USF32(G) [LGE]
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LGE 
USF31-USF34
Super Fast Rectifiers
VOLTAGE RANGE: 50 --- 200 V
CURRENT: 3.0 A
DO - 27
Features
Low cost
Low leakage
Low forward voltage drop
High current capability
Easilycleaned with alcohol,Isopropanol
and similar solvents
The plastic material carries U/L recognition 94V-0
Mechanical Data
Case:JEDEC DO--27,molded plastic
Terminals: Axial lead ,solderable per
MIL- STD-202,Method 208
Dimensions in millimeters
Polarity: Color band denotes cathode
Weight: 0.041 ounces,1.15 grams
Mounting position: Any
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 ambient temperature unless otherwise specified.
Single phase,half wave,60Hz,resistive or inductive load. For capacitive load,derate by20%.
USF31
USF32
USF33
USF34
UNITS
Maximumrecurrent peak reverse voltage
Maximum RMS voltage
50
35
50
100
70
150
105
150
200
140
200
V
V
V
VRRM
VRMS
VDC
Maximum DC blocking voltage
100
Maximumaverage forw ard rectified current
3.0
A
IF(AV)
9.5mmlead length,
@TA=75
Peak forw ard surge current
IFSM
125.0
0.92
A
8.3ms single half-sine-w ave
superimposed on rated load @TJ=125
Maximuminstantaneous forw ard voltage
@ 3.0A
VF
IR
V
A
Maximum reverse current
@TA=25
10.0
500.0
20
at rated DC blocking voltage @TA=100
Maximumreverse recovery time (Note1)
ns
pF
/W
trr
CJ
Typical junction capacitance
Typical thermal resistance
(Note2)
(Note3)
20
20
RθJA
TJ
Operating junction temperature range
- 55 ----- + 150
- 55 ----- + 150
Storage temperature range
TSTG
NOTE: 1. Measured with IF=0.5A, IR=1A, Irr=0.25A.
2. Measured at 1.0MHz and applied rev erse v oltage of 4.0V DC.
3. Thermal resistance from junction to ambient.
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USF31-USF34
Super Fast Rectifiers
Ratings AND Charactieristic Curves
FIG.1 -- TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC
t r r
50
1.
10
N
+0.5A
N
1.
D.U.T.
0
(+)
PULSE
GENERATOR
(NOTE2)
-0 .2 5A
25VDC
(approx)
(-)
OSCILLOSCOPE
(NOTE 1)
1
NONIN-
DUCTIVE
-1 .0 A
1
c m
NOTES:1.RISE TIME = 7ns MAX.INPUT IMPEDANCE = 1M .22pF.
SET TIME BASE FOR 10/20 ns/cm
JJJJJ2.RISE TIME =10ns MAX.SOURCE IMPEDANCE=50
.
FIG.2 -- TYPICAL FORWARD CHARACTERISTIC
FIG.3 -- FORWARD DERATING CURVE
z
100
40
20
T J =25
P ulse W idth=300 µs
Single Phase
Half Wave 60HZ
5
Resistive or
Inductive Load
10
4
3
2
0.375"(9.5mm)Lead Length
4
2
1
0.4
0.2
0.1
0.04
0.02
1
0
0.01
0
25
50
75 100 125
150 175
0
0.2
0.4 0.6 0.8 1.0 1.2 1.4
INSTANTANEOUS FORWARD VOLTAGE, VOLTS
AMBIENT TEMPERATURE,
FIG.4 -- TYPICAL JUNCTION CAPACITANCE
FIG.5 -- PEAK FORWARD SURGE CURRENT
150
100
60
8.3ms Single Half
Sine-Wave
125
40
20
100
75
10
6
4
50
25
0
TJ=25
f=1.0MHZ
2
1
0.1 0.2 0.4
1
2
4
10
20 40
100
1
5
10
50 100
REVERSE VOLTAGE,VOLTS
NUMBER OF CYCLES AT60Hz
FIG.6 -- TYPICAL REVERSE CHARACTERISTICS
100
T J = 1 5 0
10
T J = 1 0 0
1
.1
T J = 2 5
8 0
.0 1
0
2 0
4 0
6 0
1 0 0 1 2 0 1 4 0
PERCENT OF RATED PEAK REVERSE VOLTAGE,
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