Features
BAT48
Small signal Schottky diode
■ Low leakage current losses
■ Negligible switching losses
■ Low forward and reverse recovery times
■ Extremely fast switching
■ Surface mount device
■ Low capacitance diode
Description
The BAT48 series uses 40 V Schottky barrier
diodes packaged in SOD-123, SOD-323 or
DO-35. This series is general purpose and
features very low turn-on voltage and fast
switching.
SOD-123
SOD-323
Configurations in top view
A
K
Band indicates cathode
Table 1. Device summary
Symbol Value
I
F
V
RRM
C (typ) 18 pF
(max) 150 °C
T
j
BAT48ZFILM
(Single)
BAT48JFILM
(Single)
BAT48RL
350 mA
40 V
July 2011 Doc ID 12634 Rev 2 1/8
www.st.com
8
Characteristics BAT48
1 Characteristics
Table 2. Absolute ratings (limiting values at Tj = 25 °C, unless otherwise specified)
Symbol Parameter Value Unit
V
I
T
Repetitive peak reverse voltage 40 V
RRM
I
Continuous forward current 350 mA
F
Surge non repetitive forward
FSM
current
Storage temperature range -65 to +150 °C
stg
Maximum operating junction temperature
T
j
range
tp = 10 ms
sinusoidal
SOD-123, SOD-323 2
DO-35 7.5
SOD-123, SOD-323 -40 to +150
DO-35 -40 to +125
SOD-123, SOD-323 260
Maximum temperature for soldering during
T
L
10 s
Table 3. Thermal parameters
DO-35 at 4 mm from
case
230
Symbol Parameter Value Unit
R
R
1. Epoxy printed circuit board with recommended pad layout
2. On infinite heatsink with 4 mm lead length
Junction to ambient
th(j-a)
Junction to lead
th(j-l)
(1)
(2)
SOD-123 500
°C/W
SOD-323 550
DO-35 300 °C/W
A
°C
°C
2/8 Doc ID 12634 Rev 2
BAT48 Characteristics
Table 4. Static electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
I
V
1. Pulse test: tp = 5 ms, δ < 2 %
2. Pulse test: t
Table 5. Dynamic characteristics
Symbol Parameter
Breakdown reverse voltage Tj = 25 °C Ir = 25 µA 40 V
BR
= 1.5 V 1
V
R
= 10 V 2
V
R
= 20 V 5
V
R
V
= 40 V 25
R
= 1.5 V 10
V
R
= 10 V 15
V
R
V
= 20 V 25
R
= 40 V 50
V
R
I
= 0.1 mA 0.25
F
= 1 mA 0.3
I
F
= 10 mA 0.4
I
F
= 50 mA 0.5
I
F
I
= 200 mA 0.75
F
= 500 mA 0.9
I
F
Min. Typ. Max. Unit
(1)
Reverse leakage current
R
(2)
Forward voltage drop Tj = 25 °C
F
= 380 µs, δ < 2 %
p
= 25 °C
T
j
Tj = 60 °C
Test conditions
µA
V
V
= 0 V, F = 1 MHz 30
C Diode capacitance
R
= 1 V, F = 1 MHz 18
V
R
Figure 1. Average forward power dissipation
versus average forward current
P(W)
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40
δ = 0.05
δ = 0.1
δ = 0.2
I (A)
F(AV)
δ = 0.5
δ = 1
T
tp
=tp/T
δ
Doc ID 12634 Rev 2 3/8
Figure 2. Average forward current versus
ambient temperature (δ = 1)
I (A)
F(AV)
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 25 50 75 100 125 150
δ
=tp/T
T
T (°C)
tp
amb
pF
Characteristics BAT48
Figure 3. Reverse leakage current versus
reverse applied voltage
(typical values)
I (µA)
R
1.E+04
T=125°C
1.E+03
1.E+02
1.E+01
1.E+00
1.E-01
0 5 10 15 20 25 30 35 40
j
T=100°C
j
T=75°C
j
T=50°C
j
T=25°C
j
V (V)
R
Figure 5. Junction capacitance versus
