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Features
• Epitaxial Die Construction
• Complementary NPN Types Available (BC847AT,BT,CT)
• Ultra-Small Surface Mount Package
• Lead Free/RoHS Compliant (Note 2)
• Qualified to AEC-Q101 Standards for High Reliability
• "Green" Device (Note 4 and 5)
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 Code: See Table Below & Diagram on Page 2
• Ordering & Date Code Information: See Page 2
• Weight: 0.002 grams (approximate)
BC857AT, BT, CT
PNP SMALL SIGNAL SURFACE MOUNT TRANSISTOR
A
C
TOP VIEW
B
K
J
E
G
H
D
Type Marking
BC857AT 3V
BC857BT 3W
BC857CT 3G
C
B
N
L
M
SOT-523
Dim Min Max Typ
A 0.15 0.30 0.22
B 0.75 0.85 0.80
C 1.45 1.75 1.60
D
⎯ ⎯
G 0.90 1.10 1.00
H 1.50 1.70 1.60
J 0.00 0.10 0.05
K 0.60 0.80 0.75
L 0.10 0.30 0.22
M 0.10 0.20 0.12
N 0.45 0.65 0.50
0° 8°
α
All Dimensi mm ons in
0.50
⎯
Maximum Ratings @T
= 25°C unless otherwise specified
A
Characteristic Symbol Value Unit
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current
Power Dissipation (Note 1)
Thermal Resistance, Junction to Ambient (Note 1)
Operating and Storage Temperature Range
Electrical Characteristics @T
= 25°C unless otherwise specified
A
V
V
V
R
Tj, T
CBO
CEO
EBO
IC
Pd
JA
θ
STG
-50 V
-45 V
-5.0 V
-100 mA
150 mW
833 °C/W
-55 to +150 °C
Characteristic Symbol Min Typ Max Unit Test Condition
Collector-Base Breakdown Voltage (Note 3)
Collector-Emitter Breakdown Voltage (Note 3)
Emitter-Base Breakdown Voltage (Note 3)
DC Current Gain (Note 3) Current Gain A
B
C
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
V
(BR)CBO
V
(BR)CEO
V
(BR)EBO
hFE
V
CE(SAT)
V
BE(SAT)
V
BE(ON)
I
CBO
COB
fT
-50 — — V
-45 — — V
-5 — — V
125
220
420
—
— — -700
-600
—
—
—
—
290
520
— — -300
-650
-900 — —
— — -750
-820
— — -15
100 — — MHz
— — 4.5 pF
250
475
800
-4.0
IC = 10μA, IB = 0
IC = 10mA, IB = 0
IE = 1μA, IC = 0
—
VCE = -5.0V, IC = -2.0mA
IC = -10mA, IB = -0.5mA
mV
IC = -100mA, IB = -5.0mA
IC = -10mA, IB = -0.5mA
mV
IC = -100mA, IB = -5.0mA
VCE = -5.0V, IC = -2.0mA
mV
VCE = -5.0V, IC = -10mA
VCB = -30V
NA
µA
VCB = -30V, TA = 150°C
VCE = -5.0V, IC = -10mA, f = 100MHz
VCB = -10V, f = 1.0MHz
IC = -0.2mA, VCE = -5.0Vdc,
Noise Figure NF — — 10 dB
RS = 2.0KΩ, f = 1.0KHz,
BW = 200Hz
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
Code UO are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants.
DS30275 Rev. 9 - 2
can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
2. No purposefully added lead
3. Short duration pulse test used to minimize self-heating effect.
4. Diodes Inc.'s "Green" policy can be found on our website at http://www.diodes.com/products/lead_free/index.php.
5. Product manufactured with Date Code UO (week 40, 2007) and newer are built with Green Molding Compound. Product manufactured prior to Date
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© Diodes Incorporated
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P, P
O
R
PATIO
C
O
CTO
R
T
O
T
TER
G
T
H PRODUCT
H
C CUR
REN
T GAIN
250
200
0.5
0.4
I
C
= 10
I
B
N (mW)
150
DISSI
100
WE
D
1,000
100
50
0
0
25 50
T , AMBIENT TEMPERATURE (°C)
A
75
100 125
Fig. 1, Max Power Dissipation vs.
Ambient Temperatur e
T = 150°C
A
T = 25°C
A
T = -50°C
A
150
175
V = 5V
CE
200
EMI
0.3
T = 25°C
0.2
LLE
SATURATION VO LTAGE ( V)
0.1
CE(SAT)
V,
T = 150°C
A
A
T = -50°C
A
0
10.1
I , COLLECTOR CURRENT (mA)
C
10
100
1,000
Fig. 2, Collector Emitter Saturation Voltage
vs. Collect or Current
1,000
V = 5V
z)
CE
(M
100
10
FE
h, D
AIN BANDWID
t
f,
1
1
10 100
I , COLLECTOR CURRENT (mA)
C
Fig. 3, DC Current Gain vs. Collector Current
1,000
10
1
I , COLLECTOR CURRENT (mA)
C
10
Fig. 4, Gain Bandwidth Product vs. Collector Current
Ordering Information (Note 6)
Device
BC857AT-7-F
BC857BT-7-F
BC857CT-7-F
Notes: 6. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Packaging Shipping
SOT-523 3000/Tape & Reel
SOT-523 3000/Tape & Reel
SOT-523 3000/Tape & Reel
Marking Information
XXYM
Date Code Key
Year 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Code J K L M N P R S T U V W X Y Z
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Code 1 2 3 4 5 6 7 8 9 O N D
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)
100
DS30275 Rev. 9 - 2
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© Diodes Incorporated
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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.
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written
approval of the President of Diodes Incorporated.
IMPORTANT NOTICE
LIFE SUPPORT
DS30275 Rev. 9 - 2
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BC857AT, BT, CT
© Diodes Incorporated
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