- 162 -
SR4020PT THRU SR4060PT
40.0 AMPS. Schottky Barrier Rectifiers
Voltage Range
20 to 60 Volts
Current
40.0 Amperes
Features
Dual rectifier construction, positive center-tap
Plastic package has Underwriters Laboratory Flammability
Classifications 94V-0
Metal silicon junction, majority carrier conduction
Low power loss, high efficiency
High current capability, low VF
High surge capability
Epitaxial construction
For use in low voltage, high frequency inverters,
free wheeling, and polarity protection applications
High temperature soldering guaranteed:
260
O
C/ 10 seconds, 0.17"(4.3mm)lead lengths at 5 lbs.,
(2.3kg) tension
Mechanical Data
Cases: JEDEC TO-3P/TO-247AD molded plastic
Terminals: Leads solderable per MIL-STD-750, Method 2026
Polarity: As marked
Mounting position: Any
Weight: 0.2 ounce, 5.6 grams
TO-3P/TO-247AD
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characteristics
Rating at 25
ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%
Type Number
Symbol
SR
4020PT
SR
4030PT
SR
4040PT
SR
4050PT
SR
4060PT
Units
Maximum Recurrent Peak Reverse Voltage
V
RRM
20 30 40 50 60 V
Maximum RMS Voltage
V
RMS
14 21 28 35 42 V
Maximum DC Blocking Voltage
V
DC
20 30 40 50 60 V
Maximum Average Forward Rectified Current at
Tc=100
I
(AV)
40 A
Peak Forward Surge Current, 8.3 ms Single Half
Sine-wave Superimposed on Rated Load (JEDEC
method )
I
FSM
400 A
Maximum Instantaneous Forward Voltage 20.0A
(Note 3)
V
F
0.55 0.70
V
Maximum D.C. Reverse Current @ Tc=25
at Rated DC Blocking Voltage @ Tc=100
I
R
1.0
75
mA
mA
Typical Thermal Resistance Per Leg (Note 1)
R
JC
1.2
/W
Typical Junction Capacitance (Note 2)
Cj
1100 600
pF
Operating Junction Temperature Range
T
J
-65 to +125
-65 to +150
Storage Temperature Range
T
STG
-65 to +150
Notes: 1. Thermal Resistance from Junction to Case Per Leg, with Heatsink size (4" x 6" x 0.25")
Al-Plate.
2. Measured at 1 MHz and Applied Reverse Voltage of 4.0V D.C.
3. 300 us Pulse Width, 2% Duty Cycle
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RATINGS AND CHARACTERISTIC CURVES (SR4020PT THRU SR4060PT)
FIG.2- TYPICAL REVERSE CHARACTERISTICS
PER LEG
INST
ANT
ANEOUS
REVERSE
CURRENT
.(
m
A
)
0
20
40
60
80
100
120
140
.001
.01
.10
1.0
10
PERCENT OF RATED PEAK REVERSE VOLTAGE. (%)
Tc=125
C
0
Tc=150
C
0
Tc=25
C
0
Tc=75
C
0
FIG.1- FORWARD CURRENT DERATING CURVE
A
VERAGE
FOR
W
ARD
CURRENT
.
(A)
0
50
100
150
0
10
20
30
40
CASE TEMPERATURE. ( C)
o
SR4050-60PT
SR4020-40PT
FIG.3- MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT PER LEG
PEAK
FOR
W
ARD
SURGE
CURRENT
.
(A)
1
2
5
10
20
100
50
100
300
200
400
NUMBER OF CYCLES AT 60Hz
8.3ms SINGLE HALF SINE WAVE
PER LEG. (JEDEC METHOD)
Tj=Tj max.
FIG.4- TYPICAL FORWARD CHARACTERISTICS
PER LEG
INST
ANT
ANEOUS
FOR
W
ARD
CURRENT
.
(A)
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.1
1.0
10
100
INSTANTANEOUS FORWARD VOLTAGE. (V)
SR4020PT THRU
SR4040PT
SR4050PT THRU
SR4060PT
Tj=25 C
PULSE WIDTH-300 S
1% DUTY CYCLE
0
FIG.5- TYPICAL JUNCTION CAPACITANCE PER LEG
JUNCTION
CAP
ACIT
ANCE.(pF)
0.1
1.0
0.4
4
10
40
80 100
100
200
400
600
800
2000
1000
4000
REVERSE VOLTAGE. (V)
SR4050-60PT
SR4020-40PT
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