UG18ACT THRU UG18DCT
ULTRAFAST EFFICIENT PLASTIC RECTIFIER
Reverse Voltage - 50 to 200 Volts Forward Current - 18.0 Amperes
FEATURES
Plastic package has Underwriters Laboratories
Flammability Classification 94V-0
Ideally suited for use in very
high frequency switching
power supplies, inverters
and as a free wheeling diode
Ultrafast 25 nanosecond reverse recovery times
Soft recovery characteristics
Excellent high temperature switching
Glass passivated junctions
High temperature soldering guaranteed:
250C, 0.16" (4.06mm) case for 10 seconds
MECHANICAL DATA
Case: JEDEC TO-220AB molded plastic body over
passivated chips
Terminals: Plated leads solderable per MIL-STD-750,
Method 2026
Polarity: As marked
Mounting Position: Any
Mounting Torque: 5 in. - lbs. max.
Weight: 0.08 ounce, 2.24 grams
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25C ambient temperature unless otherwise specified.
SYMBOLS
UG18ACT
UG18BCT
UG18CCT
UG18DCT
UNITS
Maximum repetitive peak reverse voltage
V
RRM
50
100
150
200
Volts
Maximum RMS voltage
V
RMS
35
70
105
140
Volts
Maximum DC blocking voltage
V
DC
50
100
150
200
Volts
Maximum average forward rectified current at T
C
=105C
I
(AV)
18.0
Amps
Peak forward surge current
8.3ms single half sine-wave superimposed
I
FSM
175.0
Amps
on rated load (JEDEC Method) per leg at T
C
=105C
Maximum instantaneous forward voltage per leg at 9.0A
1.10
20A
1.20
5.0A, T
J
=100C
V
F
0.95
Volts
Maximum DC reverse current
T
A
=25C
10.0
at rated DC blocking voltage per leg
T
A
=100C
I
R
300.0
A
Maximum reverse recovery time per leg
(NOTE 1)
t
rr
20.0
ns
Maximum reverse recovery time per leg T
J
=25C
30.0
(NOTE 2)
T
J
=100C
t
rr
50.0
ns
Maximum recovered stored charge per leg T
J
=25C
20.0
(NOTE 2)
T
J
=100C
Q
rr
45.0
nC
Typical junction capacitance per leg
(NOTE 3)
C
J
30.0
pF
Typical thermal resistance per leg
(NOTE 4)
R
JC
4.0
C/W
Operating junction and storage temperature range
T
J
, T
STG
-65 to +150
C
NOTES: (1) Reverse recovery test conditions: I
F
=0.5A, I
R
=1.0A, Irr=0.25A
(2) t
rr
and Q
rr
measured at: I
F
=9.0A, V
R
=30V, di/dt=50A/
s, I
rr=
10% I
RM
(3) Measured at 1.0 MH
Z
and applied reverse voltage of 4.0 Volts
(4) Thermal resistance from junction to case per leg
4/98
0.415 (10.54) MAX.
0.154 (3.91)
0.148 (3.74)
DIA.
0.113 (2.87)
0.103 (2.62)
0.185 (4.70)
0.175 (4.44)
0.055 (1.39)
0.045 (1.14)
0.145 (3.68)
0.135 (3.43)
0.350 (8.89)
0.330 (8.38)
0.160 (4.06)
0.140 (3.56)
0.037 (0.94)
0.027 (0.68)
0.205 (5.20)
0.195 (4.95)
0.560 (14.22)
0.530 (13.46)
0.022 (0.56)
0.014 (0.35)
0.110 (2.79)
0.100 (2.54)
PIN
1
2
3
PIN 1
PIN 3
CASE
1.148 (29.16)
1.118 (28.40)
0.105 (2.67)
0.095 (2.41)
0.410 (10.41)
0.390 (9.91)
0.105 (2.67)
0.095 (2.41)
0.635 (16.13)
0.625 (15.87)
0.560 (14.22)
0.530 (13.46)
PIN 2
0.370 (9.40)
0.360 (9.14)
Dimensions in inches and (millimeters)
TO-220AB
0
25
50
75
100
125
150
175
0
4.0
8.0
12
16
20
24
1
10
100
10
100
1,000
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0.01
0.1
1
10
100
0.1
1
10
100
1
10
100
0
25
50
75
100
125
150
175
0
10
20
30
40
50
60
0
20
40
60
80
100
0.01
0.1
1
10
100
1,000
FIG. 1 -FORWARD CURRENT DERATING CURVE
CASE TEMPERATURE, C
A
VERA
GE FOR
W
ARD CURRENT
,
AMPERES
FIG. 3 - TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS PER LEG
T
J
=25C
PULSE WIDTH=300
s
1% DUTY CYCLE
di/dt=100A/
s
di/dt=20A/
s
di/dt=50A/
s
di/dt=100A/
s
di/dt=50A/
s
di/dt=150A/
s
di/dt=20A/
s
I
F
=9.0A
V
R
=30V
t
rr
Q
rr
FIG. 4 - TYPICAL REVERSE CHARACTERISTICS
PER LEG
INSTANTANEOUS FORWARD VOLTAGE,
VOLTS
INST
ANT
ANEOUS FOR
W
ARD CURRENT
,
AMPERES
8.3ms SINGLE HALF SINE-WAVE
(JEDEC Method)
T
C
=105
C
FIG. 2 - MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT PER LEG
PEAK FOR
W
ARD SURGE CURRENT
,
AMPERES
REVERSE VOLTAGE, VOLTS
JUNCTION TEMPERATURE, C
T
J
=125
C
f=1.0 MHz
Vsig=50MVp-p
NUMBER OF CYCLES AT 60 H
Z
T
J
=125C
INST
ANT
ANEOUS REVERSE LEAKA
GE CURRENT
,
MICR
O
AMPERES
PERCENT OF RATED PEAK REVERSE
VOLTAGE, %
FIG. 6 - TYPICAL JUNCTION CAPACITANCE PER LEG
FIG. 5 - REVERSE SWITCHING CHARACTERISTICS
PER LEG
JUNCTION CAP
A
C
IT
ANCE, pF
ST
ORED CHARGE/REVERSE
RECO
VER
Y TIME,
nC/ns
T
J
=100C
T
J
=25C
RESISTIVE OR INDUCTIVE LOAD
RATINGS AND CHARACTERISTIC CURVES UG18ACT THRU UG18DCT
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