Diodes BAS21T User Manual
Bas21t, Features, Mechanical data
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
@T
A
= 25°C unless otherwise specified
Characteristic
Symbol
Value
Unit
Repetitive Peak Reverse Voltage
V
RRM
250
V
Working Peak Reverse Voltage
DC Blocking Voltage
V
RWM
V
R
200
V
RMS Reverse Voltage
V
R(RMS)
141
V
Forward Continuous Current (Note 1)
I
FM
400
mA
Average Rectified Output Current (Note 1)
I
O
200
mA
Non-Repetitive Peak Forward Surge Current
@ t = 1.0
μs
@ t = 1.0s
I
FSM
2.5
0.5
A
Repetitive Peak Forward Surge Current
I
FRM
625
mA
Thermal Characteristics
Characteristic
Symbol
Value
Unit
Power Dissipation (Note 1)
P
D
150
mW
Thermal Resistance Junction to Ambient (Note 1)
R
θJA
833
°C/W
Operating and Storage Temperature Range
T
J
, T
STG
-65 to +150
°C
Electrical Characteristics
@T
A
= 25°C unless otherwise specified
Characteristic
Symbol
Min
Max
Unit
Test Condition
Reverse Breakdown Voltage (Note 2)
V
(BR)R
250
⎯
V
I
R
= 100
μA
Forward Voltage
V
F
⎯
1.0
1.25
V
I
F
= 100mA
I
F
= 200mA
Reverse Current @ Rated DC Blocking Voltage (Note 2)
I
R
⎯
100
15
nA
μA
T
J
= 25
°C
T
J
= 100
°C
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
= 100
Ω
Notes:
1. Device mounted on FR-4 PC board with recommended pad layout, which can be found on our website at
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 websit5. 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
2
O
3
Fire Retardants.
TOP VIEW
SOT-523
Internal Schematic
TOP VIEW