FR251 THRU FR257
FAST RECOVERY RECTIFIER
Reverse Voltage -
50 to 1000 Volts
Forward Current -
2.5 Amperes
Features
Plastic package has Underwriters Laboratory
Flammability Classification 94V-0
Fast switching for high efficiency
Construction utilizes void-free molded plastic technique
2.5 ampere operation at T
A
=85 with no thermal
runaway
High temperature soldering guaranteed:
250 /10 seconds, 0.375(9.5mm) lead length,
5 lbs. (2.3kg) tension
Mechanical Data
Case:
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:
0.021 ounce, 0.60 gram
DIM ENSIONS
DIM
A
B
C
D
inches
Min.
0.138
0.138
0.040
1.000
Max.
0.161
0.161
0.043
-
Min.
3.50
3.50
1.00
25.40
mm
Max.
4.10
4.10
1.10
-
Note
Maximum Ratings and Electrical Characteristics
Symbols
FR251
FR252
@2
5
FR253
unless otherwise specified
FR254
FR255
FR256
FR257
FR257
-STR
Units
Maximum repetitive peak reverse voltage
Maximum RMS voltage
Maximum DC blocking voltage
Average forward rectified current
at T
A
=85
Peak forward surge current
8.3mS single half sine-wave
(MIL-STD-750D 4066 method)
Maximum instantaneous forward voltage
at I
FM
=2.5A, T
A
=25 (Note 3)
Maximum DC reverse current
at rated DC blocking voltage
T
A
=25
T
A
=55
V
RRM
V
RMS
V
DC
I
(AV)
I
FSM
V
F
I
R
T
rr
C
J
T
J
, T
STG
50
35
50
100
70
100
200
140
200
400
280
400
2.5
150.0
1.3
10.0
150.0
600
420
600
800
560
800
1000
700
1000
1000
700
1000
Volts
Volts
Volts
Amps
Amps
Volts
A
Maximum reverse recovery time (Note 1)
Typical junction capacitance (Note 2)
Operating and storage temperature range
150
65.0
250
500
250
nS
F
-65 to +150
Notes:
(1) Reverse recovery test conditions: I
F
=0.5A, I
R
=1.0A, I
rr
=0.25A
(2) Measured at 1.0MHz and applied reverse voltage of 4.0 volts
(3) Pulse test: pulse width 300uSec, Duty cycle 1%
1
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