Datasheet

UNISONIC TECHNOLOGIES CO., LTD
BAS21
DIODE
GENERAL PURPOSE DIODES

DESCRIPTION
The UTC BAS21 is a general purpose diode using UTC’s
planar technology to provide customers with high current
capacity and high switching speed.

FEATURES
* High Current Capability
* High Switching Speed

SYMBOL

ORDERING INFORMATION
Ordering Number
BAS21G-AE3-R
BAS21G-CB2-R
Note: Pin Assignment: A: Anode K: Cathode

Package
SOT-23
SOD-323
Pin Assignment
1
2
3
x
A
K
A
K
-
Packing
Tape Reel
Tape Reel
x: NC
MARKING
SOT-23
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
SOD-323
1 of 3
QW-R601-040.D
BAS21

DIODE
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Repetitive Peak Reverse Voltage
Continuous Reverse Voltage
Continuous Forward Current (Note 1)
Repetitive Peak Forward Current
Non-Repetitive Peak Forward
Current (Square Wave,
TJ=25 °C Prior to Surge)
RATINGS
UNIT
250
V
200
V
200
mA
625
mA
t=1µs
9
A
IFSM
t=100µs
3
A
t=10ms
1.7
A
SOT-23
250
mW
Power Dissipation (TA=25°C) (Note 1)
PD
SOD-323
410
mW
Junction Temperature
TJ
150
°C
Storage Temperature
TSTG
-65~+150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

SYMBOL
VRRM
VR
IF
IFRM
THERMAL CHARACTERISTICS
PARAMETER
SYMBOL
SOT-23
θJA
SOD-323
Note: 1. Device mounted on an FR4 printed-circuit board.
Junction to Ambient (Note 1)

RATINGS
330
200
UNIT
K/W
K/W
ELECTRICAL CHARACTERISTICS (TJ=25°C, unless otherwise specified.)
PARAMETER
SYMBOL
Forward Voltage
VF
Reverse Current
IR
Diode Capacitance
CD
Reverse Recovery Time
TRR
TEST CONDITIONS
IF=100mA
IF=200mA
VR=200V
VR=200V, TJ=150°C
f=1MHz, VR=0
when switched from IF=30mA to IR=30mA,
RL=100Ω, measured at IR=3mA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
MAX
1
1.25
100
100
5
UNIT
V
V
nA
μA
pF
50
ns
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QW-R601-040.D
BAS21
DIODE
TEST CIRCUITS AND WAVEFOMS

D.U.T.
RS=50Ω
SAMPLING
OSCILLOSCOPE
IF
Ri=50Ω
V=VR+IF×RS
Reverse recovery voltage test circuit
tr
tp
t
10%
+ IF
trr
t
(IR=3mA)
90%
VR
output signal
input signal
Reverse recovery voltage waveforms
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 3
QW-R601-040.D
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