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BAS21T
Document number: DS30264 Rev. 10 - 2
1 of 3
www.diodes.com
March 2009
? Diodes Incorporated
BAS21T
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)
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)
Maximum Ratings
@TA
= 25°C unless otherwise specified
Characteristic
Symbol
Value
Unit
Repetitive Peak Reverse Voltage
VRRM
250
V
Working Peak Reverse Voltage
DC Blocking Voltage
VRWM
VR
200
V
RMS Reverse Voltage
VR(RMS)
141
V
Forward Continuous Current (Note 1)
IFM
400
mA
Average Rectified Output Current (Note 1)
IO
200
mA
Non-Repetitive Peak Forward Surge Current @ t = 1.0μs
@ t = 1.0s
IFSM
2.5
0.5
A
Repetitive Peak Forward Surge Current
IFRM
625
mA
Thermal Characteristics
Characteristic
Symbol
Value
Unit
Power Dissipation (Note 1)
PD
150
mW
Thermal Resistance Junction to Ambient (Note 1)
RθJA
833
°C/W
Operating and Storage Temperature Range
TJ, TSTG
-65 to +150
°C
Electrical Characteristics
@TA
= 25°C unless otherwise specified
Characteristic
Symbol
Min
Max
Unit
Test Condition
Reverse Breakdown Voltage (Note 2)
V(BR)R
250
?
V
IR
= 100
μA
Forward Voltage
VF
?
1.0
1.25
V
IF
= 100mA
IF
= 200mA
Reverse Current @ Rated DC Blocking Voltage (Note 2)
IR
?
100
15
nA
μA
TJ
= 25
°C
TJ
= 100
°C
Total Capacitance
CT
?
5.0
pF
VR
= 0, f = 1.0MHz
Reverse Recovery Time
trr
?
50
ns
IF
= I
R
= 30mA,
Irr = 0.1 x IR, RL
= 100
Ω
Notes: 1. Device mounted on FR-4 PC board with recommended pad layout, which can be found on our website at
http://www.dio
des.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
2O3
Fire Retardants.
TOP VIEW
SOT-523
Internal Schematic
TOP VIEW
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