Siemens BFQ 81 Data Sheet
Summary
This high-performance NPN Silicon RF Transistor is engineered for mission-critical telecommunications applications, excelling in low-noise amplifiers (LNA) and broadband analog/digital circuitry up to 2GHz. This comprehensive technical manual provides detailed operational specifications including maximum ratings, AC/DC characteristics across varying frequencies, power gain details, and ready-to-use SPICE models. It is essential for electrical engineers and circuit designers developing complex high-frequency electronic systems requiring reliable signal amplification and robust performance in demanding environments.
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BFQ 81
NPN Silicon RF Transistor
• For low-noise amplifiers up to 2GHz and broadband analog and digital applications in telecommunications systems at collector currents from 0.5 m A to 20 m A.
ESD: Electrostatic discharge sensitive device, observe handling precaution! Type Marking Ordering Code Pin Configuration Package BFQ 81 RAs Q62702-F1049 1 = B 2 = E 3 = C SOT-23
Maximum Ratings Parameter Symbol Values Unit Collector-emitter voltage VCEO Collector-emitter voltage VCES Collector-base voltage VCBO Emitter-base voltage VEBO Collector current IC m A Base current IB Total power dissipation Ptot m W TS ≤ 59 °C Junction temperature Tj °C Ambient temperature TA - 65 ... + 150 Storage temperature Tstg - 65 ... + 150 Thermal Resistance
Junction - soldering point 1) Rth JS ≤ 325 K/W
1) TS is measured on the collector lead at the soldering point to the pcb.
Semiconductor Group Dec-12-1996
Page Summary Contents For Siemens BFQ 81 Data Sheet
Manual Details
| Brand | Siemens |
|---|---|
| Pages | 7 |
| File Size | 59.44 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
Is this transistor sensitive to electrostatic discharge?
Yes, it is an ESD sensitive device; observing handling precautions is required.
What is the maximum permissible collector-emitter voltage ($V_{CEO}$)?
The maximum rated collector-emitter voltage is 16 V.
What is the typical Noise Figure (NF) for this component?
The characteristic noise figure reported is 0.80846 dB.
What range of frequency does it maintain good power gain across?
Power gain figures are provided at standard frequencies like 900 MHz and up to 2.5 GHz depending on the parameter used.