BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 22 - 2
1 of 4
www.diodes.com
June 2018
© Diodes Incorporated
BAS19 / BAS20 / BAS21
SURFACE MOUNT FAST SWITCHING DIODE
Features
Fast Switching Speed
Surface Mount Package Ideally Suited for Automated Insertion
For General Purpose Switching Applications
High Conductance
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Qualified to AEC-Q101 Standards for High Reliability
PPAP Capable (Note 4)
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)
Ordering Information (Note 5)
Part Number
Case
Packaging
BAS19-7-F
SOT23
3,000/Tape & Reel
BAS20-7-F
SOT23
3,000/Tape & Reel
BAS20-13-F
SOT23
10,000/Tape & Reel
BAS20Q-13-F
SOT23
10,000/Tape & Reel
BAS21-7-F
SOT23
3,000/Tape & Reel
BAS21Q-7-F
SOT23
3,000/Tape & Reel
BAS21-13-F
SOT23
10,000/Tape & Reel
BAS21Q-13-F
SOT23
10,000/Tape & Reel
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine
(<1500ppm total Br + Cl) and <1000ppm antimony compounds.
4. Automotive products are AEC-Q101 qualified and are PPAP capable. Automotive, AEC-Q101 and standard products are electrically and thermally the
same, except where specified. For more information, please refer to https://www.diodes.com/quality/.
5. For packaging details, go to our website at http://www.diodes.com/products/packages.html.
Marking Information
Date Code Key
Year
2000
2001
2002
…..
2016
2017
2018
2019
2020
2021
2022
2023
2024
Code
L
M
N
…..
D
E
F
G
H
I
J
K
L
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
Top View
SOT23
Top View
Internal Schematic
KXX = Product Type Marking Code
BAS19 Marking: KA8, KT3; KT2
BAS20 Marking: KT2, KT3
BAS21 Marking: KT3
YM = Date Code Marking
Y = Year (ex: F = 2018)
M = Month (ex: 9 = September)
KXX
YM
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 22 - 2
2 of 4
www.diodes.com
June 2018
© Diodes Incorporated
BAS19 / BAS20 / BAS21
Maximum Ratings (@TA = 25°C, unless otherwise specified.)
Characteristic
Symbol
BAS19
BAS20
BAS21
Unit
Repetitive Peak Reverse Voltage
VRRM
120
200
250
V
Working Peak Reverse Voltage
DC Blocking Voltage
VRWM
VR
100
150
200
V
RMS Reverse Voltage
VR(RMS)
71
106
141
V
Forward Continuous Current (Note 6)
IFM
400
mA
Average Rectified Output Current (Note 6)
IO
200
mA
Non-Repetitive Peak Forward Surge Current @ t = 1.0µs
@ t = 1.0s
IFSM
2.5
0.5
A
Repetitive Peak Forward Surge Current (Note 6)
IFRM
625
mA
Thermal Characteristics
Characteristic
Symbol
Value
Unit
Power Dissipation (Note 6)
PD
250
mW
Thermal Resistance Junction to Ambient Air (Note 6)
RJA
500
°C/W
Operating and Storage Temperature Range
TJ , TSTG
-65 to +150
°C
Electrical Characteristics (@TA = 25°C, unless otherwise specified.)
Characteristic
Symbol
Min
Max
Unit
Test Condition
Reverse Breakdown Voltage (Note 7) BAS19
BAS20
BAS21
V(BR)R
120
200
250
V
IR = 100µA
Forward Voltage
VF
1.0
1.25
V
IF = 100mA
IF = 200mA
Reverse Current @ Rated DC Blocking Voltage (Note 7)
IR
100
15
nA
µA
TJ = 25C
TJ = 100C
Total Capacitance
CT
5.0
pF
VR = 0, f = 1.0MHz
Reverse Recovery Time
trr
50
ns
IF = IR = 30mA,
Irr = 0.1 x IR, RL = 100Ω
Notes: 6. Part mounted on FR-4 board with recommended pad layout, which can be found on our website at http://www.diodes.com. IFM, IO are valid provided that
terminals are kept at ambient temperature.
7. Short duration pulse test used to minimize self-heating effect.
0 120 160 200
250
200
150
50
40 80
100
0
T , AMBIENT TEMPERATURE ( C)
Fig. 1 Power Derating Curve
A°
P , POWER DISSIPATION (mW)
D
Note 4
0.001
0.01
0.1
1
00.40.2 0. 6
I , INSTANTANEOUS FORWARD CURRENT (A)
F
V , INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 2 Typical Forward Characteristics
F
0.8 1.2
1.0 1.4
Note 6
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 22 - 2
3 of 4
www.diodes.com
June 2018
© Diodes Incorporated
BAS19 / BAS20 / BAS21
0.0001
0.01
0.001
0.1
1
10
100
050 100 200150 250
V , INSTANTANEOUS REVERSE VOLTAGE (V)
Fig. 3 Typical Reverse Characteristics
R
I , INSTANTANEOUS REVERSE VOLTAGE ( A)
R
0.0
0.5
1.0
1.5
3.5
3.0
2.5
2.0
4.0
010 20 4030
C , TOTAL CAPACITANCE (pF)
T
V , DC REVERSE VOLTAGE (V)
Fig. 4 Total Capacitance vs. Reverse Voltage
R
Package Outline Dimensions
Please see http://www.diodes.com/package-outlines.html for the latest version.
J
K1 K
L1
GAUGE PLANE
0.25
H
L
M
All 7°
A
CB
D
G
F
a
Suggested Pad Layout
Please see http://www.diodes.com/package-outlines.html for the latest version.
X
Y
Y1 C
X1
SOT23
Dim
Min
Max
Typ
A
0.37
0.51
0.40
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
0.890
1.00
0.975
K1
0.903
1.10
1.025
L
0.45
0.61
0.55
L1
0.25
0.55
0.40
M
0.085
0.150
0.110
a
0°
8°
--
All Dimensions in mm
Dimensions
Value (in mm)
C
2.0
X
0.8
X1
1.35
Y
0.9
Y1
2.9
BAS19 / BAS20 / BAS21
Document number: DS12004 Rev. 22 - 2
4 of 4
www.diodes.com
June 2018
© Diodes Incorporated
BAS19 / BAS20 / BAS21
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 products for any unintended or unauthorized 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 patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
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 products and any
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 © 2018, Diodes Incorporated
www.diodes.com