2N5461_L99Z

Overview

The onsemi 2N5461_L99Z is a small signal field-effect transistor featuring a single P-channel silicon junction FET structure. It utilizes a TO-92 cylindrical package with three through-hole pins, designed for low-level audio and general-purpose applications involving high impedance signal sources. The device operates in depletion mode with a maximum drain-gate voltage of -40 V and a gate-source voltage rating of 40 V. It supports a forward gate current of 10 mA and functions within a temperature range of -55 °C to +150 °C. Key electrical characteristics include a maximum feedback capacitance (Crss) of 2 pF.

Feature Summary

• Designed primarily for low level audio and general purpose applications with high impedance signal sources
• Utilizes a P-channel silicon junction FET technology configured as a single element
• Features interchangeable source and drain terminals for flexible circuit integration

Applications

• Low level audio amplification circuits
• General purpose switching applications requiring high input impedance
• Signal processing stages interfacing with high impedance sources

Procurement Notes

Verify the specific manufacturer origin associated with the L99Z suffix, as historical data links this part number to Fairchild Semiconductor or its successors. Confirm that the component meets required RoHS compliance standards if applicable to the target assembly. Ensure the TO-92 through-hole package aligns with existing PCB footprint designs. Validate that the depletion mode operation matches the intended circuit biasing requirements before finalizing procurement.

Selection Notes

Select this component when a P-channel JFET with high input impedance is required for audio or general signal paths. The TO-92 package suits prototyping and low-volume manual assembly. Consider the -40 V drain-gate voltage limit for appropriate headroom in the application circuit. Verify thermal management capabilities given the 150 °C maximum junction temperature rating for high-temperature environments.

Part Context

This component belongs to the 2N546x series of P-channel JFETs, which includes variants like the 2N5460 and 2N5462. These devices are commonly used in analog signal processing due to their high input impedance and low noise characteristics. The series is historically significant in audio equipment design and general-purpose amplifier circuits where minimal loading of high-impedance sources is critical.

Replacement Considerations

Direct substitutes include the 2N5460 and 2N5462 from compatible manufacturers. MMBF5460 and MMBF5462 offer surface-mount alternatives in SOT-23 packages with identical electrical characteristics. Verify pinout compatibility and package dimensions when transitioning between through-hole and surface-mount versions.