Page 1
Features
• Fast Switching Speed
• Surface Mount Package Ideally Suited for Automated Insertion
• For General Purpose Switching Applications
• High Conductance
• Lead, Halogen and Antimony Free, RoHS Compliant
“Green” Device (Notes 1 and 2)
• Qualified to AEC-Q101 Standards for High Reliability
SOT23
Top View
BAS19 / BAS20 / BAS21
SURFACE MOUNT FAST SWITCHING DIODE
Mechanical Data
• Case: SOT23
• Case Material: Molded Plastic. UL Flammability Classification
Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020
• Terminals: Solderable per MIL-STD-202, Method 208
• Lead Free Plating (Matte Tin Finish annealed over Alloy 42
leadframe).
• Polarity: See Diagram
• Weight: 0.008 grams (approximate)
Top View
Internal Schematic
Ordering Information (Note 3)
Part Number Qualification Case Packaging
BAS19-7-F Commercial SOT23 3,000/Tape & Reel
BAS20-7-F Commercial SOT23 3,000/Tape & Reel
BAS20-13-F Commercial SOT23 10,000/Tape & Reel
BAS20Q-13-F Automotive SOT23 10,000/Tape & Reel
BAS21-7-F Commercial SOT23 3,000/Tape & Reel
BAS21Q-7-F Automotive SOT23 3,000/Tape & Reel
BAS21-13-F Commercial SOT23 10,000/Tape & Reel
BAS21Q-13-F Automotive SOT23 10,000/Tape & Reel
Notes: 1. No purposefully added lead. Halogen and Antimony Free.
3. For packaging details, go to our website at http://www.diodes.com.
2. Product manufactured with Data Code V9 (week 33, 2008) and newer are built with Green Molding Compound. Product manufactured prior to Date
Code V9 are built with Non-Green Molding Compound and may contain Halogens or Sb
Fire Retardants.
2O3
Marking Information
Date Code Key
Year 2000 2001 2002 ….. 2009 2010 2011 2012 2013 2014 2015 2016 2017
Code L M N ….. W 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
KXX
YM
KXX = Product Type Marking Code
BAS19 Marking: KA8, KT3; KT2
BAS20 Marking: KT2, KT3
BAS21 Marking: KT3
YM = Date Code Marking
Y = Year (ex: Y = 2011)
M = Month (ex: 9 = September)
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 21 - 2
1 of 4
www.diodes.com
November 2011
© Diodes Incorporated
Page 2
)
θ
P, P
O
R
PATIO
NST
N
T
N
O
US F
O
R
R
C
U
R
R
N
T
Maximum Ratings @T
= 25°C unless otherwise specified
A
Characteristic Symbol BAS19 BAS20 BAS21 Unit
Repetitive Peak Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
RMS Reverse Voltage
Forward Continuous Current (Note 4)
Average Rectified Output Current (Note 4)
Non-Repetitive Peak Forward Surge Current @ t = 1.0μs
@ t = 1.0s
Repetitive Peak Forward Surge Current (Note 4)
Thermal Characteristics
Characteristic Symbol Value Unit
Power Dissipation (Note 4)
Thermal Resistance Junction to Ambient Air (Note 4)
Operating and Storage Temperature Range
V
V
V
R(RMS
I
I
RRM
RWM
V
I
FM
I
O
FSM
FRM
R
TJ , T
BAS19 / BAS20 / BAS21
120 200 250 V
R
100 150 200 V
71 106 141 V
400 mA
200 mA
2.5
0.5
625 mA
PD
JA
STG
250 mW
500
-65 to +150
°C/W
°C
A
Electrical Characteristics @T
= 25°C unless otherwise specified
A
Characteristic Symbol Min Max Unit Test Condition
Reverse Breakdown Voltage (Note 5) BAS19
BAS20
BAS21
Forward Voltage
Reverse Current @ Rated DC Blocking Voltage (Note 5)
Total Capacitance
Reverse Recovery Time
Notes: 4. Part mounted on FR-4 board with recommended pad layout, which can be found on our website at http://www.diodes.com.
5. Short duration pulse test used to minimize self-heating effect.
V
(BR)R
VF ⎯
IR
CT ⎯
trr ⎯
120
200
⎯
V
250
1.0
1.25
⎯
100
15
V
nA
μA
5.0 pF
50 ns
(A)
E
D
WA
E
A
A
1
0.1
0.01
N (mW)
DISSI
WE
D
250
Note 4
200
150
100
50
IR = 100μA
IF = 100mA
IF = 200mA
TJ = 25°C
TJ = 100°C
VR = 0, f = 1.0MHz
IF = IR = 30mA,
I
= 0.1 x IR, RL = 100Ω
rr
F
0
0120
40
T , AMBIENT TEMPERATURE ( C)
A
80
160
200
°
Fig. 1 Power Derating Curve
I, I
0.001
0
V , INSTANT ANEOUS FORWARD VOLT AGE (V)
F
0.40.2
0. 6
0.8
1.0
1.2
Fig. 2 Typical Forward Ch aracteristics
1.4
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 21 - 2
2 of 4
www.diodes.com
November 2011
© Diodes Incorporated
Page 3
C, T
O
T
C
P
C
T
C
F
μ
R
I , INSTANTANEOUS REVERSE VOLT AGE ( A)
0.0001
100
10
1
0.1
0.01
0.001
050100
V , INSTANTANEOUS REVERSE VOLTAGE (V)
R
Fig. 3 Typical Reverse Characteristics
4.0
3.5
)
3.0
E (p
2.5
AN
I
A
2.0
A
1.5
AL
1.0
T
0.5
0.0
200150
250
0
V , DC REVERSE VOLTAGE (V)
Fig. 4 Total Capacitance vs. Reverse Voltage
BAS19 / BAS20 / BAS21
10
R
20
4030
Package Outline Dimensions
K
J
A
Dim Min Max Typ
A 0.37 0.51 0.40
C
B
H
K1
F
D
G
L
M
B 1.20 1.40 1.30
C 2.30 2.50 2.40
D 0.89 1.03 0.915
F 0.45 0.60 0.535
G 1.78 2.05 1.83
H 2.80 3.00 2.90
J 0.013 0.10 0.05
K 0.903 1.10 1.00
K1 - - 0.400
L 0.45 0.61 0.55
M 0.085 0.18 0.11
α
SOT23
0° 8° -
All Dimensions in mm
Suggested Pad Layout
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 21 - 2
Y
Z
X E
C
3 of 4
www.diodes.com
Dimensions Value (in mm)
Z 2.9
X 0.8
Y 0.9
C 2.0
E 1.35
November 2011
© Diodes Incorporated
Page 4
BAS19 / BAS20 / BAS21
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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).
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application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
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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 products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
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representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2011, Diodes Incorporated
www.diodes.com
IMPORTANT NOTICE
LIFE SUPPORT
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 21 - 2
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www.diodes.com
November 2011
© Diodes Incorporated
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