FR251G - FR257G-STR
PRV : 50 - 1000 Volts
Io : 2.5 Amperes
FEATURES :
*
*
*
*
*
*
*
Glass passivated chip
High current capability
High reliability
Low reverse current
Low forward voltage drop
Fast switching for high efficiency
Pb / RoHS Free
GLASS PASSIVATED JUNCTION
FAST RECOVERY RECTIFIERS
D2A
0.161 (4.1)
0.154 (3.9)
1.00 (25.4)
MIN.
0.284 (7.2)
0.268 (6.8)
MECHANICAL DATA :
* Case : D2A Molded plastic
* Epoxy : UL94V-O rate flame retardant
* Lead : Axial lead solderable per MIL-STD-202,
Method 208 guaranteed
* Polarity : Color band denotes cathode end
* Mounting position : Any
* Weight : 0.645 gram
Rating at 25
°
C ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.
0.040 (1.02)
0.0385 (0.98)
1.00 (25.4)
MIN.
Dimensions in inches and ( millimeters )
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
RATING
Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Current
0.375"(9.5mm) Lead Length
Peak Forward Surge Current,
Ta = 75
°C
SYMBOL FR251G FR252G FR253G FR254G FR255G FR256G FR257G
FR257G
UNIT
-STR
V
RRM
V
RMS
V
DC
I
F(AV)
50
35
50
100
70
100
200
140
200
400
280
400
2.5
600
420
600
800
560
800
1000
700
1000
1000
700
1000
V
V
V
A
8.3ms Single half sine wave superimposed
on rated load (JEDEC Method)
Maximum Peak Forward Voltage at I
F
= 2.5 A
Maximum DC Reverse Current
at Rated DC Blocking Voltage
Ta = 25
°C
Ta = 100
°C
I
FSM
V
F
I
R
I
R(H)
Trr
80
1.3
10
500
150
15
- 65 to + 150
- 65 to + 150
250
500
250
A
V
µA
µA
ns
pf
°C
°C
Maximum Reverse Recovery Time ( Note 1 )
Typical Junction Capacitance ( Note 2 )
Junction Temperature Range
Storage Temperature Range
C
J
T
J
T
STG
Notes :
( 1 ) Reverse Recovery Test Conditions : I
F
= 0.5 A, I
R
= 1.0 A, Irr = 0.25 A.
( 2 ) Measured at 1.0 MHz and applied reverse voltage of 4.0 V
DC
Page 1 of 2
Rev. 02 : March 24, 2005
RATING AND CHARACTERISTIC CURVES ( FR251G - FR257G-STR )
FIG.1 - REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM
50
Ω
10
Ω
+ 0.5
D.U.T.
50 Vdc
(approx
)
1
Ω
PULSE
GENERATOR
( NOTE 2 )
OSCILLOSCOPE
( NOTE 1 )
0
- 0.25
Trr
+
- 1.0 A
SET TIME BASE FOR 50/100 ns/cm
NOTES : 1. Rise Time = 7 ns max., Input Impedance = 1 megaohm, 22 pF.
2. Rise time = 10 ns max., Source Impedance = 50 ohms.
3. All Resistors = Non-inductive Types.
1 cm
FIG.2 - DERATING CURVE FOR OUTPUT
RECTIFIED CURRENT
2.5
10
FIG.3 - MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT
PEAK FORWARD SURGE
CURRENT, AMPERES
8.3 ms SINGLE HALF SINE WAVE
Ta = 50
°C
AVERAGE FORWARD OUTPUT
CURRENT, AMPERES
2.0
80
1.5
60
1.0
40
0.5
60Hz RESISTIVE OR INDUCTIVE LOAD
0
0
25
50
75
100
125
150
175
20
0
1
2
4
6
10
20
40
60 100
AMBIENT TEMPERATURE, (
°
C)
FIG.4 - TYPICAL FORWARD CHARACTERISTICS
100
10
Pulse Width = 300
µs
2% Duty Cycle
T
J
= 25
°C
10
NUMBER OF CYCLES AT 60Hz
FIG.5 - TYPICAL REVERSE CHARACTERISTICS
FORWARD CURRENT, AMPERES
T
J
= 100
°C
REVERSE CURRENT,
MICROAMPERES
1.0
1.0
0.1
T
J
= 25
°C
0.1
0.01
0
20
40
60
80
100
120
140
PERCENT OF RATED REVERSE
VOLTAGE, (%)
0.01
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
FORWARD VOLTAGE, VOLTS
Page 2 of 2
Rev. 02 : March 24, 2005
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