DS12004 Rev. 12 - 2
1 of 2
BAS19 / BAS20 / BAS21
BAS19 / BAS20 / BAS21
SURFACE MOUNT FAST SWITCHING DIODE
Features
Case: SOT-23, Molded Plastic
Terminals: Solderable per MIL-STD-202,
Method 208
Case material - UL Flammability Rating
Classification 94V-0
Moisture sensitivity: Level 1 perJ-STD-020A
Polarity: See Diagram
BAS19 Marking: KA8, KT3, KT2
BAS20 Marking: KT2, KT3
BAS21 Marking: KT3
Weight: 0.008 grams (approx.)
Mechanical Data
A
E
J
L
TOP VIEW
M
B C
H
G
D
K
Characteristic
Symbol
BAS19
BAS20
BAS21
Unit
Repetitive Peak Reverse Voltage
V
RRM
120
200
250
V
Working Peak Reverse Voltage
DC Blocking Voltage
V
RWM
V
R
100
150
200
V
RMS Reverse Voltage
V
R(RMS)
71
106
141
V
Forward Continuous Current
I
FM
400
mA
Average Rectified Output Current
I
O
200
mA
Non-Repetitive Peak Forward Surge Current @ t = 1.0ms
@ t = 1.0s
I
FSM
2.5
0.5
A
Repetitive Peak Forward Surge Current
I
FRM
625
mA
Power Dissipation (Note 1)
P
d
250
mW
Thermal Resistance Junction to Ambient Air (Note 1)
R
qJA
500
C/W
Operating and Storage Temperature Range
T
j
, T
STG
-65 to +150
C
Maximum Ratings
@ T
A
= 25C unless otherwise specified
Note:
1. Part mounted on FR-4 board with recommended pad layout, which can be found on ourwebsite
at http://www.diodes.com/datasheets/ap02001.pdf.
2. Short duration pulse test used to minimize self-heating effect.
Characteristic
Symbol
Min
Max
Unit
Test Condition
Reverse Breakdown Voltage (Note 2) BAS19
BAS20
BAS21
V
(BR)R
120
200
250
V
I
R
= 100mA
Forward Voltage (Note 2)
V
FM
1.0
1.25
V
I
F
= 100mA
I
F
= 200mA
Reverse Current @ Rated DC Blocking Voltage (Note 2)
I
RM
100
15
nA
mA
T
j
= 25C
T
j
= 100C
Total Capacitance
C
T
5.0
pF
V
R
= 0, f = 1.0MHz
Reverse Recovery Time
t
rr
50
ns
I
F
= I
R
= 30mA,
I
rr
= 0.1 x I
R
, R
L
= 100W
Electrical Characteristics
@ T
A
= 25C unless otherwise specified
Fast Switching Speed
Surface Mount Package Ideally Suited for
Automatic Insertion
For General Purpose Switching Applications
High Conductance
SOT-23
Dim
MinMax
A
0.37
0.51
B
1.20
1.40
C
2.30
2.50
D
0.89
1.03
E
0.45
0.60
G
1.78
2.05
H
2.80
3.00
J
0.013
0.10
K
0.903
1.10
L
0.45
0.61
M
0.85
0.80
a
0
8
All Dimensions in mm
DS12004 Rev. 12 - 2
2 of 2
BAS19 / BAS20 / BAS21
10
1.0
100
1000
0.1
0.01
0
1
2
I
,
INST
ANT
ANEOUS
FOR
W
ARD
CURRENT
(mA)
F
V , INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 1 Forward Characteristics
F
T = 25 C
j
1
10
100
0.1
0.01
0
100
200
I
,
LEAKAGE
CURRENT
(
A)
R
T , JUNCTION TEMPERATURE ( C)
Fig. 2 Leakage Current vs Junction Temperature
j
Ordering Information
(Note 3)
Notes:
3. For Packaging Details, go to ourwebsite at http://www.diodes.com/datasheets/ap02007.pdf.
Device
Packaging
Shipping
BAS19-7
BAS20-7
BAS21-7
SOT-23
3000/Tape & Reel
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
1998
1999
2000
2001
2002
2003
2004
Code
J
K
L
M
N
P
R
Month
Jan
Feb
March
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Code
1
2
3
4
5
6
7
8
9
O
N
D
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