = 40 V
IC/IB = 10

300
200

t f , FALL TIME (ns)

TIME (ns)

20

Figure 4. Charge Data

10

t s′ , STORAGE TIME (ns)

5.0 7.0 10

Figure 3. Capacitance

300
200

300
200

2.0 3.0

IC, COLLECTOR CURRENT (mA)

500

7
5

1.0

REVERSE BIAS VOLTAGE (VOLTS)

1.0

2.0 3.0

5.0 7.0 10

20

30

50 70 100

IC, COLLECTOR CURRENT (mA)

IC, COLLECTOR CURRENT (mA)

Figure 7. Storage Time

Figure 8. Fall Time

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4

200

2N3903, 2N3904
TYPICAL AUDIO SMALL−SIGNAL CHARACTERISTICS
NOISE FIGURE VARIATIONS
(VCE = 5.0 Vdc, TA = 25°C, Bandwidth = 1.0 Hz)
12

f = 1.0 kHz

SOURCE RESISTANCE = 200 

IC = 0.5 mA

8
6

SOURCE RESISTANCE = 1.0 k
IC = 50 A

4
SOURCE RESISTANCE = 500 

IC = 100 A

2
0
0.1

0.2

0.4

1.0

2.0

IC = 1.0 mA

12
NF, NOISE FIGURE (dB)

10
NF, NOISE FIGURE (dB)

14

SOURCE RESISTANCE = 200 

IC = 1.0 mA

IC = 0.5 mA

10

IC = 50 A

8
IC = 100 A

6
4
2

4.0

10

20

40

0

100

0.1

0.2

0.4

1.0

2.0

4.0

10

20

f, FREQUENCY (kHz)

RS, SOURCE RESISTANCE (k OHMS)

Figure 9.

Figure 10.

40

100

5.0

10

5.0

10

h PARAMETERS
(VCE = 10 Vdc, f = 1.0 kHz, TA = 25°C)
100
hoe, OUTPUT ADMITTANCE ( mhos)

h fe , CURRENT GAIN

300

200

100
70
50

30

0.1

0.2

0.3
0.5
1.0
2.0 3.0
IC, COLLECTOR CURRENT (mA)

5.0

50
20
10
5
2
1

10

0.1

0.2

Figure 11. Current Gain

Figure 12. Output Admittance

h re , VOLTAGE FEEDBACK RATIO (X 10 −4 )

h ie , INPUT IMPEDANCE (k OHMS)

20
10
5.0

2.0
1.0
0.5
0.2

0.1

0.2

0.3
0.5
1.0
2.0 3.0
IC, COLLECTOR CURRENT (mA)

0.3
0.5
1.0
2.0 3.0
IC, COLLECTOR CURRENT (mA)

5.0

10
7.0
5.0
3.0
2.0

1.0
0.7
0.5

10

0.1

Figure 13. Input Impedance

0.2

0.3
0.5
1.0
2.0 3.0
IC, COLLECTOR CURRENT (mA)

Figure 14. Voltage Feedback Ratio

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5

2N3903, 2N3904

h FE, DC CURRENT GAIN (NORMALIZED)

TYPICAL STATIC CHARACTERISTICS
2.0
TJ = +125°C

VCE = 1.0 V

+25°C

1.0
0.7

−
55 °C

0.5
0.3
0.2

0.1
0.1

0.2

0.3

0.5

0.7

1.0

2.0

3.0

5.0

7.0

10

20

30

70

50

100

200

IC, COLLECTOR CURRENT (mA)

VCE, COLLECTOR EMITTER VOLTAGE (VOLTS)

Figure 15. DC Current Gain

1.0
TJ = 25°C
0.8

IC = 1.0 mA

10 mA

30 mA

100 mA

0.6
0.4

0.2
0
0.01

0.02

0.03

0.05

0.07

0.2

0.1

0.3

0.5

0.7

1.0

2.0

3.0

5.0

7.0

10

IB, BASE CURRENT (mA)

Figure 16. Collector Saturation Region
1.0

1.2
TJ = 25°C
VBE(sat) @ IC/IB =10

0.8
VBE @ VCE =1.0 V
0.6
0.4
VCE(sat) @ IC/IB =10

VC FOR VCE(sat)
0

−
55 °C TO +25°C

−
0.5
−
55 °C TO +25°C
−
1.0
+25°C TO +125°C

0.2
0

+25°C TO +125°C

0.5
COEFFICIENT (mV/ °C)

V, VOLTAGE (VOLTS)

1.0

VB FOR VBE(sat)

−
1.5

1.0

2.0

5.0

10

20

50

100

−
2.0

200

0

20

40

60

80

100

120

140

160

IC, COLLECTOR CURRENT (mA)

IC, COLLECTOR CURRENT (mA)

Figure 17. “ON” Voltages

Figure 18. Temperature Coefficients

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6

180 200

2N3903, 2N3904
PACKAGE DIMENSIONS
TO−92
TO−226AA
CASE 29−11
ISSUE AL
A

B

R
P

NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. LEAD DIMENSION IS UNCONTROLLED IN P AND
BEYOND DIMENSION K MINIMUM.

L
SEATING
PLANE

K

DIM
A
B
C
D
G
H
J
K
L
N
P
R
V

D

X X
G

J

H
V

C
SECTION X−X

1

N
N

INCHES
MIN
MAX
0.175
0.205
0.170
0.210
0.125
0.165
0.016
0.021
0.045
0.055
0.095
0.105
0.015
0.020
0.500
−−−
0.250
−−−
0.080
0.105
−−−
0.100
0.115
−−−
0.135
−−−

STYLE 1:
PIN 1. EMITTER
2. BASE
3. COLLECTOR

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7

MILLIMETERS
MIN
MAX
4.45
5.20
4.32
5.33
3.18
4.19
0.407
0.533
1.15
1.39
2.42
2.66
0.39
0.50
12.70
−−−
6.35
−−−
2.04
2.66
−−−
2.54
2.93
−−−
3.43
−−−
STYLE 14:
PIN 1. EMITTER
2. COLLECTOR
3. BASE

2N3903, 2N3904

ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

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For additional information, please contact your
local Sales Representative.

2N3903/D