SMD Switching Diode
BAS21/BAS21C/BAS21S
List
Formosa MS
List................................................................................................. 1
Package outline............................................................................... 2
Features.......................................................................................... 2
Mechanical data............................................................................... 2
Maximum ratings ............................................................................. 2~3
Rating and characteristic curves........................................................ 4
Pinning information........................................................................... 5
Marking........................................................................................... 5
Suggested solder pad layout............................................................. 5
Packing information.......................................................................... 6
Reel packing.................................................................................... 7
Suggested thermal profiles for soldering processes............................. 7
High reliability test capabilities........................................................... 8
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/08/10
Revised Date
2012/04/12
Revision
C
Page.
8
Page 1
DS-221930
SMD Switching Diode
BAS21/BAS21C/BAS21S
225mW Surface Mount
Switching Diode- 250V
Package outline
Formosa MS
SOT-23
0.045 (1.15)
0.034 (0.85)
0.020 (0.50)
(C)
0.012 (0.30)
0.007 (0.18)
0.003 (0.09)
Features
•
Fast Switching Speed
•
Surface Mount Package Ideally Suited for Automatic Insertion
•
High Conductance
•
Lead-free parts meet RoHS requirments
•
Suffix "-H" indicates Halogen-free part, ex.BAS21C-H.
0.120 (3.04)
0.110 (2.80)
.084(2.10)
.068(1.70)
(B)
(A)
0.063 (1.60)
0.047 (1.20)
0.108 (2.75)
0.083 (2.10)
0.027 (0.67)
0.013 (0.32)
Mechanical data
0.051 (1.30)
0.035 (0.89)
•
Epoxy:UL94-V0 rated flame retardant
•
Case : Molded plastic, SOT-23
•
Terminals : Solder plated, solderable per
MIL-STD-750, Method 2026
Dimensions in inches and (millimeters)
•
Mounting Position : Any
•
Weight : Approximated 0.008 gram
Maximum ratings
(AT T =25 C unless otherwise noted)
o
A
PARAMETER
Continuous Reverse Voltage
Forward Current
Peak Forward Surge Current @ t=1.0s
SYMBOL
BAS21
BAS21C
250
BAS21S
UNIT
V
V
R
I
F
I
FM
200
225
625
mA
mA
Thermal Characteristics
PARAMETER
Total Device Dissipation FR-5
Board* , T
A
= 25 C
Derate Above 25 C
Thermal Resistance Junction to Ambient
Total Device Dissipation Alumina
Substrate* , T
A
= 25 C
Derate Above 25 C
Thermal Resistance Junction to Ambient
Operating Temperature Range
Storage Temperature Range
1. FR–5 = 1.0 x 0.75 x 0.062 in.
2. Alumina = 0.4 x 0.3 x 0.024 in. 99.5% alumina.
O
2
O
O
1
O
SYMBOL
MAX.
225
1.8
UNIT
mW
mW/
O
C
O
P
D
R
θJA
P
D
R
θJA
T
J
T
STG
556
300
2.4
417
-55 ~ +150
-65 ~ +150
C/W
mW
mW/
O
C
O
C/W
o
C
C
o
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/08/10
Revised Date
2012/04/12
Revision
C
Page.
8
Page 2
DS-221930
SMD Switching Diode
BAS21/BAS21C/BAS21S
Electrical Characteristics
(AT T =25 C unless otherwise noted)
o
A
Formosa MS
UNIT
V
V
PARAMETER
Reverse Breakdown Voltage
I
R
=100μA
Forward Voltage
I
F
= 100 mA
I
F
= 200 mA
Reverse leakage
V
R
= 200 V
V
R
= 200 V, Tj =150°C
Total capacitance
V
R
= 0 V , f = 1.0MHz
Reverse recovery time
I
F
= I
R
= 30mA , I
RR
= 0.1 * I
R
, R
L
= 100
OHM
Symbol
V
(BR)
V
F
Min
250
Max
1.00
1.25
0.1
100
5.0
50
I
R
C
J
t
rr
uA
pF
ns
Recovery Time Equivalent Test Circuit
820
Ω
+10
V
2k
100
µH
0.1
µF
DUT
50
Ω
Οutput
Pulse
Generator
50
ΩInput
Sampling
Oscilloscope
90%
VR
Input Signal
IR
I
R(REC)
=
30 mA
Output Pulse
(I
F
=
IR
=
30 mA; measured
atI R(REC)
=
3 mA)
IF
0.1
µF
IF
trr
t
tr
10%
tp
t
Notes: 1.
A 2.0 kΩ
variable resistor adjusted for a Forward Current
(I
F
)
of 30 mA.
Notes:
2. Input pulse is adjusted so IR(peak) is equal to 30 mA.
Notes:
3. tp
>>t
rr
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/08/10
Revised Date
2012/04/12
Revision
C
Page.
8
Page 3
DS-221930
Rating and characteristic curves(BAS21/BAS21C/BAS21S)
Figure 1. Forward Voltage
1200
FORWARD VOLTAGE
(mV)
REVERSE CURRENT
(nA)
TA = −55°C
1000
800
155°C
600
400
200
1
1
10
100
1000
FORWARD CURRENT
(mA)
25°C
7000
6000
5000
4000
3000
6
5
4
3
2
1
0
1
2
Figure 2. Reverse Leakage
TA = 155°C
TA = 25°C
TA = −55°C
5
10
20
50
100 200 300
REVERSE VOLTAGE
(V)
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/08/10
Revised Date
2012/04/12
Revision
C
Page.
8
Page 4
DS-221930
SMD Switching Diode
BAS21/BAS21C/BAS21S
Formosa MS
Pinning information
Type number
BAS21
Marking code
JS
C
A
B
Symbol
A
B
BAS21C
JU
C
A
B
BAS21S
JT
C
Suggested solder pad layout
SOT-23
0.037(0.95)
0.037(0.95)
0.079(2.0)
0.035(0.90)
0.031(0.80)
Dimensions in inches and (millimeters)
http://www.formosams.com/
TEL:886-2-22696661
FAX:886-2-22696141
Document ID
Issued Date
2009/08/10
Revised Date
2012/04/12
Revision
C
Page.
8
Page 5
DS-221930
