)
θ
(BR)
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SURFACE MOUNT FAST SWITCHING DIODE
Features
• Ultra-Small Surface Mount Package
• Fast Switching Speed
• For General Purpose Switching Applications
• High Conductance
• Lead Free/RoHS Compliant (Note 3)
• "Green" Device (Notes 4 and 5)
Maximum Ratings @T
= 25°C unless otherwise specified
A
Characteristic Symbol Value 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 = 1.0μs
@ t = 1.0s
Repetitive Peak Forward Surge Current
TOP VIEW
Mechanical Data
• Case: SOT-523
• Case Material: Molded Plastic, "Green" Molding Compound,
Note 5. UL Flammability Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020D
• Terminals: Solderable per MIL-STD-202, Method 208
• Lead Free Plating (Matte Tin Finish annealed over Alloy 42
leadframe)
• Polarity: See Diagram
• Marking Information: See Page 2
• Ordering Information: See Page 2
• Weight: 0.002 grams (approximate)
SOT-523
TOP VIEW
Internal Schematic
V
V
V
R(RMS
I
I
RRM
RWM
VR
IFM
IO
FSM
FRM
250 V
200 V
141 V
400 mA
200 mA
2.5
0.5
625 mA
BAS21T
A
Thermal Characteristics
Characteristic Symbol Value Unit
Power Dissipation (Note 1)
Thermal Resistance Junction to Ambient (Note 1)
Operating and Storage Temperature Range
Electrical Characteristics @T
Characteristic Symbol Min Max Unit Test Condition
Reverse Breakdown Voltage (Note 2)
Forward Voltage
Reverse Current @ Rated DC Blocking Voltage (Note 2)
Total Capacitance
Reverse Recovery Time
Notes: 1. Device mounted on FR-4 PC board with recommended pad layout, which can be found on our website at
BAS21T
Document number: DS30264 Rev. 10 - 2
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 UO (week 40, 2007) and newer are built with Green Molding Compound. Product manufactured prior to Date
Code UO are built with Non-Green Molding Compound and may contain Halogens or Sb
A
PD
R
TJ, T
= 25°C unless otherwise specified
V
R
VF ⎯
IR
CT
trr
1 of 3
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JA
STG
250
⎯
⎯
⎯
⎯
1.0
1.25
100
15
5.0 pF
50 ns
Fire Retardants.
2O3
150 mW
833
-65 to +150
V
IR = 100μA
IF = 100mA
V
IF = 200mA
nA
TJ = 25°C
μA
TJ = 100°C
VR = 0, f = 1.0MHz
IF = IR = 30mA,
I
= 0.1 x IR, RL = 100Ω
rr
°C/W
°C
March 2009
© Diodes Incorporated
P, P
O
R
PATIO
N
N
T
N
TANEO
US FORWARD CUR
REN
T
C, TOT
CAPACITANC
F
BAS21T
1
(A)
(mW)
200
150
0.1
100
DISSI
WE
D
50
0.01
A
S
F
I, I
0.001
0.8
00.40.2
V , INSTANTANEOUS FORWARD VOLTAGE (V)
F
0. 6
1.0
Fig. 2 Typical Forward Charac te r istics
4.0
1.2
1.4
100
0
0
T , AMBIENT TEMPERATURE ( C)
A
100 200
°
Fig. 1 Power Derating Curve
T = 150ºC
A
3.5
10
T = 125ºC
A
)
3.0
1
T = 75ºC
A
E (p
2.5
0.1
0.01
0.001
0.0001
050100
V , INSTANTANEOUS REVERSE VOLTAGE (V)
R
Fig. 3 Typical Reverse Characteristics
T = 25ºC
A
T = 0ºC
A
T = -40ºC
A
200150
250
2.0
1.5
AL
1.0
T
0.5
0.0
0
10
V , DC REVERSE VOLT AGE (V)
R
20
4030
Fig. 4 Total Capacitance vs. Reverse Voltage
Ordering Information (Notes 5 & 6)
Part Number Case Packaging
BAS21T-7-F SOT-523 3000/Tape & Reel
Notes: 6. For packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf.
Marking Information
T3YM
Date Code Key
Year 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Code 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
BAS21T
Document number: DS30264 Rev. 10 - 2
www.diodes.com
T3 = Product Type Marking Code
YM = Date Code Marking
Y = Year (ex: N = 2002)
M = Month (ex: 9 = September)
2 of 3
March 2009
© Diodes Incorporated
BAS21T
Package Outline Dimensions
K
J
A
Dim Min Max Typ
C
B
G
H
N
D
L
M
SOT-523
A 0.15 0.30 0.22
B 0.75 0.85 0.80
C 1.45 1.75 1.60
D
⎯ ⎯
G 0.90 1.10 1.00
H 1.50 1.70 1.60
J 0.00 0.10 0.05
K 0.60 0.80 0.75
L 0.10 0.30 0.22
M 0.10 0.20 0.12
N 0.45 0.65 0.50
0° 8°
α
All Dimensions in mm
0.50
⎯
Suggested Pad Layout
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 any 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.
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.
Y
Dimensions Value (in mm)
Z
X
E
IMPORTANT NOTICE
C
LIFE SUPPORT
Z 1.8
X 0.4
Y 0.51
C 1.3
E 0.7
BAS21T
Document number: DS30264 Rev. 10 - 2
3 of 3
www.diodes.com
March 2009
© Diodes Incorporated
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