AVIONICS APPLICATIONS

RF & MICROWAVE TRANSISTORS

. 400 SQ. 2LFL (M103)

epoxy sealed

DESCRIPTION

The SD1540 is a gold metallized silicon, NPN

power transistor designed for applications requiring

high peak power and low duty cycles such as

IFF, DME and TACAN. The SD1540 is packaged

in a metal/ceramic package with internal input/out-

put matching resulting in improved broadband per-

formance and a low thermal resistance.

PIN CONNECTION

BRANDING

SD1540

ORDER CODE

SD1540

= 25°C)

Symbol

Parameter

Value

Uni t

Collector-Base Voltage

65

V

Collector-Emitter Voltage

65

V

Emitter-Base Voltage

3.5

V

Device Current

22

A

Power Dissipation

875

W

Junction Temperature

+200

°C

Storage Temperature

− 65 to +150

°C

Junction-Case Thermal Resistance

0.20

°C/W

SD1540

1. Collector

3. Emitter

2. Base

4. Base

THERMAL DATA

November 1992

.

DESIGNED FOR HIGH POWER PULSED

IFF, DME, TACAN APPLICATIONS

.

350 WATTS (typ.) IFF 1030 - 1090 MHz

.

300 WATTS (min.) DME 1025 - 1150 MHz

.

2900 WATTS (typ.) TACAN 960 - 1215 MHz

.

6.3 dB MIN. GAIN

.

REFRACTORY GOLD METALLIZATION

.

EMITTER BALLASTING AND LOW

THERMAL RESISTANCE FOR

RELIABILITY AND RUGGEDNESS

.

30:1 LOAD VSWR CAPABILITY AT

SPECIFIED OPERATING CONDITIONS

.

INPUT/OUTPUT MATCHED, COMMON

BASE CONFIGURATION

1/5