4391 DFN 8L ROHS

Jfets Overview

The 4391 DFN 8L ROHS is an N-channel Junction Field-Effect Transistor (JFET) manufactured by Linear Integrated Systems, Inc. It features a maximum drain-source voltage rating of 40 V and a power dissipation capacity of 300 mW. The device is designed for surface-mount applications, utilizing an 8-lead DFN package with dimensions of 2x2 mm. This component belongs to the PN/SST4391 series, which offers advanced screening options and operates within a temperature range of -55°C to 150°C.

Jfets Feature Summary

• N-channel JFET configuration optimized for low-noise analog signal processing
• Surface-mount construction in a compact 8-DFN (2x2 mm) package
• Extended operating temperature range from -55°C to 150°C
• Advanced screening options available for high-reliability requirements

Jfets Applications

• Low-noise preamplifier input stages
• High-impedance sensor interface circuits
• Precision analog switch applications
• Charge-sensitive amplifier inputs

Jfets Procurement Notes

Verify that the ordered part number includes the 'ROHS' suffix to ensure compliance with environmental standards. Confirm the specific package variant matches the 8-DFN (2x2) footprint required for your PCB layout. Check for any advanced screening requirements if the application demands higher reliability than standard commercial grade. Ensure compatibility with the -55°C to 150°C operating temperature range specified for this series.

Jfets Selection Notes

Select this component when a surface-mount N-channel JFET with a 40V breakdown voltage is required. The 8-DFN package is suitable for space-constrained designs needing robust thermal performance up to 300 mW. Consider the PN/SST4391 series alternatives if through-hole or different pinout configurations are necessary. Verify that the gate-source leakage characteristics meet the specific noise and impedance requirements of the target circuit design.

Jfets Part Context

This part is a member of the PN/SST4391 series from Linear Integrated Systems, Inc., which provides various JFET options including TO-92, TO-18, SOT-23, and bare die packages. The brand specializes in low-noise discrete transistors and mixed-signal ICs, often serving medical imaging, precision instrumentation, and scientific data acquisition markets. The 4391 specifically addresses the need for reliable surface-mount JFETs in modern electronic assemblies.

Jfets Replacement Considerations

Direct substitutes include other parts within the PN/SST4391 series such as PN4391 or SST4391, provided the package type matches the required form factor. Cross-reference electrical parameters like Vgs(off) and Idss with the specific datasheet sheet for the chosen package variant to ensure functional equivalence in the target circuit.