BAS21T
150mW 250 Volt
Switching Diode
SOT-523
Features
x Ultra-Small Surface Mount Package
x Fast Switching Speed
x For General Purpose Switching Applications
x High Conductance
Maximum Ratings
x Operating Temperature: -65qC to +150qC
x Storage Temperature: -65qC to +150qC
Marking : T3
INCHES MM
DIM MIN MAX MIN MAX NOTE
A.059.0671.501.70
B .030 .033 0.75 0.85
C .057 .069 1.45 1.75
D .020 Nominal 0.50Nominal
E.035.0430.901.10
G .000 .004 .000 .100
H .028 .031 .70 0.80
J .004 .008 .100 .200
K .010 .014 .25 .35
A
C
B
D
E
GH
J
DIMENSIONS
K
Revision: A 2011/01/01
omponents
20736 Marilla Street Chatsworth

 !"#
$%  !"#
Electrical Characteristics @ 25qC Unless Otherwise Specified
Peak Repetitive
Reverse Voltage VRRM 250V
Average Rectified
Output Current IO 200mA
Power Dissipation PD 150mW
Peak Forward Surge
Current @t=1.0us
@t=1.0s
IFSM 2.5A
0.5A
Maximum
Instantaneous
Forward Voltage VF
1V
1.25V
IF=100mA
IF=200mA
Maximum DC
Reverse Current At
Rated DC Blocking
Voltage
IR100nA VR=250Volts
Typical Total
Capacitance CT 5pF
Measured at
1.0MHz, VR=0V
Reverse Recovery
Time
Trr 50nS IF = IR = 30mA,
Irr = 0.1 x IR,
RL = 100:
www.mccsemi.com
1 of 3
MCC TM
Micro Commercial Components
Epoxy meets UL 94 V-0 flammability rating
Moisture Sensitivity Level 1
0.001
0.01
0.1
1
00.4
0.2 0. 6
I , INSTANTANEOUS FORWARD CURRENT (A)
F
V , INSTANTANEOUS FORWARD VOLTAGE (V)
Fig. 1 Typical Forward Characteristics
F
0.8 1.2
1.0 1.4
T = 0ºC
A
T = 150ºC
A
T = -40ºC
A
T = 25ºC
A
T = 75ºC
A
T = 125ºC
A
0.0001
0.01
0.001
0.1
1
10
100
050 100 200
150 250
V , INSTANTANEOUS REVERSE VOLTAGE (V)
Fig. 2 Typical Reverse Characteristics
R
T = -40ºC
A
T = 25ºC
A
T = 75ºC
A
T = 125ºC
A
T = 150ºC
A
T=0ºC
A
0100 200
200
150
50
100
0
T , AMBIENT TEMPERATURE ( C)
Fig. 4 Power Derating Curve, Total Package
A
°
P , POWER DISSIPATION (mW)
d
0.0
0.5
1.0
1.5
3.5
3.0
2.5
2.0
4.
0
010 20 40
30
C , TOTAL CAPACITANCE (pF)
T
V , REVERSE VOLTAGE (V)
Fig. 3 Typical Capacitance vs. Reverse Voltage
R
f = 1.0MHz
Revision: A 2011/01/01
MCC
BAS21T
TM
Micro Commercial Components
www.mccsemi.com
2 of 3
MCC
Revision: A 2011/01/01
TM
Micro Commercial Components
www.mccsemi.com
3 of 3
Device Packing
Part Number-TP Tape&Reel: 3Kpcs/Reel
Ordering Information :
***IMPORTANT NOTICE***
Micro Commercial Components Corp. reserves the right to make changes without further notice to any product herein to
make corrections, modifications , enhancements , improvements , or other changes . Micro Commercial Components
Corp . 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 Micro Commercial Components Corp . and all the companies whose products are
represented on our website, harmless against all damages.
***LIFE SUPPORT***
MCC's products are not authorized for use as critical components in life support devices or systems without the express written
approval of Micro Commercial Components Corporation.
***CUSTOMER AWARENESS***
Counterfeiting of semiconductor parts is a growing problem in the industry. Micro Commercial Components (MCC) is taking
strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. MCC strongly encourages
customers to purchase MCC parts either directly from MCC or from Authorized MCC Distributors who are listed by country on
our web page cited below. Products customers buy either from MCC directly or from Authorized MCC Distributors are genuine
parts, have full traceability, meet MCC's quality standards for handling and storage. MCC will not provide any warranty
coverage or other assistance for parts bought from Unauthorized Sources. MCC is committed to combat this global
problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized
distributors.