Notes:

(1) Reverse recovery test conditions: I

(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

I

(AV)

2.5

Amps

Peak forward surge current, I

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

@ rated reverse voltage

T

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

-55 to +150

Features

Mechanical Data

FR251G THRU FR257G

GLASS PASSIVATED JUNCTION FAST SWITCHING RECTIFIER

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

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

-