RECTRON FR257, FR257P, FR254, FR256, FR255P Datasheet

RECTRON

SEMICONDUCTOR

TECHNICAL SPECIFICA TION

FAST RECOVERY RECTIFIER

VOLTAGE RANGE 50 to 1000 Volts CURRENT 2.5 Amperes

FEATURES

* Fast switching
* Low leakage
* Low forward voltage drop
* High current capability
* High current surge
* High reliability

MECHANICAL DATA

* Case: Molded plastic
* Epoxy: Device has UL flammability classification 94V-O
* Lead: MIL-STD-202E method 208C guaranteed
* Mounting position: Any
* Weight: 0.54 gram

MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS

Ratings at 25 oC ambient temperature unless otherwise specified.
Single phase, half wave, 60 Hz, resistive or inductive load.
For capacitive load, derate current by 20%.

.160 (4.1
.138 (3.5

1.0 (25.4
MIN.

)
)

1.0 (25.4
MIN.

FR251

THRU

FR257

.042 (1.1
.040 (1.0

)

.160 (4.1
.138 (3.5

)

R-3

)

DIA.

)

)

DIA.

)

Dimensions in inches and (millimeters)

MAXIMUM RATINGS

Maximum Recurrent Peak Reverse Voltage
Maximum RMS Voltage
Maximum DC Blocking Voltage
Maximum Average Forward Rectified Current

at TA= 75oC
Peak Forward Surge Current 8.3 ms single half sine-wave

superimposed on rated load (JEDEC method)
Typical Junction Capacitance (Note 2)
Operating and Storage Temperature Range

ELECTRICAL CHARACTERISTICS

Maximum Instantaneous Forward Voltage at 2.5A DC Volts
Maximum DC Reverse Current

at Rated DC Blocking Voltage TA = 25oC
Maximum Full Load Reverse Current Average,

Full Cycle .375” (9.5mm) lead length at TL = 55oC
Maximum Reverse Recovery Time (Note 1)

NOTES : 1. Test Conditions: IF = 0.5A, IR = -1.0A, IRR = -0.25A

2. Measured at 1 MHZ and applied reverse voltage of 4.0 volts

(At TA = 25oC unless otherwise noted)

RATINGS

(At TA = 25oC unless otherwise noted)

CHARACTERISTICS

SYMBOL

V

RRM

V

RMS

V

DC

I

O

I

FSM

C

J

TJ, T

STG

SYMBOL

V

F

I

R

trr

50

100 200
35
50

100 200

FR251 FR252 FR253 FR254 FR255 FR255P FR256 FR257 FR257P

150

400

600

14070

280
400

-65 to + 150

600 800

420

420

600 600

150

60

1.3

5.0

100

250 500

150 250

560
800

1000

700

1000

1000

700

1000

UNITSFR251 FR252 FR253 FR254 FR255 FR255P FR256 FR257 FR257P

Volts
Volts
Volts

Amps2.5

Amps

pF

0

C

UNITS

uAmps

uAmps

nSec

2001-5

RATING AND CHARACTERISTIC CURVES

(

FR251 THRU FR257

)

FIG. 1 - TYPICAL FORWARD CURRENT

DERATING CURVE

2.5

2.0

1.5

1.0

Single Phase
Half Wave 60Hz

.5

Resistive or
Inductive Load

AVERAGE FORWARD CURRENT, (A)

0

0 25 50 75 100 125 150 175

AMBIENT TEMPERATURE, ( )

FIG. 3 - TYPICAL INSTANTANEOUS

FORWARD CHARACTERISTICS

20
10

3.0

1.0

0.3

TJ = 25
Pulse Width=300uS
1% Duty Cycle

0.1

.03
.01

INSTANTANEOUS FORWARD CURRENT, (A)

0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8

INSTANTANEOUS FORWARD VOLTAGE, (V)

FIG. 3 - MAXIMUM NON-REPETITIVE FORWARD

SURGE CURRENT

150

125
100

8.3ms Single Half Sine-Wave
(JEDEC Method)

75
50

CURRENT, (A)

25

PEAK FORWARD SURGE

0

1 2 5 10 20 50 100

NUMBER OF CYCLES AT 60Hz

FIG. 4 - TYPICAL JUNCTION CAPACITANCE
200
100

60
40

20
10

6

TJ = 25

4
2

JUNCTION CAPACITANCE, (pF)

1

.1 .2 .4 1.0 2 4 10 20 40 100

REVERSE VOLTAGE, ( V )

FIG. 5 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC

50
NONINDUCTIVE10NONINDUCTIVE

( + )

25 Vdc
(approx)

( - )

NOTES:

D.U.T

1
NON­INDUCTIVE

1 Rise Time = 7ns max. Input Impedance =
1 megohm. 22pF.

2. Rise Time = 10ns max. Source Impedance =
50 ohms.

OSCILLOSCOPE

(NOTE 1)

( - )

PULSE

GENERATOR

(NOTE 2)

( + )

+0.5A

-0.25A

-1.0A

trr

0

1cm

SET TIME BASE FOR
50/100 ns/cm

RECTRON