LESHAN RADIO COMPANY, LTD.
FR251 thru FR257
1.Feature & Dimensions
* Plastic package has Underwriters Laboratory
Flammability Classification 94V-0
* High temperature metallurgically bonded construction
* Deffused junction
* Capable of meeting environmental standards of MIL-S-19500
* 2.5 A operation at TA=55°C with no thermal runaway
* For use in high frequency rectifier circuits
* Fast switching for high efficiency
* Typical IR less than 1.0µA
* High temperature soldering guaranteed:
260°C/10 seconds
* 0.375" (9.5mm) lead length, 5 lbs. (2.3kg) tension
Fast Switching Rectifiers
Reverse Voltage 50 to 1000V
Forward Current 2.5A
2.Mechanical Data
Case:
JEDEC R-3, molded plastic body
Terminals:
Plated axial leads, solderable per
MIL-STD-750, Method 2026
Polarity:
Color band denotes cathode end
Mounting Position:
Any
Weight:
0.015 oz., 0.40 g
Handling precautin:None
We declare that the material of product
compliance with RoHS requirements.
3.Electrical Characteristic
Maximum Ratings & Thermal Characteristics Ratings
at 25°C ambient temperature unless otherwise specified.
Parameter Symbol
Maximum repetitive peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Maximum average forward rectified current
0.375" (9.5mm) lead length at T
A
= 55°C
Peak forward surge current 8.3ms single half
sine-wave superimposed on rated load (JEDEC
Method)
Maximum full load reverse current, full cycle
average,0.375"(9.5mm) lead lengths at T
A
= 55°
C
Typical thermal resistance (Note 2)
symbol
V
RRM
V
RMS
V
DC
IF(AV)
I
FSM
FR
251
50
35
50
FR
252
100
70
100
FR
253
200
140
200
FR
254
400
280
400
FR
255
600
420
600
2.5
150
FR
255P
600
420
600
FR
256
800
560
800
FR
257
1000
700
1000
FR
257P
1000
700
1000
Unit
V
V
V
A
A
IR(AV)
RθJA
100
45
–50 to +150
FR
251
FR
252
FR
253
FR
254
FR
255
1.3
5.0
200
250
15
FR
255P
FR
256
FR
257
FR
257P
µA
°C/W
°C
Operating junction and storage temperature range TJ, TSTG
Electrical Characteristics Ratings
at 25°C ambient temperature unless otherwise specified.
Parameter Symbol
Maximum instantaneous forward voltage at 2.5A
Maximum DC reverse current TA = 25°C
at rated DC blocking voltage TA = 100°C
Typical reverse recovery time (Note 1)
Typical junction capacitance at 4.0V, 1MHz
symbol
V
F
IR
trr
CJ
150
Unit
V
µA
150
500
250
ns
PF
NOTES:
1. IF = 0.5A, IR = 1.0A, IRR = 0.25A
2. Thermal resistance from junction to ambient at 0.375” (9.5mm) lead length, P.C.B. mounted
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LESHAN RADIO COMPANY, LTD.
4. Characteristic Curves
( TA = 25°C unless otherwise noted )
Fig. 1
–
Forward Current Derating Curve
Average Forward Rectified Current (A)
60 Hz
Resistive or
Inductive Load
Fig. 2
–
Maximum Non-repetitive Peak
Forward Surge Current
Average Forward Rectified Current (A)
TJ = TJ max
8.3ms Single Half Sine-wave
(JEDEC Method)
2.5
150
1.25
75
0.375" (9.5mm) Lead Length
0
0
25
50 75 100 125 150 175
Ambient Temperature, °C
0
1
10
Number of Cycles at 60Hz
100
Instantaneous Forward Current (A)
Instantaneous Reverse Current (µA)
100
Fig 3.
–
Typical Instantaneous Forward
Characteristics
TJ = 25°C
Pulse width = 300µs
1% Duty Cycle
Fig 4.
–
Typical Reverse Characteristics
100
Tj=125℃
10
10
Tj=75℃
1.0
1
Tj=25℃
0.1
0.1
0.01
0.6
0.8
1.0
1.2
1.4
1.6
Instantaneous Forward Voltage (V)
0.01
0
20
40
60
80
100
Percent of Rated Peak Reverse Voltage (%)
Fig 6.
–
Typical Junction Capacitance
Transient thermal impedance(°C/W)
Junction Capacitance (pF)
100
Fig 5.
–typical
transient thermal
impedance
20
10
TJ = 25°C
f = 1.0 MHz
Vsig = 50mVp-p
10
1.0
0.1
0.01
0.1
1.0
10
t,Pulse duration,sec
100
1.0
0.1
1
10
Reverse Voltage (V)
100
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