Qualified to AEC-Q101 Standards for High Reliability
TOP VIEW
B C
E
G
H
K
M
A
C
SOT-523
Dim
A
B
C
D
G
H
J
K
L
D
L
Min
0.15
0.75
1.45
¾
0.90
1.50
0.00
0.60
0.10
0.10
0.45
0°
Max
0.30
0.85
1.75
¾
1.10
1.70
0.10
0.80
0.30
0.20
0.65
8°
Typ
0.22
0.80
1.60
0.50
1.00
1.60
0.05
0.75
0.22
0.12
0.50
¾
Mechanical Data
·
·
·
·
·
·
·
·
·
Case: SOT-523
Case Material: Molded Plastic. UL Flammability
Classification Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020C
Terminals: Solderable per MIL-STD-202, Method 208
Lead Free Plating (Matte Tin Finish annealed over Alloy 42
leadframe).
Terminal Connections: See Diagram
Marking Codes (See Table Below & Diagrams on Page 2)
Ordering & Date Code Information: See Page 2
Weight: 0.002 grams (approximate)
J
B
M
N
a
All Dimensions in mm
Type
BC857AT
BC857BT
BC857CT
Marking
3V
3W
3G
Maximum Ratings
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current
Power Dissipation (Note 1)
@ T
A
= 25°C unless otherwise specified
Symbol
V
CBO
V
CEO
V
EBO
I
C
P
d
R
qJA
T
j
, T
STG
Value
-50
-45
-5.0
-100
150
833
-55 to +150
Unit
V
V
V
mA
mW
°C/W
°C
Characteristic
Thermal Resistance, Junction to Ambient (Note 1)
Operating and Storage Temperature Range
Notes:
1. Device mounted on FR-4 PCB, 1 inch x 0.85 inch x 0.062 inch; pad layout as shown on Diodes Inc. suggested pad layout
document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
2. No purposefully added lead.
DS30275 Rev. 8 - 2
1 of 3
www.diodes.com
BC857AT, BT, CT
ã
Diodes Incorporated
Electrical Characteristics
Characteristic
@ T
A
= 25°C unless otherwise specified
Symbol
V
(BR)CBO
V
(BR)CEO
V
(BR)EBO
Current Gain A
B
C
h
FE
V
CE(SAT)
V
BE(SAT)
V
BE(ON)
I
CBO
f
T
C
OB
NF
Min
-50
-45
-5
125
220
420
—
—
—
-600
—
—
—
100
—
—
Typ
—
—
—
—
290
520
—
—
-700
-900
—
—
—
—
—
—
—
Max
—
—
—
250
475
800
-300
-650
—
—
-750
-820
-15
-4.0
—
4.5
10
Unit
V
V
V
—
mV
mV
mV
NA
µA
MHz
pF
dB
Test Condition
I
C
= 10mA, I
B
= 0
I
C
= 10mA, I
B
= 0
I
E
= 1mA, I
C
= 0
V
CE
= -5.0V, I
C
= -2.0mA
I
C
= -10mA, I
B
= -0.5mA
I
C
= -100mA, I
B
= -5.0mA
I
C
= -10mA, I
B
= -0.5mA
I
C
= -100mA, I
B
= -5.0mA
V
CE
= -5.0V, I
C
= -2.0mA
V
CE
= -5.0V, I
C
= -10mA
V
CB
= -30V
V
CB
= -30V, T
A
= 150°C
V
CE
= -5.0V, I
C
= -10mA,
f = 100MHz
V
CB
= -10V, f = 1.0MHz
I
C
= -0.2mA, V
CE
= -5.0Vdc,
R
S
= 2.0KW, f = 1.0KHz,
BW = 200Hz
Collector-Base Breakdown Voltage (Note 3)
Collector-Emitter Breakdown Voltage (Note 3)
Emitter-Base Breakdown Voltage (Note 3)
DC Current Gain (Note 3)
Collector-Emitter Saturation Voltage (Note 3)
Base-Emitter Saturation Voltage (Note 3)
Base-Emitter Voltage (Note 3)
Collector-Cutoff Current (Note 3)
Gain Bandwidth Product
Output Capacitance
Noise Figure
Notes:
3. Short duration pulse test used to minimize self-heating effect.
Ordering Information
Device
BC857AT-7-F
BC857BT-7-F
BC857CT-7-F
Notes:
(Note 4)
Packaging
SOT-523
SOT-523
SOT-523
Shipping
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
4. For Packaging Details: go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
XXYM
Date Code Key
Year
Code
1998
J
Month
Code
1999
K
Jan
1
2000
L
2001
M
Feb
2
2002
N
March
3
2003
P
Apr
4
XX = Product Type Marking Code (See Page 1), e.g. 3V = BC857AT
YM = Date Code Marking
Y = Year (ex: N = 2002)
M = Month (ex: 9 = September)
2004
R
May
5
2005
S
Jun
6
2006
T
Jul
7
2007
U
Aug
8
2008
V
Sep
9
2009
W
Oct
O
2010
X
2011
Y
Nov
N
2012
Z
Dec
D
DS30275 Rev. 8 - 2
2 of 3
www.diodes.com
BC857AT, BT, CT
250
P
D
, POWER DISSIPATION (mW)
0.5
V
CE(SAT)
, COLLECTOR TO EMITTER
SATURATION VOLTAGE (V)
I
C
I
B
= 10
200
0.4
150
0.3
100
0.2
T
A
= 25°C
T
A
= 150°C
50
0.1
T
A
= -50°C
0
0.1
1
10
100
1000
0
0
25
50
75
100
125
150
175
200
T
A
, AMBIENT TEMPERATURE (°C)
Fig. 1, Max Power Dissipation vs
Ambient Temperature
1000
T
A
= 150°C
I
C
, COLLECTOR CURRENT (mA)
Fig. 2 Collector Emitter Saturation Voltage
vs. Collector Current
1000
f
t
, GAIN BANDWIDTH PRODUCT (MHz)
V
CE
= 5V
V
CE
= 5V
h
FE
, DC CURRENT GAIN
100
T
A
= 25°C
T
A
= -50°C
100
10
1
1
10
100
1000
I
C
, COLLECTOR CURRENT (mA)
Fig. 3, DC Current Gain vs. Collector Current
10
1
10
100
I
C
, COLLECTOR CURRENT (mA)
Fig. 4, Gain Bandwidth Product vs Collector Current
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
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