Diodes BAS21T User Manual
)
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
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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)
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March 2009
© Diodes Incorporated
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