BF245A_D27Z

Overview

The BF245A_D27Z is an N-channel depletion-mode Junction Field-Effect Transistor (JFET) manufactured by onsemi. Designed for VHF and UHF amplifier applications, this component utilizes silicon technology within a TO-92-3 (TO-226AA) through-hole package. Key electrical ratings include a drain-source voltage of ±30 V, a drain-gate voltage of 30 V, and a gate-source voltage of 30 V. The device supports a maximum continuous drain current of 100 mA and a forward gate current of 10 mA. Total device dissipation is rated at 350 mW at 25°C ambient temperature, with a derating factor of 2.8 mW/°C above this threshold. The operating storage channel temperature range spans from -65°C to +150°C.

Feature Summary

• Optimized for radio frequency amplification in VHF and UHF bands
• N-channel depletion mode operation suitable for low-noise signal processing
• Robust thermal performance with high junction temperature capability

Applications

• VHF/UHF RF amplifier stages
• Low-noise front-end circuits
• Impedance matching networks

Procurement Notes

Verify the specific suffix _D27Z against official onsemi documentation to confirm packaging details, as standard BF245A variants may utilize different bulk or tape configurations. Confirm RoHS compliance status directly with the manufacturer, as historical data indicates potential non-compliance for certain legacy versions. Ensure the obsolete part status is accounted for in long-term supply chain planning.

Selection Notes

Select this component when designing circuits requiring N-channel JFETs for VHF/UHF frequencies. Verify that the 30 V breakdown voltage and 100 mA current limits align with the system's power requirements. Consider the TO-92-3 package constraints for PCB layout and thermal management during the initial design phase.

Part Context

This part belongs to the BF245 family of N-channel depletion JFETs, which also includes variants such as BF245B and BF245C. These components are historically significant in analog RF design. The BF245A variant specifically targets general-purpose VHF/UHF amplification needs within the broader discrete semiconductor product line offered by onsemi.

Replacement Considerations

Potential substitutes include the BF245B and BF245C variants within the same family, offering similar electrical characteristics with potentially different gain groupings. Cross-reference with other manufacturers' equivalents like the 2N5484 or J308 if pin-compatible alternatives are required.