SF21G
THRU
SF28G
2.0 AMPS. Glass Passivated Super Fast Rectifiers
Voltage Range
50 to 600 Volts
Current
2.0 Amperes
Features
Low forward voltage drop
High current capability
High reliability
High surge current capability
DO-15
Mechanical Data
Case: Molded plastic
Epoxy: UL 94V-O rate flame retardant
Lead: Axial leads, solderable per MIL-STD-
202, Method 208 guaranteed
Polarity: Color band denotes cathode end
High temperature soldering guaranteed:
260
o
C/10 seconds/.375”,(9.5mm) lead
lengths at 5 lbs., (2.3kg) tension
Mounting position: Any
Weight: 0.40 gram
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%
Symbol SF SF SF SF
Type Number
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified
Current .375(9.5mm) Lead Length
@ T
A
=55℃
Peak Forward Surge Current, 8.3 ms Single
Half Sine-wave Superimposed on Rated
Load (JEDEC method )
Maximum Instantaneous Forward Voltage
@ 2.0A
Maximum DC Reverse Current @ T
A
=25℃
at Rated DC Blocking Voltage @ T
A
=125℃
Maximum Reverse Recovery Time (Note 1)
Typical Junction Capacitance (Note 2)
Typical Thermal Resistance (Note 3)
SF SF SF SF
Units
21G 22G 23G 24G 25G 26G 27G 28G
V
RRM
V
RMS
V
DC
I
(AV)
I
FSM
V
F
I
R
Trr
Cj
R
θ
JA
T
J
50 100 150 200 300 400 500 600
35 70 105 140 210 280 350 420
50 100 150 200 300 400 500 600
2.0
50
0.95
5.0
100
35
40
20
1.3
1.7
V
V
V
A
A
V
uA
uA
nS
pF
℃/W
℃
℃
65
Operating Temperature Range
-65 to +150
Storage Temperature Range
T
STG
-65 to +150
Notes: 1. Reverse Recovery Test Conditions: I
F
=0.5A, I
R
=1.0A, I
RR
=0.25A
2. Measured at 1 MHz and Applied Reverse Voltage of 4.0 V D.C.
3. Mount on Cu-Pad Size 10mm x 10mm on PCB.
- 242 -
RATINGS AND CHARACTERISTIC CURVES (SF21G THRU SF28G)
FIG.1- REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM
trr
+0.5A
(-)
DUT
(+)
50Vdc
(approx)
(-)
PULSE
GENERATOR
(NOTE 2)
1W
NON
INDUCTIVE
OSCILLOSCOPE
(NOTE 1)
(+)
0
-0.25A
AVERAGE FORWARD CURRENT. (A)
50W
NONINDUCTIVE
10W
NONINDUCTIVE
FIG.2- MAXIMUM AVERAGE
FORWARD CURRENT DERATING
3.0
2.5
2.0
1.5
1.0
0.5
0
0
25
50
75 100 125 150 175
o
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
0.375" (9.5mm)
Lead Length
NOTES: 1. Rise Time=7ns max. Input Impedance=
1 megohm 22pf
2. Rise Time=10ns max. Sourse Impedance=
50 ohms
-1.0A
1cm
SET TIME BASE FOR
5/ 10ns/ cm
AMBIENT TEMPERATURE. ( C)
FIG.3- TYPICAL REVERSE CHARACTERISTICS
1000
FIG.4- TYPICAL FORWARD CHARACTERISTICS
100
INSTANTANEOUS REVERSE CURRENT. ( A)
INSTANTANEOUS FORWARD CURRENT. (A)
100
0
10
SF
21
Tj=125 C
10
Tj=75
0
C
6G
F2
~S
G
25
8G
SF
F2
~S
7G
2
SF
S
G~
F2
4G
1
1
Tj=25
0
C
0.1
Tj=25
o
C
Pulse Width=300 s
1% Duty Cycle
0.1
0
20
40
60
80
100
120
140
PERCENT OF RATED PEAK REVERSE VOLTAGE. (%)
0.01
0.4
0.6
0.8
1.0
1.2
1.4
FORWARD VOLTAGE. (V)
1.6
1.8
FIG.5- MAXIMUM NON-REPETITIVE FORWARD SURGE
CURRENT
60
150
FIG.6- TYPICAL JUNCTION CAPACITANCE
PEAK FORWARD SURGE CURRENT. (A)
50
40
8.3ms Single Half Sine Wave
JEDEC Method
JUNCTION CAPACITANCE.(pF)
125
100
30
75
20
50
25
0
SF
21
G~
SF
24
G
SF
25G
~S
F28
G
Tj=25
0
C
10
0
1
2
5
10
20
50
100
NUMBER OF CYCLES AT 60Hz
0.1
0.5
1
2
5
10
20
50
100 200
500
1000
REVERSE VOLTAGE. (V)
- 243 -
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