BA157 THRU BA159
FAST SILICON RECTIFIERS
Reverse Voltage – 400 to 1000 Volts
Forward Current – 1.0 Ampere
Features
•Low
forward voltage
•High
current capability
•Low
leakage current
•High
surge capability
•Low
cost
Absolute Maximum Ratings (T
a
= 25
o
C)
Symbol
Repetitive Peak Reverse Voltage
BA157
BA158
BA159
o
Value
400
600
1000
1
1)
Unit
V
V
V
A
A
O
O
V
RRM
V
RRM
V
RRM
Io
o
Average Rectified Current at T
amb
=50 C
Surge Forward Current, Half Cycle 50Hz, starting from T
j
=25 C
Junction Temperature
Operating and Storage Temperature Range
1)
I
FSM
T
j
T
S
35
125
-65 to +125
C
C
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 20/06/2003
BA157 THRU BA159
FAST SILICON RECTIFIERS
Characteristics at T
j
=25
o
C
Symbol
Forward Voltage
at I
F
=1A, T
j
=25
o
C
Leakage Current
at V
RRM
, T
amb
=25 C
Capacitance
at f=1MHz ,V
R
=4V
V
R
=4V
V
R
=4V
Reverse Recovery Time
I
F
=10mA, I
R
=10mA
I
RR
=1mA
Reverse Recovery Time
I
F
=0.5A, I
R
=1A
I
RR
=0.25A
BA157
BA158
BA159
BA157
BA158
BA159
BA157
BA158
BA159
C
tot
C
tot
C
tot
t
rr
t
rr
t
rr
t
rr
t
rr
t
rr
R
thA
-
-
-
-
-
-
-
-
-
-
15
15
15
-
-
-
-
-
-
-
-
-
-
300
300
500
150
150
250
25
1)
pF
pF
pF
ns
ns
ns
ns
ns
ns
K/W
o
Min.
Typ.
Max.
Unit
V
F
I
R
-
-
-
-
1.3
5
V
μA
Thermal Resistance Junction to Ambient Air
1)
Valid provided that leads are kept at ambient temperature at a distance of 8 mm from case.
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 20/06/2003
BA157 THRU BA159
FAST SILICON RECTIFIERS
FIG.1-FORWARD CURRENT DERATING CURVE
1.0
AVERAGE FORWARD CURRENT
AMPERES
PEAK FORWARD CURRENT
AMPERES
Fig.2- MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
35
0.8
0.6
0.4
25
T
J
=55 C
8.3ms Single Half
Sine-Wave
o
15
0.2
5
0
0
25
50
75
100
125
150
175
0
1
10
NUMBER OF CYCLES AT 60 Hz
100
AMBIENT TEMPERATURE, (
o
C)
Fig.3-TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
20
10
INSTANTANEOUS FORWARD CURRENT
AMPERES
1
Tj=25 C
Pulse Width=300 S
1% Duty Cycle
o
0.1
0.01
0.4 0.6 0.8
1.0
1.2
1.4 1.6 1.8 2.0
INSTANTANEOUS FORWARD VOLTAGE
VOLTS
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 20/06/2003
BA157 THRU BA159
FAST SILICON RECTIFIERS
Fig.4- TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT,
MICROAMPERES
Fig.5- TYPICAL JUNCTION CAPACITANCE
100
JUNCTION CAPACITANCE,pF
100
Tj=25 C
f=1.0MHz
Vsig=50mVp-p
o
10
T
J
=100
o
C
1
10
0.1
T
J
=25 C
o
0.01
0
20
40
60
80
100
0
0.1
1
10
100
REVERSE VOLTAGE, VOLTS
PERCENT OF RATED PEAK REVERSE
VOLTAGE,%
Fig.6- TYPICAL TRANSIENT THERMAL IMPEDANCE
TRANSIENT THERMAL IMPEDANCE, C/W
100
o
10
1
0.1
0.01
0.1
1
10
100
t, PULSE DURATION,sec.
SEMTECH ELECTRONICS LTD.
(Subsidiary
of Sino-Tech International Holdings Limited, a company
listed on the Hong Kong Stock Exchange, Stock Code: 724)
®
Dated : 20/06/2003
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