SD1731-14 (ST448)
RF & MICROWAVE TRANSISTORS
HF SSB APPLICATIONS
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PRELIMINARY DATA
OPTIMIZED FOR SSB
30 MHz
50 VOLTS
EFFICIENCY 40%
COMMON EMITTER
GOLD METALLIZATION
P
OUT
=
250 W PEP WITH 12 dB GAIN
.50 0 4LF L (M17 4 )
epoxy sealed
O R DE R CODE
SD1731-14
BRANDING
ST448
PIN CONNECTION
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.
ABSOLUTE MAXIMUM RATINGS
(T
case
=
25
擄
C)
Symbol
Parameter
Value
Un it
1. Collector
2. Emitter
3. Base
4. Emitter
V
CBO
V
CEO
V
EBO
I
C
P
DISS
T
J
T
STG
Collector-Base Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Device Current
Power Dissipation (T
heatsink
鈮?/div>
25擄C)
Junction Temperature
Storage Temperature
110
55
4.0
20
257
+200
鈭?/div>
65 to +150
V
V
V
A
W
擄
C
擄
C
THERMAL DATA
R
TH(j-c)
R
TH(c-s)
S e pte m be r 6, 1 99 6
Junction-Case Thermal Resistance
Case-Heatsink Thermal Resistance
0.48
0.2
擄
C/W
擄
C/W
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