BAS19W - BAS21
W
SURFACE MOUNT FAST SWITCHING DIODE
Features
• Fast Switching Speed
• Surface Mount Package Ideally Suited for Automated Insertion
• For General Purpose Switching Applications
• High Conductance
• Lead Free/RoHS Compliant (Note 3)
• Qualified to AEC-Q101 Standards for High Reliability
• "Green" Device (Notes 4 and 5)
Mechanical Data
• Case: SOT-323
• Case Material: Molded Plastic, "Green" Molding Compound,
Note 5. UL Flammability Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020D
• Terminal Connections: See Diagram
• Terminals: Solderable per MIL-STD-202, Method 208
• Lead Free Plating (Matte Tin Finish annealed over Alloy 42
leadframe)
• BAS19W Marking: KA8 or KT2 or KT3 (See Page 2)
• BAS20W Marking: KT2 or KT3 (See Page 2)
• BAS21W Marking: KT3 (See Page 2)
• Weight: 0.006 grams (approximate)
SOT-323
Internal Schematic
TOP VIEW
TOP VIEW
Maximum Ratings @TA = 25°C unless otherwise specified
Characteristic Symbol BAS19W BAS20W BAS21W 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 1) IFM 400 mA
Average Rectified Output Current (Note 1) 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 IFRM 625 mA
Thermal Characteristics
Characteristic Symbol Value Unit
Power Dissipation PD 200 mW
Thermal Resistance Junction to Ambient Air (Note 1) RθJA 625 °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 2) BAS19W
BAS20W
BAS21W 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 2) IR ⎯ 100
15 nA
μA TJ = 25°C
TJ = 100°C
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: 1. Part mounted on FR-4 PC board with minimum recommended pad layout, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
2. Short duration pulse test used to minimize self-heating effect.
3. No purposefully added lead.
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 0627 (week 27, 2006) and newer are built with Green Molding Compound. Product manufactured prior to Date
Code 0627 are built with Non-Green Molding Compound and may contain Halogens or Sb2O3 Fire Retardants.
BAS19W - BAS21W
Document number: DS30118 Rev. 13 - 2 1 of 3
www.diodes.com March 2008
© Diodes Incorporated
BAS19W - BAS21
W
BAS19W - BAS21W
Document number: DS30118 Rev. 13 - 2 2 of 3
www.diodes.com March 2008
© Diodes Incorporated
0100200
250
200
150
50
100
0
T , AMBIENT TEMPERA TURE ( C)
Fig. 1 Power Derating Curve
A
°
0.001
0.01
0.1
1
00.40.2 0. 6
I , INS
T
AN
T
ANE
O
U
S
F
O
R
WA
R
D
C
U
R
R
EN
T
(A )
F
V , INSTANTANEOUS FORWARD VOL TAGE (V)
Fig. 2 Typical Forward Characteristics
F
0.8 1.21.0 1.4
Note 1
P
,
P
O
WE
R
DISSI
P
A
T
I
O
N (mW)
D
0.0001
0.01
0.001
0.1
1
10
100
050100 200150 250
V , INSTANTANEOUS REVERSE VOLT AGE (V)
Fig. 3 Typical Reverse Characteristics
R
0.0
0.5
1.0
1.5
3.5
3.0
2.5
2.0
4.0
010 20 4030
C
,
T
O
T
AL
C
A
P
A
C
I
T
AN
C
E (p
F
)
T
V , DC REVERSE VOLT AGE (V)
Fig. 4 Total Capacitance vs. Reverse Voltage
R
Ordering Information (Notes 5 & 6)
Part Number Case Packaging
BAS19W-7-F SOT-323 3000/Tape & Reel
BAS20W-7-F SOT-323 3000/Tape & Reel
BAS21W-7-F SOT-323 3000/Tape & Reel
Notes: 6. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
XXX
YM
XXX = Product Type Marking Code (See Page 1)
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
Date Code Key
Year 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Code 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
BAS19W - BAS21
W
Package Outline Dimensions
BAS19W - BAS21W
Document number: DS30118 Rev. 13 - 2 3 of 3
www.diodes.com March 2008
© Diodes Incorporated
Suggested Pad Layout
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 an y 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 President of Diodes Incorporated.
A
M
JL
DF
BC
H
K
G
TOP VIEW
SOT-323
Dim Min Max
A 0.25 0.40
B 1.15 1.35
C 2.00 2.20
D 0.65 Nominal
F 0.30 0.40
G 1.20 1.40
H 1.80 2.20
J 0.0 0.10
K 0.90 1.00
L 0.25 0.40
M 0.10 0.18
α 0° 8°
All Dimensions in mm
X E
G
Y
C
Z
Dimensions Value (in mm)
Z 2.8
G 1.0
X 0.7
Y 0.9
C 1.9
E 0.65
