UF800 thru UF808
ULTRAFAST SWITCHING RECTIFIERS
CHENG- YI
ELECTRONIC
VOLTAGE RANGE
-50 TO 800 VOLTS
CURRENT
-8.0 Amperes
TO-220AC
FEATURES
Plastic package has Underwriters Laboratory
Flammability Classification 94V-O utilizing
Flame Retardant Epoxy Molding Compound.
Exceeds environmental standards of MIL-
S-19500/228.
Low power loss, high efficiency.
Low forward voltage, high current capability.
High surge capacity.
Ultra fast recovery times, high voltage.
MECHANICAL DATA
Case: TO-220AC molded plastic
Terminals: Lead solderable per
MIL-STD-202, Method 208
Polarity: As marked.
Mounting position: Any
Weight: 0.08 ounces, 2.24 grams.
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
0
C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, reistive or inductive load.
For capacitive load, derate current by 20%.
TYPY NUMBER
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current
.375"(9.5mm) lead length
@ T
C
=100 C
0
UF800
50
35
50
UF801
100
70
100
UF802
200
140
200
UF803
300
210
300
8.0
UF804
400
280
400
UF806
600
420
600
UF808
800
560
800
UNITS
V
V
V
A
Peak Forward Surge Current,
8.3 ms single half sine-wave
superimposed on rated load (JEDEC method)
Maximum Instantaneous Forward Voltage at 8.0A
Maximum D.C Reverse Current
at Rated D.C Blocking Voltage
@ T
A=
25
0
C
@ T
A
=125 C
0
125
A
1.0
1.3
10
500
50
80
15
-50 to +150
1.7
V
A
A
100
50
0
Maximum Reverse Recovery Time (Note 1)
Typical Junction Capacitance (Note 2)
Typical Junction Resistance (Note 3) R JA
Operating and Storage Temperature Range T
j
, T
STG
Ns
pF
C/W
0
C
Notes : 1. Reverse Recovery 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 4.0V D.C.
3. Thermal resistance from
junction
to ambient and from
junction
to lead length 0.375" (9.5mm) P
.C.B. Mounted.
UF800 thru UF808
ULTRAFAST SWITCHING RECTIFIERS
CHENG- YI
ELECTRONIC
RATING AND CHARACTERISTICS CURVES
UF800 THRU UF808
Fig. 1 - REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM
50
Noninductive
10
Noninductive
trr
+0.5A
( )
PULSE
GENERATOR
NOTE 2
(+)
25 Vdc
(approx)
( )
D.U.T.
0
-0.25
1
NON-
Inductive
OSCILLOSCOPE
NOTE 1
(+)
NOTES:1. Rise Time=7ns max.
Input Impedance=1 megohm. 22pF
2. Rise Time=10ns max.
Source Impedance=50 Ohms.
-1.0
SET TIME
BASE FOR
10ns/cm
1cm
Fig. 1 - TYPICAL FORWARD CURRENT DERATING CURVE
20
16
12
8
4
0
Fig. 2 - TYPICAL REVERSE CHARACTERISTICS
INSTANTANEOUS RECTIFIED CURRENT, MICROAMPERES.
1000
PEAK FORWARD CURRENT.
AMPERES
100
TJ=125 C
0
0
50
100
o
150
10
CASE TEMPERATURE, C
TJ=25C
1.0
0
Fig. 3 - MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT
PEAK FORWARD CURRENT.
AMPERES
125
100
75
50
25
T
J
=25 C
8.3ms Single Half Since-Wave
JEDEC Method
0
0.1
20
40
60
80
100 120 140
PERCENT OF RATED PEAK REVERSE VOLTAGE
1
2
5
10
20
50
100
Fig. 5 - TYPICAL FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD CURRENT, (A)
80
40
20
10
3.0
1.0
0.3
0.1
0.03
0.01
0.4 0.6 0.8 1.0 1.2 1.4 1.8
Munber of cycles at 60 H
Z
Fig. 4 - TYPICL JUNCTION CAPACITANCE
210
UF800
CAPACITANCE. (pF)
200
160
120
80
UF808
UF800
40
0
1
2
5
10
20
50 100
200
500
UF808
REVERSE VOLT
AGE, VOLTS
FORWARD VOLT
AGE, VOLTS
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