BY251 THRU BY255

GENERAL PURPOSE SILICON RECTIFIER

Reverse Voltage - 200 to 1300 Volts

Forward Current - 3.0 Ampere

Case: JEDEC DO-201AD molded plastic body

Terminals: Plated axial leads, solderable per MIL-STD-750,

Method 2026

Polarity: Color band denotes cathode end

Mounting Position: Any

Weight:0.04 ounce, 1.10 grams

The plastic package carries Underwriters Laboratory

Flammability Classification 94V-0

Construction utilizes void-free

molded plastic technique

Low reverse leakage

High forward surge current capability

High temperature soldering guaranteed:

5 lbs. (2.3kg) tension

FEATURES

MECHANICAL DATA

MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS

VOLTS

VOLTS

VOLTS

SYMBOLS

UNITS

Amps

Amps

Volts

3.0

150

1.1

Operating junction and storage temperature range

Maximum repetitive peak reverse voltage

Maximum RMS voltage

Maximum DC blocking voltage

Maximum average forward rectified current

0.375

Peak forward surge current

8.3ms single half sine-wave superimposed on

rated load (JEDEC Method)

Maximum instantaneous forward voltage at 3.0A

Maximum DC reverse current

at rated DC blocking voltage

Typical junction capacitance (NOTE 1)

Note:1.Measured at 1MHz and applied reverse voltage of 4.0V D.C.

2.Thermal resistance from junction to ambient at 0.375

”(9.5mm)lead length,P.C.B. mounted

10.0

500

20.0

30.0

-65 to +175

pF

C

A

u

Typical thermal resistance (NOTE 2)

C/W

200

140

200

BY251

400

280

400

BY252

600

420

600

BY253

800

560

800

BY254

1300

910

1300

BY255

Ratings at 25 C ambient temperature unless otherwise specified.

Single phase half-wave 60Hz,resistive or inductive load,for capacitive load current derate by 20%.

DO-201AD

0.220 (5.6)

0.197(5.0)

DIA.

0.052 (1.3)

0.048 (1.2)

DIA.

0.375(9.5)

0.285(7.2)

Dimensions in inches and (millimeters)

1.0 (25.4)

MIN.

1.0 (25.4)

MIN.

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