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) Thermal resistance from junction to ambient at 0.375 (9.5mm) lead length, P.C.B. mounted
Symbols
FR
251G
FR
252G
FR
253G
FR
254G
FR
255G
FR
256G
FR
257G
Units
Maximum repetitive peak reverse voltage
V
RRM
50
100
200
400
600
800
1000
Volts
Maximum RMS voltage
V
RMS
35
70
140
280
420
560
700
Volts
Maximum DC blocking voltage
V
DC
50
100
200
400
600
800
1000
Volts
Maximum average forward rectified current
0.375" (9.5mm) lead length at T
A
=55
I
(AV)
2.5
Amps
Peak forward surge current, I
FM
(Surge):
8.3mS single half sine-wave superimposed
on rated load (MIL-STD-750D 4066 method)
I
FSM
70.0
Amps
Maximum forward voltage @2.5A, 25
V
F
1.3
Volts
Maximum DC reverse current, T
j
=25
@ rated reverse voltage T
j
=125
I
R
5.0
300.0
A
Reverse recovery time (Note 1)
T
rr
150
250
500
nS
Typical junction capacitance (Note 2)
C
J
35.0
F
Typical thermal resistance (Note 3)
R
JA
22.0
/W
Operating and storage temperature range
T
J
, T
STG
-55 to +150
Features
Mechanical Data
FR251G THRU FR257G
GLASS PASSIVATED JUNCTION FAST SWITCHING RECTIFIER
Reverse Voltage -
50 to 1000 Volts
Forward Current -
2.5 Amperes
Plastic package has Underwriters Laboratory
Flammability Classification 94V-0 utilizing
Flame retardant epoxy molding compound
Glass passivated junction in R-3 package
2.5 ampere operation at T
A
=55 with no thermal runaway
Fast switching for high efficiency
Case: Molded plastic, R-3
Terminals: Axial leads, solderable per
MIL-STD-202, method 208
Polarity: Band denotes cathode
Mounting Position: Any
Weight: 0.021 ounce, 0.60 gram
Maximum Ratings and Electrical Characteristics
1
Ratings at 25 ambient temperature unless otherwise specified.
Single phase, half wave, 60Hz, resistive or inductive load.
DIMENSIONS
DIM
inches
mm
Note
Min.
Max.
Min.
Max.
A
0.138
0.161
3.50
4.10
B
0.138
0.161
3.50
4.10
C
0.040
0.043
1.0
1.10
D
1.000
-
25.40
-
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