Page 1
Features
· Fast Switching Speed
· Surface Mount Package Ideally Suited for
Automatic Insertion
· For General Purpose Switching Applications
· High Conductance
Mechanical Data
· Case: SOT-323, Molded Plastic
· Case Material - UL Flammability Rating
Classification 94V-0
· Moisture sensitivity: Level 1 per J-STD-020A
· Terminals: Solderable per MIL-STD-202,
Method 208
· Terminal Connections: See Diagram
· 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 (approx.)
BAS19W - BAS21W
SURFACE MOUNT FAST SWITCHING DIODE
A
C
B
G
H
K
J
TOP VIEW
L
FD
M
SOT-323
Dim Min Max
0.25 0.40
A
1.15 1.35
B
2.00 2.20
C
0.65 Nominal
D
0.30 0.40
E
1.20 1.40
G
1.80 2.20
H
0.0 0.10
J
0.90 1.00
K
0.25 0.40
L
0.10 0.18
M
a 0° 8°
All Dimensions in mm
Maximum Ratings
@ TA= 25°C unless otherwise specified
Characteristic Symbol BAS19W BAS20W BAS21W Unit
Repetitive Peak Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
RMS Reverse Voltage
Forward Continuous Current (Note 1)
Average Rectified Output Current (Note 1)
Non-Repetitive Peak Forward Surge Current @ t = 1.0ms
@ t = 1.0s
Repetitive Peak Forward Surge Current
Power Dissipation
Thermal Resistance Junction to Ambient Air (Note 1)
Operating and Storage Temperature Range
Electrical Characteristics
@ TA= 25°C unless otherwise specified
V
RRM
V
RWM
V
V
R(RMS)
I
I
FSM
I
FRM
P
R
Tj,T
FM
I
qJA
O
R
d
STG
120 200 250 V
100 150 200
71 106 141 V
400 mA
200
mA
2.5
0.5
625 mA
200 mW
625 °C/W
-65 to +150
V
A
°C
Characteristic Symbol Min Max Unit Test Condition
Reverse Breakdown Voltage (Note 2) BAS19W
BAS20W
BAS21W
Forward Voltage (Note 2)
Reverse Current
@ Rated DC Blocking Voltage (Note 2)
Total Capacitance
Reverse Recovery Time
V
(BR)R
V
F
I
R
C
T
t
rr
120
200
250
¾
¾
¾
¾
¾
¾
¾
1.0
1.25
100
15
5.0 pF
50 ns
nA
mA
V
V
I
= 100mA
R
= 100mA
I
F
= 200mA
I
F
= 25°C
T
j
T
= 100°C
j
V
= 0, f = 1.0MHz
R
IF = IR = 30mA,
= 0.1 x IR,RL = 100W
I
rr
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.
DS30118 Rev. 6 - 2 1 of 3 BAS19W - BAS21W
www.diodes.com
Page 2
0
O
O
1
O
O
4
100
T = 150ºC
A
RWARD CURRENT (A)
US F
F
I , INSTANTANE
0.1
0.01
0.001
4.
3.5
3.0
2.5
T = -40ºC
A
T = 0ºC
A
T = 25ºC
A
T = 75ºC
A
T = 125ºC
1.0
A
1.2
T = 150ºC
A
0.2
0
V , INSTANTANEOUS FORWARD VOLTAGE (V)
F
0.4
0. 6
0.8
Fig. 1 Typical Forward Characteristics
f = 1.0MHz
10
1
0.1
0.01
0.001
T = 125ºC
A
T = 75ºC
A
T = 25ºC
A
T = 0ºC
A
T = -40ºC
A
0.0001
1.
0
V , INSTANTANEOUS REVERSE VOLTAGE (V)
50
R
100
150
200
250
Fig. 2 Typical Reverse Characteristics
250
200
N (mW)
150
2.0
1.5
100
WER DISSIPATI
1.0
T
C , TOTAL CAPACITANCE (pF)
0.5
0.0
0
10
V , REVERSE VOLTAGE (V)
R
20
Fig.3 Typical Capacitance vs. Reverse Voltage
30
40
P,P
50
d
0
0
T , AMBIENT TEMPERATURE (°C)
A
100 200
Fig. 4 Power Derating Curve, Total Package
DS30118 Rev. 6 - 2 2 of 3 BAS19W - BAS21W
www.diodes.com
Page 3
Ordering Information
Device Packaging Shipping
BAS19W-7 SOT-323 3000/Tape & Reel
BAS20W-7 SOT-323 3000/Tape & Reel
BAS21W-7 SOT-323 3000/Tape & Reel
Notes: 3. For Packaging Details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
(Note 3)
Marking Information
XXX = Product Type Marking Code (See Page 1 Diagrams)
XXX
Date Code Key
Year 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Code
LMN P R S TUVW
YM = Date Code Marking
Y = Year ex: N = 2002
YM
M = Month ex: 9 = September
Month Jan Feb March Apr May Jun Jul Aug Sep Oct Nov Dec
Code
123456789OND
DS30118 Rev. 6 - 2 3 of 3 BAS19W - BAS21W
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