FR251 THRU FR257
Features
· Fast switching
· Low leakage
· Low forward voltage drop
· High current capability
· High current surge
· High reliability
CURRENT 2.5 Amperes
VOLTAGE 50 to 1000 Volts
DO-201AD
0.210(5.3)
0.188(4.8)
DIA.
1.0(25.4)
MIN.
0.375(9.5)
0.285(7.2)
Mechanical Data
· Case : JEDEC DO-201AD molded plastic body
· Terminals : Plated axial lead solderable per MIL-STD-750,
method 2026
· Polarity : Color band denotes cathode end
· Mounting Position : Any
· Weight : 0.041 ounce, 1.18 gram
0.042(1.1)
0.037(0.9)
DIA.
1.0(25.4)
MIN.
Dimensions in inches and (millimeters)
Maximum Ratings And Electrical Characteristics
(Ratings at 25℃ ambient temperature unless otherwise specified, Single phase, half wave 60Hz, resistive or inductive
load. For capacitive load, derate by 20%)
Symbols
Maximum recurrent peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forward rectified current
0.375"(9.5mm) lead length T
A
=75℃
Peak forward surge current 8.3ms single
half sine-wave superimposed on rated load
(JEDEC) method
Maximum instantaneous forward voltage
at 2.5A
Maximum DC reverse current at rated DC
blocking voltage
Maximum full load reverse current full cycle
average. 0.375"(9.5mm) lead length at
T
L
=55℃
Maximum reverse recovery time (Note 1)
Typical junction capacitance (Note 2)
Operating junction and storage
temperature range
I
R
V
RRM
V
RMS
V
DC
I
(AV)
FR
251
50
35
50
FR
252
100
70
100
FR
253
200
140
200
FR
254
400
280
400
2.5
FR
255
600
420
600
FR
256
800
560
800
FR
257
1000
700
1000
Units
Volts
Volts
Volts
Amps
I
FSM
150
1.3
5.0
Amps
Volts
V
F
μA
100
Trr
C
J
T
J
T
STG
150
60
-65 to +150
250
500
ns
pF
℃
Notes:
(1) Test conditions: I
F
=0.5A, I
R
=1.0A, I
rr
=0.25A.
(2) Measured at 1MHz and applied reverse voltage of 4.0 Volts.
RATINGS AND CHARACTERISTIC CURVES FR251 THRU FR257
FIG.1-TYPICAL FORWARD CURRENT
DERATING CURVE
AVERAGE FORWARD CURRENT(A)
2.5
PEAK FORWARD SURGE CURRENT(AMPERES)
2.0
1.5
1.0
0.5
0
0
25
50
75
100
125
150
175
SINGLE PHASE HALF WAVE 60Hz
RESISTIVE OR INDUCTIVE LOAD
FIG.2-MAXIMUM NON-REPETITIVE
FORWARD SURGE CURRENT
150
8.3m SINGLE HALF SINE WAVE
(JEDEC Method)
125
100
75
50
25
0
1
2
4
6
8 10
AMBIENT TEMPERATURE (
℃)
FIG.3-TYPICAL INSTANTANEOUS FORWARD
CHARACTERISTICS
20
40
60
100
NUMBER OF CYCLES AT 60Hz
20
INSTANTANEOUS FORWARD CURRENT(AMPERES)
10
FIG.4-TYPICAL JUNCTION CAPACITANCE
200
100
JUNCTION CAPACITANCE(pF)
60
40
20
10
6
4
2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
1
0.1 0.2
0.4
1
2
4
10
20
40
100
REVERSE VOLTAGE. (V)
T
J
=25℃
3
1
0.3
0.1
T
J
=25℃
0.03
0.01
Pulse Width=300mS
1% Duty Cycle
INSTANTANEOUS FORWARD VOLTAGE (VOLTS)
FIG.5-TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC
50W
NON INDUCTIVE
10W
NON INDUCTIVE
+0.5A
Trr
(+)
25Vdc
(APPROX)
D.U.T.
PULSE
GENERATOR
(NOTE2)
0
-0.25A
(
)
NON IN-
DUCTIVE
1W
OSCILLOSCOPE
(NOTE1)
-1.0A
1cm
SET TIME BASE FOR 50/100 ns/cm
NOTES: 1.Rise Time=7ns max. input impedance=1
megohm 22pF
2.Rise Time=10ns max. source impedance
=50 ohms
stm32/stm8
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