THRU
SOT-346
Suggested Solder
Pad Layout
Features
INCHES MM
DIM
MIN
MAX
MIN
MAX
NOTE
A .106 .122 2.70 3.10
B .051 .067 1.30 1.70
C .039 .051 1.00 1.30
D .014 .020 0.35 0.50
G .067 .091 1.70 2.30
H .000 .004 0.00 0.10
J .004 .010 0.10 0.26
K .008 .024 0.20 0.60
L .049 .065 1.25 1.65
S .089 .118 2.25 3.00
Maximum Ratings
.094
2.400
inches
mm
.031
.800
.039
1.000
.037
.950
.037
.950
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mccsemi
.com
Mechanical Data
Case :SOT-346,Molded Plastic
Terminals :Solderable per MIL-STD-202,Method 208
Polarity :See Diagrams Below
Weight :0.008 grams (approx)
Mountion Position :Any
Electrical Characteristics @ 25
C Unless Otherwise Specified
Average Forward
Current
I
F(AV)
1.0A T
A
=
90
C
Peak Forward Surge
Current
I
FSM
5A 8.3ms, half sine
Maximum Forward
Voltage Drop Per
Element
Maximum DC
Reverse Current At
Rated DC Blocking
Voltage
I
R
100
4.0mA
T
J
= 25
C
T
J
= 100
C
*Pulse Test: Pulse Width 300
sec, Duty Cycle 1%
V
F
0.45V
0.53V
RB491D
RB490D
Operating Temperature: -25
C to +125
C
Storage Temperature: -
50
C to +125
C
20 to 40 Volts
2.5-3.0
0.098-0.118
RB490D
RB491D
Low Turn-on Voltage
Fast Switching
PN Junction Guard Ring for Transient and ESD Protection
DIMENSIONS
1Amp Surface Mount
Schottky Barrier Diode
S
G
D
B
L
A
1
3
2
H
C
J
K
I
FM
= 1.0A
T
J
= 25
C
2
ANODE
3
CATHODE
MCC
Catalog
Number
Device
Marking
Maximum
Recurrent
Peak Reverse
Voltage
Maximum
RMS
Voltage
Maximum
DC
Blocking
Voltage
RB491D 10T 20V 14V 20V
RB490D 10F 40V 28V 40V
omponents
21201 Itasca Street Chatsworth
!"#
$
% !"#
M C C
RB490D thru RB491D
M C C
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mccsemi
.com
RATING AND CHARACTERISTIC CURVES
FIG.1-TYPICAL FORWARD
CHARACTERISTICS
FIG.2-TYPICAL FORWARD CURRENT DERATING CURVE
A
V
E
R
A
G
E
F
O
R
W
A
R
D
C
U
R
R
E
N
T
,
(
A
)
FIG.4-TYPICAL JUNCTION CAPACITANCE
REVERSE VOLTAGE,(V)
J
U
N
C
T
I
O
N
C
A
P
A
C
I
T
A
N
C
E
,
(
p
F
)
I
N
S
T
A
N
T
A
N
E
O
U
S
F
O
R
W
A
R
D
C
U
R
R
E
N
T
,
(
A
)
FORWARD VOLTAGE,(V)
0.
2
0.
4
0.
6
0.
8
1
.
0
1
.
2
175
150
125
100
25
0
.01 .05 .1 .5 1 5 10 50 100
Single Phase
Half Wave 60Hz
Resistive Or Inductive Load
AMBIENT TEMPERATURE ( C)
.1
1.0
10
100
FIG.3 - TYPICAL REVERSE
CHARACTERISTICS
R
E
V
E
R
S
E
L
E
A
K
A
G
E
C
U
R
R
E
N
T
,
(
m
A
)
PERCENTAGE RATED PEAK REVERSE VOLTAGE
0 20 40 60 80 100 120 140
.01
Tj=75 C
Tj=25 C
0
0 20 40
60 80 100 120 140 160 180 200
75
50
0.1
1.0
.01
10
50
.1 .3 .5 .7 .9 1.1 1.3 1.5
3.0
Pulse Width 300us
1% Duty Cycle
Tj=25 C
4
9
1
4
9
0
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