MJE521
SILICON NPN TRANSISTOR
s
SGS-THOMSON PREFERRED SALESTYPE
DESCRIPTION
The MJE521 is a silicon epitaxial-base NPN
transistor in Jedec SOT-32 plastic package,
intended for use in 5 to 20W audio amplifiers,
general purpose amplifier and switching circuits.
INTERNAL SCHEMATIC DIAGRAM
June 1997
3
2
1
SOT-32
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
CBO
Collector-Base Voltage (I
E
= 0)
40
V
V
CEO
Collector-Emitter Voltage (I
B
= 0)
40
V
V
EBO
Emitter-Base Voltage (I
C
= 0)
4
V
I
C
Collector Current
4
A
I
CM
Collector Peak Current
8
A
I
B
Base Current
2
A
P
tot
Total Dissipation at Tc
25
o
C
40
W
T
stg
Storage Temperature
-65 to +150
o
C
T
j
Max. Operating Junction Temperature
150
o
C
1/4
THERMAL DATA
R
thj-amb
Thermal Resistance Junction-ambient Max
3.12
o
C/W
ELECTRICAL CHARACTERISTICS (T
case
= 25
o
C unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
CBO
Collector Cut-off
Current (I
E
= 0)
V
CB
= 40 V
100
A
I
EBO
Emitter Cut-off Current
(I
C
= 0)
V
EB
= 4 V
100
A
V
CEO(sus)
Collector-Emitter
Sustaining Voltage
(I
B
= 0)
I
C
= 0.1 A
40
V
h
FE
DC Current Gain
I
C
= 1 A V
CE
= 1 V
40
Pulsed: Pulse duration = 300
s, duty cycle
1.5%
MJE521
2/4
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
7.4
7.8
0.291
0.307
B
10.5
10.8
0.413
0.445
b
0.7
0.9
0.028
0.035
b1
0.49
0.75
0.019
0.030
C
2.4
2.7
0.040
0.106
c1
1.0
1.3
0.039
0.050
D
15.4
16.0
0.606
0.629
e
2.2
0.087
e3
4.15
4.65
0.163
0.183
F
3.8
0.150
G
3
3.2
0.118
0.126
H
2.54
0.100
H2
2.15
0.084
H2
0016114
SOT-32 (TO-126) MECHANICAL DATA
MJE521
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Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
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. . .
MJE521
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