BAS521-HF

SMD Switching Diodes
BAS521-HF
Reverse Voltage: 300 Volts
Forward Current: 250 mA
RoHS Device
Halogen Free
SOD-523
0.067(1.70)
0.059(1.50)
0.051(1.30)
0.043(1.10)
Features
- Ultra small plastic SMD package.
0.028(0.70)
0.020(0.50)
0.035(0.90)
0.028(0.70)
- High voltage switching diode.
- High continuous reverse voltage: 300V
- Repetitive peak forward current: 625mA
0.012(0.30)
Typ.
- High switching speed: max.50ns, Molded plastic
Mechanical data
0.004(0.10)
Typical
0.010(0.25)
0.006(0.15)
- Case: SOD-523 standard package,
- Terminals: Solderable per MIL-STD-750, method 2026
Dimensions in inches and (millimeter)
- Mounting position: Any
- Weight: 0.012 grams(approx.)
Circuit Diagram
Maximum Ratings (at T =25°C unless otherwise noted)
A
Symbol
Value
Unit
VRRM
300
V
VR
300
V
IF
250
mA
IFRM
1
A
Non-repetitive peak forward surge current
tp=1ms;square wave; TJ=25°C prior to surge
IFSM
4.5
A
Total power dissipation
Ptot
500
mW
TJ
150
°C
TSTG, Tamb
-65 ~ +150
°C
Parameter
Repetitive peak reverse voltage
Continous reverse voltage
Continous forward currnt
Ts≤90°C; Note 1
Repetitive forward current
tp=1ms
Ts≤90°C; Note 1
Junction temperature
Storage and operating ambient temperature
Note: Ts is temperature at the soldering point of the cathode tab.
Electrical Characteristics (at T =25°C unless otherwise noted)
A
Parameter
Symbol
Conditions
Min.
Typ.
300
340
Max.
Unit
Breakdown voltage
VBR
IR=100uA
Forwardvoltage
VF
IF=100mA
0.95
1.1
V
IR
VR=250V
30
150
nA
IR
VR=250V, TJ=150°C
40
100
μA
Diode capacitance
Cd
VR=0V, f=1MHz
0.4
5
pF
Reverse recovery time
trr
When switching from IF=30mA
to IR=30mA; RL=100W;
measured at IR=3mA
16
50
nS
Reverse current
V
Company reserves the right to improve product design , functions and reliability without notice.
REV:A
Page 1
QW-J0004
Comchip Technology CO., LTD.
SMD Switching Diodes
RATING AND CHARACTERISTIC CURVES (BAS521-HF)
Fig.2 - Reverse current as a function of junction
temperature
Fig.1 - Forward current as a function of forward
voltage; typical values
2
10
400
TA=150°C
Reverse Current, (μA)
Forward Current, (mA)
500
TA=25°C
300
TA=75°C
200
100
10
1.0
-1
10
VR = VRmax
Typical values
-2
0
0
0.5
1
10
1.5
0
40
Fig.3 - Maximum permissible continuous forward
current as a function of ambient temperature.
120
160
200
Fig.4 - Diode capacitance as a function of
reverse voltage; typical values
300
0.42
Diode Capacitance , (pF)
Continous Forward Current , (mA)
80
Junction Temperature, (°C)
Forward Voltage, (V)
200
100
0.38
0.34
0.30
0
0
50
100
150
200
0
Ambient Temperature, (°C)
10
20
30
40
Reverse Voltage, (V)
Fig.5 - Maximum permissible non-repetitive peak
forward current as a Function of pulse duration
2
Peak Forward Surge Current, (A)
10
10
1
-1
10
1
10
2
10
3
10
4
10
Pulse Duration, (us)
Company reserves the right to improve product design , functions and reliability without notice.
REV:A
Page 2
QW-J0004
Comchip Technology CO., LTD.
SMD Switching Diodes
Reel Taping Specification
P0
d
P1
T
E
F
B
A
W
C
P
12
o
0
D2
D1 D
W1
Trailer
Device
.......
.......
End
.......
.......
Leader
.......
.......
10 pitches (min)
.......
.......
Start
10 pitches (min)
Direction of Feed
SOD-523
SOD-523
SYMBOL
A
B
C
d
D
D1
D2
(mm)
0.95 ± 0.05
1.94 ± 0.05
0.73 ± 0.10
1.50 + 0.10
178 ± 1.00
54.00 ± 0.50
13.00 ± 0.50
(inch)
0.037 ± 0.002
0.076 ± 0.002
0.029 ± 0.004
0.059 + 0.004
7.008 ± 0.039
2.126 ± 0.020
0.512 ± 0.020
SYMBOL
E
F
P
P0
P1
W
W1
(mm)
1.75 ± 0.10
3.50 ± 0.05
2.00 ± 0.05
4.00 ± 0.10
2.00 ± 0.05
8.00 + 0.30 /–0.10
9.50 ± 1.00
(inch)
0.069 ± 0.004
0.138 ± 0.002
0.079 ± 0.002
0.157 ± 0.004
0.079 ± 0.002 0.315 + 0.012 /–0.004
0.374 ± 0.039
Company reserves the right to improve product design , functions and reliability without notice.
REV:A
Page 3
QW-J0004
Comchip Technology CO., LTD.
SMD Switching Diodes
Marking Code
Part Number
Marking Code
BAS521-HF
L4
L4
Suggested PAD Layout
SOD-523
A
SIZE
(mm)
(inch)
A
1.40
0.055
B
0.40
0.016
C
0.40
0.016
C
B
Standard Packaging
REEL PACK
Case Type
SOD-523
REEL
Reel Size
( pcs )
(inch)
3,000
7
Company reserves the right to improve product design , functions and reliability without notice.
REV:A
Page 4
QW-J0004
Comchip Technology CO., LTD.
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