BC857BS
Datasheet Number DS30373 Rev. 7 - 2 1 of 4
www.diodes.com January 2012
© Diodes Incorporated
BC857BS
DUAL PNP SMALL SIGNAL SURFACE MOUNT TRANSISTOR
Features
Ideally Suited for Automated Insertion
For Switching and AF Amplifier Applications
Ultra-Small Surface Mount Package
“Lead-Free”, RoHS Compliant (Note 1)
"Green" Device (Note 2)
Qualified to AEC-Q101 Standards for High Reliability
Mechanical Data
Case: SOT363
Case Material: Molded Plastic, "Green" Molding
Compound. UL Flammability Classification Rating 94V-0
Moisture Sensitivity: Level 1 per J-STD-020
Terminals: Matte Tin Finish; Solderable per MIL-STD-202,
Method 208
Weight: 0.006 grams (approximate)
Ordering Information (Notes 3 & 4)
Product Grade Marking Reel size (inches) Tape width (mm) Quantity per reel
BC857BS-7-F Commercial K3W 7 8 3,000
BC857BS-13-F Commercial K3W 13 8 10,000
BC857BSQ-7-F Automotive K3W 7 8 3,000
Notes: 1. No purposefully added lead.
2. Halogen and Antimony Free. Diodes Inc's "Green" policy can be found on our website at http://www.diodes.com
3. For packaging details, go to our website at http://www.diodes.com.
4. Products with Q-suffix are automotive grade. All other products are commercial grade.
Marking Information
Date Code Key
Year 2010 2011 2012 2013 2014 2015 2016 2017
Code X Y Z A B C D E
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
Bottom View
SOT363
Pin-Out Top View
Device Symbol
K3W YM
K3W YM
K3W = Product Type Marking Code
YM = Date Code Marking
Y = Year (ex: X = 2010)
M = Month (ex: 9 = September)
BC857BS
Datasheet Number DS30373 Rev. 7 - 2 2 of 4
www.diodes.com January 2012
© Diodes Incorporated
BC857BS
Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Collector-Base Voltage VCBO -50 V
Collector-Emitter Voltage VCEO -45 V
Emitter-Base Voltage VEBO -5.0 V
Collector Current IC -100 mA
Peak Collector Current ICM -200 mA
Peak Base Current IBM -200 mA
Thermal Characteristics @TA = 25°C unless otherwise specified
Characteristic Symbol Value Unit
Power Dissipation (Note 5) PD 200 mW
Thermal Resistance, Junction to Ambient Air (Note 5) R
θ
JA 625 °C/W
Operating and Storage Temperature Range TJ, TSTG -55 to +150 °C
Electrical Characteristics @TA = 25°C unless otherwise specified
Characteristic (Note 6) Symbol Min Typ Max Unit Test Condition
Collector-Base Breakdown Voltage BVCBO -50 — V
IC = 100μA, IB = 0
Collector-Emitter Breakdown Voltage BVCEO -45 — V
IC = 10mA, IB = 0
Emitter-Base Breakdown Voltage BVEBO -5 — V
IE = 100μA, IC = 0
DC Current Gain hFE 220 — 475 —
VCE = -5.0V, IC = -2.0mA
Collector-Emitter Saturation Voltage VCE(sat) — —
-100
-400 mV IC = -10mA, IB = -0.5mA
IC = -100mA, IB = -5.0mA
Base-Emitter Saturation Voltage VBE
(
sat
)
— -700 — mV
IC = -10mA, IB = -0.5mA
Base-Emitter Voltage VBE
(
on
)
-580 -665 -750 mV
VCE = -5.0V, IC = -2.0mA
Collector-Cutoff Current ICBO
-15
-4.0 nA
µA VCB = -30V
VCB = -30V, TA = 150°C
Emitter Cutoff Current ICEO — — -100 nA
VEB = -5.0V, IC = 0
Gain Bandwidth Product fT 100 — MHz
VCE = -5.0V, IC = -10mA,
f = 100MHz
Collector-Base Capacitance CCBO — — 3 pF
VCB = -10V, f = 1.0MHz
Emitter-Base Capacitance CEBO — 11 — pF
VEB = -0.5V, f = 1.0MHz
Notes: 5. Device mounted on FR-4 PCB. Diodes Inc. sugge sted pad lay out do cument can be found on our website at http://www.diodes.com
6. Short duration pulse test used to minimize self-heating effect.
BC857BS
Datasheet Number DS30373 Rev. 7 - 2 3 of 4
www.diodes.com January 2012
© Diodes Incorporated
BC857BS
0
50
100
150
200
250
0100200
P
,
P
O
WE
R
DISSI
P
A
T
I
O
N (mW)
D
T , AMBIENT TEMPERAT URE ( C)
Fi g. 1 Pow er D issipation vs . A m bient Tem pe r ature
A
°
1
10
100
1,000
10 100
1
h D
C
C
U
R
R
EN
T
G
AIN
FE,
I , COLLECTOR CURRENT (mA)
Fig. 2 Typical DC Current Gain vs. Collector Current
C
0
0.1
0.2
0.3
0.4
0.5
0.1 110
100 1,000
V,
C
O
LLE
C
T
O
R
-EMI
T
T
E
R
SATURATION VOLTAGE (V)
CE
I , COLLECTOR CURRENT (mA)
Fig. 3 Typical Collector-Emitter Saturation Voltage
vs. C ollecto r Cu r r ent
C
10
100
1,000
110100
f,
G
AIN-BANDWID
T
H
P
R
O
D
U
C
T
(M
H
z)
T
I , COLLECTOR CURRENT (mA)
Fig. 4 Typical Gain-Bandwidth Product vs. Collector Current
C
Package Outline Dimensions
SOT363
Dim Min Max
A 0.10 0.30
B 1.15 1.35
C 2.00 2.20
D 0.65 Typ
F 0.40 0.45
H 1.80 2.20
J 0 0.10
K 0.90 1.00
L 0.25 0.40
M 0.10 0.22
α 0° 8°
All Dimensions in mm
A
M
JL
D
B C
H
K
F
BC857BS
Datasheet Number DS30373 Rev. 7 - 2 4 of 4
www.diodes.com January 2012
© Diodes Incorporated
BC857BS
Suggested Pad Layout
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein 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 Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated p roducts for any unintended or una uthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign p atents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their pro ducts and an y
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2012, Diodes Incorporated
www.diodes.com
Dimensions Value (in mm)
Z 2.5
G 1.3
X 0.42
Y 0.6
C1 1.9
C2 0.65
X
Z
Y
C1
C2
C2
G