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Product Detailed Parameters
- Description：RF MOSFET JFET 30V TO92
- Series：-
- Mfr：onsemi
- Package：Bulk
- Technology：JFET
- Frequency：800MHz
- Gain：11dB
- Voltage - Test：-
- Current Rating (Amps)：7mA
- Noise Figure：-
- Current - Test：-
- Power - Output：-
- Voltage - Rated：30 V
- Grade：-
- Qualification：-
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 Long Body
- Supplier Device Package：TO-92 (TO-226)
- Configuration：N-Channel
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Overview
The onsemi BF256AG is an N-channel Junction Field-Effect Transistor (JFET) designed for radio frequency applications. It operates with a maximum drain-source voltage of 30V and supports a continuous drain current of 18mA. The device utilizes a TO-92-3 through-hole package, providing a compact form factor suitable for standard mounting configurations. Classified under RF MOSFETs and JFETs, this component functions in depletion mode and is engineered for ultra-high frequency band operations. It is manufactured by onsemi and is identified as a discontinued product within the BF256 series.
Feature Summary
- N-channel JFET configuration optimized for RF signal processing
- Ultra-high frequency band operation capability
- Through-hole TO-92-3 package for standard board mounting
Applications
- Radio frequency amplification circuits
- High-frequency oscillator stages
- RF mixer and detector applications
Procurement Notes
This component is officially listed as obsolete and no longer manufactured by onsemi. Verification should focus on identifying qualified replacement parts rather than sourcing new units. Buyers must confirm that substitute components meet the original electrical specifications, particularly regarding RF performance and pin compatibility. Availability is restricted to existing stock or secondary market suppliers.
Selection Notes
Designers requiring this specific part number must evaluate alternative devices due to its discontinued status. Selection criteria should prioritize matching the 30V breakdown voltage, 18mA current rating, and TO-92-3 package dimensions. Verify that any replacement JFET maintains similar transconductance and capacitance characteristics to ensure circuit stability in high-frequency environments without redesigning the PCB footprint.
Part Context
The BF256AG belongs to the BF256 family of N-channel JFETs produced by onsemi. This series includes variants such as the BF256A, BF256B, and BF256C, which share similar structural designs but may differ in specific gain or capacitance parameters. These transistors are historically utilized in analog RF front-end modules where low-noise performance and high-frequency response are critical requirements.
Replacement Considerations
The MMBF5485 from onsemi is documented as a similar available alternative. Engineers should verify pinout compatibility and electrical parameter alignment before substitution.
