BF245A_D75Z

Overview

The BF245A_D75Z is an N-channel silicon small-signal Junction Field-Effect Transistor (JFET) manufactured by onsemi. Designed for VHF and UHF applications, it operates in depletion mode within a TO-92-3 (TO-226AA) through-hole package. Key electrical ratings include a drain-source voltage of ±30 Vdc, a drain current of 100 mAdc, and a forward gate current of 10 mAdc. The device supports a total power dissipation of 350 mW at 25°C ambient temperature, with a derating factor of 2.8 mW/°C above this threshold. It functions reliably across a storage channel temperature range of -65°C to +150°C.

Feature Summary

• N-channel JFET technology optimized for VHF/UHF amplifier circuits
• Depletion mode operation suitable for RF signal processing
• Through-hole mounting in a standard TO-92-3 plastic epoxy package

Applications

• VHF band amplification stages
• UHF band small signal processing
• RF mixer and oscillator circuits

Procurement Notes

This component is classified as obsolete and is no longer manufactured by onsemi. Verification of availability requires checking distributor inventories for remaining stock or identifying qualified replacement parts from the same family or alternative manufacturers. Ensure any sourced units match the original datasheet specifications to maintain circuit integrity.

Selection Notes

Select this part for low-noise, high-frequency analog applications requiring N-channel JFET characteristics. Verify that the required drain-source voltage does not exceed 30 V and that the thermal environment allows for proper power dissipation management. Confirm compatibility with existing PCB footprints designed for TO-92-3 packages before integration into new designs.

Part Context

The BF245A_D75Z belongs to the BF245 series of N-channel JFETs, which includes variants such as BF245B and BF245C. These components share similar structural and functional attributes but may differ in specific gain groupings or noise performance metrics. The D75Z suffix typically denotes tape-and-box packaging, distinguishing it from other packaging options like ammo packs or bulk quantities.

Replacement Considerations

Potential substitutes include the BF245B and BF245C from onsemi, which share the same base product number and package type. Other compatible N-channel JFETs in TO-92 packages should be evaluated based on matching voltage ratings, current capabilities, and frequency response characteristics to ensure functional equivalence.