FR251 - FR257-STR
PRV : 50 - 1000 Volts
Io : 2.5 Amperes
FEATURES :
*
*
*
*
*
*
High current capability
High surge current capability
High reliability
Low reverse current
Low forward voltage drop
Fast switching for high efficiency
FAST RECOVERY
RECTIFIER DIODES
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
0.040 (1.02)
0.0385 (0.98)
1.00 (25.4)
MIN.
Dimensions in inches and ( millimeters )
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%.
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
Ta = 55
°C
Peak Forward Surge Current,
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
SYMBOL FR251 FR252 FR253 FR254 FR255 FR256 FR257
FR257
-STR
UNIT
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
I
FSM
V
F
I
R
I
R(H)
Trr
100
1.3
10
500
150
28
- 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. 01 : January 10, 2004
RATING AND CHARACTERISTIC CURVES ( FR251 - FR257 )
FIG.1 - REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM
50
Ω
10
Ω
+ 0.5 A
D.U.T.
50 Vdc
(approx)
1
Ω
PULSE
GENERATOR
( NOTE 2 )
OSCILLOSCOPE
( NOTE 1 )
0
- 0.25 A
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
AVERAGE FORWARD OUTPUT
CURRENT, AMPERES
2.5
100
FIG.3 - MAXIMUM NON-REPETITIVE PEAK
FORWARD SURGE CURRENT
PEAK FORWARD SURGE
CURRENT, AMPERES
8.3 m s S INGLE HALF SINE W A V E
Ta = 50
°C
80
2.0
1.5
60
1.0
40
0.5
60Hz RESISTIVE OR INDUCTIVE LOAD
0
25
50
75
100
125
150
175
20
0
0
1
2
4
6
10
20
40
60
100
AMBIENT TEMPERATURE, (
°
C)
FIG.4 - TYPICAL FORWARD CHARACTERISTICS
NUMBER OF CYCLES AT 60Hz
FIG.5 - TYPICAL REVERSE CHARACTERISTICS
100
10
Pulse W idth = 300
µs
2% Duty Cycle
T
J
= 25
°C
T
J
= 100
°C
FORWARD CURRENT, AMPERES
REVERSE CURRENT,
MICROAMPERES
10
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. 01 : January 10, 2004
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