GLASS PASSIVATED SUPER FAST RECTIFIER
VOLTAGE RANGE 50 to 200 Volts CURRENT 3.0 Amperes
RECTRON
SEMICONDUCTOR
TECHNICAL SPECIFICATION
FEATURES
* High reliability
* Low leakage
* Low forward voltage
* High current capability
* Super fast switching speed
* High surge capability
* Good for switching mode circuit
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
o
C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
ELECTRICAL CHARACTERISTICS (At T
A
= 25
o
C unless otherwise noted)
USF31
THRU
USF34
DO-201AD
MAXIMUM RATINGS (At T
A
= 25
o
C unless otherwise noted)
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.
Dimensions in inches and (millimeters)
MECHANICAL DATA
* Case: Molded plastic
* Epoxy: Device has UL flammability classification 94V-O
* Lead: MIL-STD-202E method 208C guaranteed
* Mounting position: Any
* Weight: 1.18 grams
2002-4
RATINGS
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Volts
Maximum DC Blocking Voltage
Maximum Average Forward Current
at T
A
= 55
o
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
DC
I
O
I
FSM
C
J
T
J
, T
STG
V
RMS
Volts
Volts
Volts
Amps
3.0
125
20
-55 to + 150
Amps
pF
0
C
UNITS
SF31
SF34
SF32
SF33
50
200
100
150
35
140
70
105
50
200
100
150
at Rated DC Blocking Voltage
CHARACTERISTICS
Maximum Reverse Recovery Time (Note 1)
V
F
SYMBOL
I
R
trr
UNITS
0.90
10
uAmps
nSec
Maximum DC Reverse Current
Maximum Forward Voltage at 3.0A DC
Volts
@T
A
= 25
o
C
@T
A
=100
o
C
USF31
USF34
USF32
USF33
500
20
.220 (5.6)
.197 (5.0)
DIA.
.052 (1.3)
.048 (1.2)
DIA.
1.0 (25.4)
MIN.
.335 (8.5)
.375 (9.5)
1.0 (25.4)
MIN.
RECTRON
RATING AND CHARACTERISTIC CURVES ( USF31 THRU USF34 )
FIG. 6 - TYPICAL JUNCTION CAPACITANCE
JUNCTION CAPACITANCE, (pF)
REVERSE VOLTAGE, ( V )
200
100
60
40
20
10
6
4
2
1
.1
.2
.4
1.0
2
4
10
20 40
100
TJ = 25
FIG. 1 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC
50
NONINDUCTIVE
10
NONINDUCTIVE
D.U.T
25 Vdc
(approx)
( - )
( - )
( + )
( + )
1
NON-
INDUCTIVE
OSCILLOSCOPE
(NOTE 1)
PULSE
GENERATOR
(NOTE 2)
NOTES:
1 Rise Time = 7ns max. Input Impedance =
1 megohm. 22pF.
2. Rise Time = 10ns max. Source Impedance =
50 ohms.
trr
+0.5A
0
-0.25A
-1.0A
1cm
SET TIME BASE FOR
10 ns/cm
FIG. 2 - TYPICAL FORWARD
CURRENT DERATING CURVE
AVERAGE FORWARD CURENT, (A)
AMBIENT TEMPERATURE ( )
6.0
5.0
4.0
2.0
3.0
1.0
0
25 50 75 100 125 150 175
0
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
FIG. 3 - TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS REVERSE CURRENT, (uA)
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
TJ = 25
TJ = 100
TJ = 150
100
10
1.0
.1
.01
40
0
20
60
80
100
120
140
FIG. 5 - MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT
PEAK FORWARD SURGE CURRENT, (A)
NUMBER OF CYCLES AT 60Hz
175
150
125
100
75
50
25
0
1
2
5
10
20
50
100
8.3ms Single Half Sine-Wave
(JEDEC Method)
INSTANTANEOUS FORWARD VOLTAGE, (V)
FIG. 4 - TYPICAL INSTANTANEOUS
INSTANTANEOUS FORWARD CURRENT, (A)
0
.2
.4
.6
.8
1.0
1.2
1.4
.01
.1
1
10
100
FORWARD CHARACTERISTICS
Pulse Width = 300uS
1% Duty Cycle
TJ = 25
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