DS30118 Rev. 8 - 2 1 of 3 BAS19W - BAS21W
www.diodes.com ã Diodes Incorporated
Mechanical Data
BAS19W - BAS21W
SURFACE MOUNT FAST SWITCHING DIODE
·Case: SOT-323
·Case Material: Molded Plastic. UL Flammability
Classification Rating 94V-0
·Moisture Sensitivity: Level 1 per J-STD-020C
·Terminal Connections: See Diagram
·Terminals: Solderable per MIL-STD-202, Method 208
·Also Available in Lead Free Plating (Matte Tin Finish
annealed over Alloy 42 leadframe). Please See Ordering
Information, Note 5, on Page 3
·BAS19W Marking: KA8 or KT2 or KT3 (See Page 3)
·BAS20W Marking: KT2 or KT3 (See Page 3)
·BAS21W Marking: KT3 (See Page 3)
·Weight: 0.006 grams (approximate)
·Fast Switching Speed
·Surface Mount Package Ideally Suited for Automatic
Insertion
·For General Purpose Switching Applications
·High Conductance
·Available in Lead Free/RoHS Compliant Version (Note 3)
SOT-323
Dim Min Max
A0.25 0.40
B1.15 1.35
C2.00 2.20
D0.65 Nominal
E0.30 0.40
G1.20 1.40
H1.80 2.20
J0.0 0.10
K0.90 1.00
L0.25 0.40
M0.10 0.18
a0°8°
All Dimensions in mm
TOP VIEW
A
M
JL
FD
BC
H
K
G
Characteristic Symbol Min Max Unit Test Condition
Reverse Breakdown Voltage (Note 2) BAS19W
BAS20W
BAS21W
V(BR)R
120
200
250
¾
¾
¾
VIR = 100mA
Forward Voltage (Note 2) VF¾1.0
1.25 VIF = 100mA
IF = 200mA
Reverse Current
@ Rated DC Blocking Voltage (Note 2) IR¾100
15
nA
mA
Tj = 25°C
Tj = 100°C
Total Capacitance CT¾5.0 pF VR = 0, f = 1.0MHz
Reverse Recovery Time trr ¾50 ns IF = IR = 30mA,
Irr = 0.1 x IR,R
L = 100W
Electrical Characteristics
Characteristic Symbol BAS19W BAS20W BAS21W Unit
Repetitive Peak Reverse Voltage VRRM 120 200 250 V
Working Peak Reverse Voltage
DC Blocking Voltage
VRWM
VR100 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) IO200 mA
Non-Repetitive Peak Forward Surge Current @ t = 1.0ms
@ t = 1.0s IFSM 2.5
0.5 A
Repetitive Peak Forward Surge Current IFRM 625 mA
Power Dissipation Pd200 mW
Thermal Resistance Junction to Ambient Air (Note 1) RqJA 625 °C/W
Operating and Storage Temperature Range Tj,T
STG -65 to +150 °C
Maximum Ratings @ TA= 25°C unless otherwise specified
@ TA= 25°C unless otherwise specified
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 test pulse used to minimize self-heating effect.
3. No purposefully added lead.
Features
SPICE MODELS: BAS19W BAS20W BAS21W
DS30118 Rev. 8 - 2 2 of 3 BAS19W - BAS21W
www.diodes.com
0.0001
0.01
0.001
0.1
1
10
100
050 100 200
150 250
V , INSTANTANEOUS REVERSE VOLTAGE (V)
R
Fig. 2 Typical Reverse Characteristics
T = -40ºC
A
T = 25ºC
A
T = 75ºC
A
T = 125ºC
A
T = 150ºC
A
T = 0ºC
A
0.0
0.5
1.0
1.5
3.5
3.0
2.5
2.0
4.
0
010 20 40
30
C , TOTAL CAPACITANCE (pF)
T
V , REVERSE VOLTAGE (V)
R
Fi
g
.3 T
y
pical Capacitance vs. Reverse Volta
g
e
f = 1.0MHz
0100 200
250
200
150
50
100
0
T , AMBIENT TEMPERATURE (°C)
A
Fig. 4 Power Derating Curve, Total Package
P,P
O
WER DISSIPATI
O
N(mW)
d
0.001
0.01
0.1
1
00.4
0.2 0. 6
I , INSTANTANE
O
US F
O
RWARD CURRENT (A)
F
V , INSTANTANEOUS FORWARD VOLTAGE (V)
F
Fig. 1 Typical Forward Characteristics
0.8 1.2
1.0 1.
4
T = 0ºC
A
T = 150ºC
A
T = -40ºC
A
T = 25ºC
A
T = 75ºC
A
T = 125ºC
A
DS30118 Rev. 8 - 2 3 of 3 BAS19W - BAS21W
www.diodes.com
Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec
Code 123456789OND
Year 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Code LMN P R S TUVW
Date Code Key
XXX = Product Type Marking Code (See Page 1 Diagrams)
YM = Date Code Marking
Y = Year ex: N = 2002
M = Month ex: 9 = September
XXX
YM
Marking Information
Notes: 4. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
5. For Lead Free/RoHS Compliant version part numbers, please add "-F" suffix to the part numbers above. Example: BAS21W-7-F.
Device Packaging Shipping
BAS19W-7 SOT-323 3000/Tape & Reel
BAS20W-7 SOT-323 3000/Tape & Reel
BAS21W-7 SOT-323 3000/Tape & Reel
(Note 4)
Ordering Information