BL
FEATURES
GALAXY ELECTRICAL
SK32B- -
-SK3A0B
REVERSE VOLTAGE: 20 - 100 V
FORWARD CURRENT: 3.0 A
SURFACE MOUNT SCHOTTKY
BARRIER RECTIFIERS
SMB
Schottky barrier rectifier
Guardring protection
Low forward voltage
Reverse energy tested
High current capability
Extremely low thermal resistance
MECHANICAL DATA
Case: SMB molded plastic body
1111
Polarity: Color band denotes cathode end
Mounting position: ANY
Weight: 0.003 ounces, 0.093 gram
inch(mm)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
o
C ambient temperature unless otherwise specified
SK32B SK33B SK34B SK35B SK36B SK38B SK39BSK3A0B
UNITS
Device marking code
Maximum repetitive peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forward rectified current at
T
L
=90
Peak forward surge current 8.3ms single half-
sine-wave
Maximum instantaneous forward voltage
at I
FM
=3.0A (NOTE1)
Maximum DC reverse current
at rated DC blocking voltage
Maximum thermal resistance
Operating temperature range
Storage temperature range
T
J
=25
T
J
=100
SK32B SK33B SK34B SK35B SK36B SK38B SK39BSK3A0B
V
RRM
V
RWS
V
DC
I
F(AV)
I
FSM
V
F
I
R
R
JL
20
14
20
30
21
30
40
28
40
50
35
50
3.0
100.0
60
42
60
80
56
80
90
63
90
100
70
100
V
V
V
A
A
0.50
0.70
0.5
20.0
17.0
- 55 ---- +125
- 55 ---- +150
0.85
V
mA
o
C/W
o
o
T
J
T
STG
C
C
NOTE: 1.Pulse test: Pulse width 300us,duty cycle 1 %
www.galaxycn.com
Document Number 0281008
BL
GALAXY ELECTRICAL
1.
RATINGS AND CHARACTERISTIC CURVES
SK32B- - -SK3A0B
FIG.1 -- FORWARD DERATING CURVE
AVERAGE FORWARD RECTIFIED CURRENT
PEAK FORWARD SURGE CURRENT
AMPERES
FIG.2 -- PEAK
FORWARD SURGE CURRENT
80
70
60
50
40
30
20
10
4
3
T
J
=T
J
MAX
8.3ms Single Half
Sine-Wave
AMPERES
2
1
Resistive or
Inductive Load
0.375"(9.5mm)Lead
Length
0
0
25
50
75
100
125
150
175
1
10
100
LEAD TEMPERATURE,
NUMBER OF CYCLES AT 60Hz
FIG.3 -- TYPICAL INSTANTANEOUS FORWARD
XXXXXXXXX----CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT
FIG.4 -- TYPICAL JUNCTION CAPACITANCE
20
SK32B-SK34B
SK38B-SK3A0B
1000
CAPACITANCE, pF
10
T
J
=25
℃
f=1.0MHz
Vsig=50mVp-p
100
AMPERES
1
SK35B-SK36B
T
J
= 2 5
P u ls e w id t h = 3 0 0
1 % D u t y C y c le
s
.1
.1
.3
.5
.7
.9
1 .1
1 .3
1 .5
1 .7
1 .9
2 .1
10
0.1
1
10
100
INSTANTANEOUS FORWARD VOLTAGE, VOLTS
REVERSE VOLTAGE,VOLTS
www.galaxycn.com
Document Number 0281008
BL
GALAXY ELECTRICAL
2.
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