FR251G THRU FR257G
GLASS PASSIVATED JUNCTION FAST SWITCHING RECTIFIER
Reverse Voltage -
50 to 1000 Volts
Forward Current -
2.5 Amperes
Features
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
Mechanical Data
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
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
1.0
25.40
mm
Max.
4.10
4.10
1.10
-
Note
Maximum Ratings and Electrical Characteristics
Ratings at 25
ambient temperature unless otherwise specified.
Single phase, half wave, 60Hz, resistive or inductive load.
Symbols
FR
251G
FR
252G
FR
253G
FR
254G
FR
255G
FR
256G
FR
257G
Units
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
Peak forward surge current, I
FM
(Surge):
8.3mS single half sine-wave superimposed
on rated load (MIL-STD-750D 4066 method)
Maximum forward voltage @2.5A, 25
Maximum DC reverse current,
@ rated reverse voltage
Reverse recovery time (Note 1)
Typical junction capacitance (Note 2)
Typical thermal resistance (Note 3)
Operating and storage temperature range
T
j
=25
T
j
=125
V
RRM
V
RMS
V
DC
I
(AV)
I
FSM
V
F
I
R
T
rr
C
J
R
JA
50
35
50
100
70
100
200
140
200
400
280
400
2.5
70.0
1.3
5.0
300.0
600
420
600
800
560
800
1000
700
1000
Volts
Volts
Volts
Amps
Amps
Volts
A
150
35.0
22.0
-55 to +150
250
500
nS
F
/W
T
J
, T
STG
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
1
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