- 182 -
.272(6.9)
.248(6.3)
.543(13.8)
.512(13.2)
.110(2.8)
.098(2.5)
.606(15.5)
.583(14.8)
.112(2.85)
.100(2.55)
.134(3.4)DIA
.113(3.0)DIA
PIN 1
PIN 3
PIN 2
SRF2020 THRU SRF2060
Isolation 20.0 AMPS. Schottky Barrier Rectifiers
Voltage Range
20 to 60 Volts
Current
20.0 Amperes
Features
Low
forward
voltage
drop
High current capability
High
reliability
High surge current capability
Mechanical Data
Cases: ITO-220AB molded plastic
Epoxy: UL 94V-O rate flame retardant
Terminals: Lead solderable per MIL-STD-750,
Method 2026 guaranteed
Polarity: As marked
High temperature soldering guaranteed:
260
O
C/10 seconds .25",(6.35mm) from
case.
Weight: 2.24 grams
Mounting torque: 5 in 1bs. max.
ITO-220AB
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
SRF
2020
SRF
2030
SRF
2040
SRF
2050
SRF
2060
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
See Fig. 1
I
(AV)
20.0 A
Peak Forward Surge Current, 8.3 ms Single
Half Sine-wave Superimposed on Rated Load
(JEDEC method )
I
FSM
250 A
Maximum Instantaneous Forward Voltage
@ 10.0A
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
50
mA
mA
Typical Thermal Resistance (Note 1)
R
JC
1.5
/W
Typical Junction Capacitance (Note 2)
Cj
440 300
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"x6"x0.25")
Al-Plate.
2. Measured at 1MHz and Applied Reverse Voltage of 4.0V D.C.
- 183 -
RATINGS AND CHARACTERISTIC CURVES (SRF2020 THRU SRF2060)
FIG.3- TYPICAL REVERSE CHARACTERISTICS
PER LEG
INST
ANT
ANEOUS
REVERSE
CURRENT
.
(mA)
0
20
40
60
80
100
120
140
.001
.01
.10
1.0
10
PERCENT OF RATED PEAK REVERSE VOLTAGE. (%)
Tj=100 C
0
Tj=25
C
0
Tj=75
C
0
FIG.1- FORWARD CURRENT DERATING CURVE
A
VERAGE
FOR
W
ARD
CURRENT
.
(A)
0
50
100
150
0
4.0
8.0
12.0
16.0
20.0
CASE TEMPERATURE. ( C)
o
S
R
F2050-60
SRF2020-40
FIG.2- MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT PER LEG
PEAK
FOR
W
ARD
SURGE
CURRENT
.
(A)
1
2
5
10
20
100
50
0
50
200
150
100
250
300
NUMBER OF CYCLES AT 60Hz
8.3ms SINGLE HALF SINE WAVE
PER LEG. (JEDGE METHOD)
Tj=Tj max.
FIG.4- TYPICAL FORWARD CHARACTERISTICS
PER LEG
INST
ANT
ANEOUS
FOR
W
ARD
CURRENT
.
(A)
.2
.3
.4
.5
.6
.7
.8
.9
0.1
1.0
10
100
INSTANTANEOUS FORWARD VOLTAGE. (V)
SR
F2
050
-2
06
0
SRF2020-2040
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
80100
100
200
400
600
800
2000
1000
4000
REVERSE VOLTAGE. (V)
Tj=25 C
f=1.0MHz
Vsig=50mVp-p
0
SRF2050-2060
SRF2020-2040
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