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■ SGS-THOMS O N PREF ERRE D SA LES TYP E
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.
MJE521
SILI CON NPN TRANSISTOR
1
2
3
SOT-32
INTERNAL SCHEMATIC DIAGRAM
ABSOL UT E MAXIMU M RATINGS
Symbol Parameter Value Unit
V
V
V
I
P
T
Collector-Base Voltage (IE = 0) 40 V
CBO
Collector-Emitter Voltage (IB = 0) 40 V
CEO
Emitter-Base Voltage (IC = 0) 4 V
EBO
I
Collector Current 4 A
C
Collector Peak Current 8 A
CM
I
Base Current 2 A
B
Total Dissipation at Tc ≤ 25 oC40W
tot
Storage Temperature -65 to +150
stg
T
Max. Operating Junction Temperature 150
j
o
C
o
C
June 1997
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MJE521
THERMAL DATA
R
thj-amb
Thermal Resistance Junction-ambient Max 3.12
o
C/W
ELECTRICAL CHARACTERISTICS (T
= 25 oC unless otherwise specified)
case
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
CBO
I
EBO
V
CEO(sus)
Collector Cut-off
Current (I
= 0)
E
Emitter Cut-off Current
(I
= 0)
C
∗ Collector-Emitter
= 40 V 100 µA
V
CB
= 4 V 100 µA
V
EB
I
= 0.1 A 40 V
C
Sustaining Voltage
(I
= 0)
B
h
∗ Pulsed: Pulse duration = 300µs, duty cycle ≤ 1.5%
DC Current Gain IC = 1 A VCE = 1 V 40
FE
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SOT-32 (TO-126) MECHANICAL DATA
MJE521
DIM.
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
e2.2 0.087
e3 4.15 4.65 0.163 0.183
F3.8 0.150
G 3 3.2 0.118 0.126
H2.540.100
H2 2.15 0.084
mm inch
H2
0016114
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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 ot he rwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificati ons 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 wi thout express
written approval of SGS-THOMSON Microelectonics.
© 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
SGS-THOMSON Microelectronics GROUP OF COMPANIES
. . .
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