BL
FEATURES
GALAXY ELECTRICAL
SF21G - - - SF28G
VOLTAGE RANGE: 50 ---
600
V
CURRENT:
2.0
A
GLASS PASSIVATED RECTIFIERS
Low cost
Glass passivated junction
Low forward voltage drop
High current capability
Easily cleaned with alcohol,Isopropanol
and similar solvents
The plastic material carries U/L recognition 94V-0
DO -
15
MECHANICAL DATA
Case:JEDEC DO--15,molded plastic
Terminals: Axial lead ,solderable per
MIL- STD-202,Method 208
Polarity: Color band denotes cathode
Weight: 0.014 ounces,0.39 grams
Mounting position: Any
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
ambient temperature unless otherwise specified.
Single phase,half wave,60 Hz,resistive or inductive load. For capacitive load,derate by 20%.
SF21
G
Maximum recurrent peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forw ard rectified current
9.5mm lead length,
@T
A
=75
SF22 SF23 SF24
G
G
G
100
70
100
150
105
150
200
140
200
2.0
SF25 SF26
SF27 SF28
UNITS
G
G
G
G
300
210
300
400
280
400
500
350
500
600
420
600
V
V
V
A
V
RRM
V
RMS
V
DC
I
F(AV)
50
35
50
Peak forw ard surge current
8.3ms single half-sine-w ave
superimposed on rated load
@T
J
=125
I
FSM
50
A
Maximum instantaneous forw ard voltage
@
2.0A
Maximum reverse current
@T
A
=25
V
F
I
R
t
rr
C
J
R
θ
JA
T
J
T
STG
0.95
5.0
50.0
35
60
20
- 55 ----- + 175
- 55 ----- + 175
1.3
1.7
V
A
ns
at rated DC blocking voltage @T
A
=125
Maximum reverse recovery time
Typical junction capacitance
Typical thermal resistance
(Note1)
(Note2)
(Note3)
30
pF
/W
Operating junction temperature range
Storage temperature range
NOTE: 1. Measured with I
F
=0.5A, I
R
=1A, I
rr
=0.25A.
www.galaxycn.com
2. Measured at 1.0MH
Z
and applied rev erse v oltage of 4.0V DC.
3. Thermal resistance f rom junction to ambient.
Document Number 0269033
BL
GALAXY ELECTRICAL
1.
RATINGS AND CHARACTERISTIC CURVES
SF21G - - - SF28G
FIG.1 -- TEST CIRCUIT DIAGRAM AND REV ERSE RECOVERY TIM E CHARACTERISTIC
t
rr
50
N 1.
10
N 1.
+ 0 .5 A
D.U.T.
(+)
25VDC
(approx)
(-)
1
NONIN-
DUCTIVE
PULSE
GENERATOR
(NOTE2)
OSCILLOSCOPE
(NOTE 1)
0
-0 .2 5 A
-1 .0 A
1 c m
N OTES:1 .R ISE TIME = 7n s MAX.IN PU T IMPED AN C E = 1M .2 2p F.
JJJJJ2.R
ISE TIME =10 ns MAX.SOU R C E IMPED AN C E=5 0 .
SE T TIM E BA SE FOR 10 ns/cm
FIG.2 -- TYPICAL FORW ARD CHARACTERISTIC
INSTANTANEOUS FORWARD CURRENT
100
FIG.3 -- FORW ARD DERATING CURVE
z
AVERAGE FORWARD CURRENT
3.0
2.5
Single Phase
Half Wave 60H
Z
Resistive or
Inductive Load
0.375"(9.5mm)Lead Length
AMPERES
10
SF
2
1
G
~S
F
2
4
G
AMPERES
SF
25
G
~
SF
SF
26
2
7
G
G
~
SF
2
8
G
2.0
1.5
1.0
0.5
0
0
1
0.1
25
50
75
100
125
150
175
0.01
.4
Tj=25
o
C
Pulse Width=300 s
1% Duty Cycle
.6
.8
1.0
1.2
1.4
1.6
1.8
INSTA NTANE OUS FORW ARD VOLTAGE , VOLTS
A M BIENT TE M P ERA TURE,
FIG.4 -- TYPICAL JUNCTION CAPACITANCE
FIG.5 -- PEAK FORW ARD SURGE CURRENT
PEAK FORWARD SURGE CURRENT
JUNCTION CAPACITANCE,pF
200
100
60
40
20
10
6
4
T
J
=25
SF25G - SF28G
SF21G - SF24G
70
60
50
8.3ms Single Half
Sine-Wave
40
30
20
10
0
1
5
10
50
100
2
1
0.1 0.2
0.4
1
2
4
10 20
40
100
REV ERS E V OLTA GE ,VOLTS
AMPERES
NUM B ER OF CYCLES AT 60Hz
www.galaxycn.com
Document Number 0269033
BL
GALAXY ELECTRICAL
2.
Microcontroller MCU
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