ST448 datasheet(1/5 Pages) STMICROELECTRONICS

Teilenummer	ST448

Bauteilbeschribung	RF & MICROWAVE TRANSISTORS HF SSB APPLICATIONS

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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PRELIMINARY DATA

RF & MICROWAVE TRANSISTORS

HF SSB APPLICATIONS

.500 4LFL (M174)

epoxy sealed

.

OPTIMIZED FOR SSB

.

30 MHz

.

50 VOLTS

.

EFFICIENCY 40%

.

COMMON EMITTER

.

GOLD METALLIZATION

.

POUT

= 250 W PEP WITH 12 dB GAIN

DESCRIPTION

The SD1731 is a 50 V epitaxial silicon NPN planar

transistor designed primarily for SSB communica-

tions. This device utilizes emitter ballasting for im-

proved ruggedness and reliability.

PIN CONNECTION

BRANDING

ST448

O R DE R CODE

SD1731-14

ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C)

Symbol

Parameter

Value

Un it

VCBO

Collector-Base Voltage

110

V

VCEO

Collector-Emitter Voltage

55

V

VEBO

Emitter-Base Voltage

4.0

V

IC

Device Current

20

A

PDISS

Power Dissipation (Theatsink

≤ 25°C)

257

W

TJ

Junction Temperature

+200

°C

TSTG

Storage Temperature

− 65 to +150

°C

RTH(j-c)

Junction-Case Thermal Resistance

0.48

°C/W

RTH(c-s)

Case-Heatsink Thermal Resistance

0.2

°C/W

SD1731-14 (ST448)

1. Collector

3. Base

2. Emitter

4. Emitter

THERMAL DATA

S e pte m be r 6, 1 99 6

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