reverse applied voltage
(typical values)
C(pF)
35
30
25
20
15
10
5
0
0 5 10 15 20 25 30 35 40
V (V)
R
F=1MHz
V =30mV
OSC RMS
T=25°C
j
Figure 7. Relative variation of thermal
impedance junction to ambient
versus pulse duration (SOD-323)
Z/R
th(j-a) th(j-a)
1.00
Figure 4. Reverse leakage current versus
junction temperature
(typical values)
I (µA)
R
1.E+04
V =40V
R
1.E+03
1.E+02
1.E+01
1.E+00
T (°C)
1.E-01
j
0 25 50 75 100 125
Figure 6. Forward voltage drop versus
forward current (typical values)
I (A)
FM
1.E+00
1.E-01
1.E-02
1.E-03
1.E-04
T=125°C
j
T=25°C
j
V (V)
FM
0.0 0.2 0.4 0.6 0.8 1.0
Figure 8. Thermal resistance junction to
ambient versus copper surface
under each lead (SOD-323)
R (°C/W)
th(j-a)
600
550
printed c ircuit boar d, epoxy FR4, e =3 5 µm
CU
SOD-323
Epoxy FR4
2
S = 2.25 mm
CU
e = 35 µm
Single pulse
0.10
epoxy FR4 with recommended pad layout, e = 35 µm
0.01
1.E-02 1.E-01 1.E+00 1.E+01 1.E+02
CU
t (s)
CU
p
500
450
400
350
300
0 5 10 15 20 25 30 35 40 45 50
4/8 Doc ID 12634 Rev 2
S (mm²)
CU
BAT48 Package information
2 Package information
● Epoxy meets UL94,V0
● Lead-free packages
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com
ECOPACK
Table 6. SOD-123 dimensions
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
.
Dimensions
H
b
E
A2
A1
A 1.45 0.057
Ref.
Millimeters Inches
Min. Max. Min. Max.
A1 0 0.1 0 0.004
D
A
A2 0.85 1.35 0.033 0.053
b 0.55 Typ. 0.022 Typ.
c
c 0.15 Typ. 0.039 Typ.
D 2.55 2.85 0.1 0.112
G
E 1.4 1.7 0.055 0.067
G0.25 0.01
H 3.55 3.75 0.14 0.148
Figure 9. SOD-123 footprint, dimensions in mm (inches)
4.00
(0.157)
0.65
(0.026)
Doc ID 12634 Rev 2 5/8
2.70
(0.106)
0.65
(0.026)
0.57
(0.022)
Package information BAT48
Table 7. SOD-323 dimensions
Dimensions
H
b
E
D
c
Q1
L
A1
A
Figure 10. SOD-323 footprint (dimensions in mm)
3.20
Ref.
Millimeters Inches
Min. Max. Min. Max.
A 1.17 0.046
A1 0 0.1 0 0.004
b 0.25 0.44 0.01 0.017
c 0.1 0.25 0.004 0.01
D 1.52 1.8 0.06 0.071
E 1.11 1.45 0.044 0.057
H 2.3 2.7 0.09 0.106
L 0.1 0.46 0.004 0.02
Q1 0.1 0.41 0.004 0.016
0.54
Table 8. DO-35 dimensions
CC
ØD
A
ØB
1.081.06 1.06
Ref.
Dimensions
Millimeters Inches
Min. Max. Min. Max.
A 3.05 4.50 0.120 0.177
B 1.53 2.00 0.060 0.079
C 12.7 0.500
D 0.458 0.558 0.018 0.022
6/8 Doc ID 12634 Rev 2
BAT48 Ordering information
3 Ordering information
Table 9. Ordering information
Order code Marking Package Weight Base qty Delivery mode
BAT48ZFILM Z48 SOD-123 Single 10 mg 3000 Tape and reel
BAT48JFILM 48 SOD-323 Single 5 mg 3000 Tape and reel
BAT48RL BAT48 DO-35 15 mg 4000 Tape and reel
4 Revision history
Table 10. Document revision history
Date Revision Changes
08-Aug-2006 1 Initial release.
07-Jul-2011 2 Updated package information for SOD-123. Added DO-35 package.
Doc ID 12634 Rev 2 7/8
BAT48
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8/8 Doc ID 12634 Rev 2
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