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

.

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

Symbol

Parameter

Value

Un it

Collector-Base Voltage

110

V

Collector-Emitter Voltage

55

V

Emitter-Base Voltage

4.0

V

Device Current

20

A

≤ 25°C)

257

W

Junction Temperature

+200

°C

Storage Temperature

− 65 to +150

°C

Junction-Case Thermal Resistance

0.48

°C/W

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