NPN microwave power transistor
• Input and output matching cell
allows an easier design of circuits
• Diffused emitter ballasting resistors
providing excellent current sharing
and withstanding a high VSWR
• Interdigitated structure provides
high emitter efficiency
• Gold metallization realizes very
stable characteristics and excellent
• Multicell geometry gives good
balance of dissipated power and
low thermal resistance.
QUICK REFERENCE DATA
Microwave performance up to Tmb = 25 °C in a common base class B
Class B (CW)
see Figs 5
PINNING - SOT437A
3 base connected to ﬂange
Common base class B power
amplifiers at 1.6 GHz. Also suitable
for operation in the frequency range
1.4 to 1.8 GHz.
NPN silicon planar epitaxial
microwave power transistor in a
SOT437A glued cap metal ceramic
flange package with base connected
handbook, 4 columns
Fig.1 Simplified outline and symbol.
Product and environmental safety - toxic materials
This product contains beryllium oxide. The product is entirely safe provided that the BeO slab is not damaged.
All persons who handle, use or dispose of this product should be aware of its nature and of the necessary safety
precautions. After use, dispose of as chemical or special waste according to the regulations applying at the location of
the user. It must never be thrown out with the general or domestic waste.
1997 Feb 18