Vishay BF961 Data Handbook & Specifications
Summary
The BF961 is a high-performance N-Channel Dual Gate MOSFET designed for critical RF receiving applications, including FM/VHF TV-tuners up to 300 MHz. This comprehensive technical manual provides electrical data necessary for circuit design, covering key parameters like transadmittance, input capacitance, and power dissipation under various operating conditions. It is essential reference material for electronics engineers and designers developing sensitive analog circuits that require exceptional low noise figures and robust signal handling.
Page 1 Text Content
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BF961
Vishay Semiconductors
N-Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode
Features Integrated gate protection diodes High cross modulation performance Low noise figure High AGC-range G2 Low feedback capacitance G1 Low input capacitance
Applications Electrostatic sensitive device. Observe precautions for handling.
Input- and mixer stages especially for FM- and VHF TV-tuners up to 300 MHz.
Mechanical Data Case: TO-50 Plastic case Weight: approx. 124 mg Marking: BF961 Pinning: 1 = Drain, 2 = Source, 3 = Gate 1, 4 = Gate 2
Parts Table
Part Ordering Ccode Marking Package
BF961 BF961A or BF961B BF961 TO50 BF961A BF961A BF961 TO50
BF961B BF961B BF961 TO50
Absolute Maximum Ratings Tamb = 25 °C, unless otherwise specified
Parameter Test condition Symbol Value Unit
Drain - source voltage VDS Drain current ID m A Gate 1/Gate 2 - source peak ± IG1/G2SM m A current Total power dissipation Tamb ≤ 60 °C Ptot m W Channel temperature TCh °C Storage temperature range Tstg - 55 to + 150 °C
Maximum Thermal Resistance Parameter Test condition Symbol Value Unit
Channel ambient 1) Rth Ch A K/W
1) on glass fibre printed board (40 x 25 x 1.5) mm3 plated with 35 µm Cu
Document Number 85002 www.vishay.com Rev. 1.5, 25-Nov-04
Page Summary Contents For Vishay BF961 Data Handbook & Specifications
Manual Details
| Brand | Vishay |
|---|---|
| Pages | 7 |
| File Size | 156.46 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What types of tuning tuners are suitable for this component?
It is designed for input- and mixer stages, especially for FM- and VHF TV-tuners up to 300 MHz.
How can I identify the function of each pin?
Pin 1 is Drain, Pin 2 is Source, Pin 3 is Gate 1, and Pin 4 is Gate 2.
What precautions must be taken when handling it?
It is an electrostatic sensitive device, so users must observe specific precautions during handling.
Are the operating parameters standardized for all uses?
No; all operating parameters must be validated by the customer for their specific application.