RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
USF81
THRU
USF84
GLASS PASSIVATED SUPER FAST RECTIFIER
VOLTAGE RANGE 50 to 200 Volts CURRENT 8.0 Amperes
FEATURES
*
*
*
*
*
*
*
High reliability
Low leakage
Low forward voltage
High current capability
Super fast switching speed
High surge capability
Good for switching mode circuit
.413 (10.5)
.374 (9.5)
.153 (3.9)
.146 (3.7)
.270 (6.9)
.230 (5.8)
.610 (15.5)
.583 (14.8)
.04MAX.
(1.0)
.157
(4.0)
.187 (4.7)
.148 (3.8)
.053 (1.3)
.047 (1.2)
TO-220A
MECHANICAL DATA
*
*
*
*
*
Case: TO-220 Molded plastic
Epoxy: Device has UL flammability classification 94V-O
Lead: MIL-STD-202E method 208C guaranteed
Mounting position: Any
Weight: 2.24 grams
.108
(2.75)
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
o
.051
(1.3)
.035 (0.9)
.028 (0.7)
.102 (2.6)
.091 (2.3)
.583 (14.8)
.531 (13.5)
.022 (0.56)
.014 (0.36)
.126
(3.2)
Dimensions in inches and (millimeters)
MAXIMUM RATINGS
(At T
A
= 25
o
C unless otherwise noted)
RATINGS
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Volts
Maximum DC Blocking Voltage
Maximum Average Forward Current
o
at T
C
= 100 C
Peak Forward Surge Current I
FM
(surge):8.3 ms single half
sine-wave superimposed on rated load (JEDEC method)
Typical Junction Capacitance (Note 2)
Operating and Storage Temperature Range
SYMBOL
V
RRM
V
RMS
V
DC
I
O
I
FSM
C
J
T
J
, T
STG
USF81
50
35
50
USF82
100
70
100
8.0
150
45
-55 to + 150
USF83
150
105
150
USF84
200
140
200
UNITS
Volts
Volts
Volts
Amps
Amps
pF
0
C
ELECTRICAL CHARACTERISTICS
(At T
A
= 25 C unless otherwise noted)
CHARACTERISTICS
Maximum Forward Voltage at 8.0A DC
Maximum DC Reverse Current
at Rated DC Blocking Voltage
Maximum Reverse Recovery Time (Note 1)
NOTES : 1. Test Conditions: I
F
=0.5A, I
R
=-1.0A, I
RR
=-0.25A.
2. Measured at 1 MH
Z
and applied reverse voltage of 4.0 volts.
@T
A
= 25
o
C
@T
A
=100
o
C
SYMBOL
V
F
I
R
trr
USF81
USF82
0.95
10
500
20
nSec
2002-7
USF83
USF84
UNITS
Volts
uAmps
o
RATING AND CHARACTERISTIC CURVES ( USF81 THRU USF84 )
FIG. 1 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC
50
NONINDUCTIVE
10
NONINDUCTIVE
trr
+0.5A
(-)
PULSE
GENERATOR
AVERAGE FORWARD CURENT, (A)
FIG. 2 - TYPICAL FORWARD
CURRENT DERATING CURVE
14
12
10
8
6
4
2
0 25 50 75 100 125 150 175
AMBIENT TEMPERATURE (
)
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
(+)
25 Vdc
(approx)
(-)
D.U.T
0
-0.25A
(NOTE 2)
1
NON-
INDUCTIVE
OSCILLOSCOPE
(NOTE 1)
(+)
-1.0A
NOTES:
1 Rise Time = 7ns max. Input Impedance =
1 megohm. 22pF.
2. Rise Time = 10ns max. Source Impedance =
50 ohms.
1cm
SET TIME BASE FOR
10 ns/cm
FIG. 3 - TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT, (uA)
INSTANTANEOUS FORWARD CURRENT, (A)
FIG. 4 - TYPICAL INSTANTANEOUS
FORWARD CHARACTERISTICS
100
100
TJ = 150
10
TJ = 100
10
1.0
1
TJ = 25
.1
TJ = 25
Pulse Width = 300uS
1% Duty Cycle
.1
.01
0
20
40
60
80
100
120
140
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
FIG. 5 - MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT
PEAK FORWARD SURGE CURRENT, (A)
.01
0
.2
.4
.6
.8
1.0
1.2
1.4
INSTANTANEOUS FORWARD VOLTAGE, (V)
FIG. 6 - TYPICAL JUNCTION CAPACITANCE
JUNCTION CAPACITANCE, (pF)
175
150
125
100
75
50
25
0
1
2
5
10
20
50
NUMBER OF CYCLES AT 60Hz
100
8.3ms Single Half Sine-Wave
(JEDEC Method)
200
100
60
40
20
10
6
4
2
1
.1
.2
.4
1.0
2
4
10
20 40 100
TJ = 25
REVERSE VOLTAGE, ( V )
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