SMP4341TR

Overview

The SMP4341TR is an N-channel JFET utilizing InterFET N0016H geometry, housed in a SOT-23 surface-mount package. It features a gate-to-source breakdown voltage of -50V and a typical input capacitance (CISS) of 3pF. The device exhibits low gate leakage (<1pA typical at 40V), a typical noise figure of 3.5 nV/√Hz, and a forward transconductance ranging from 2mS to 4mS. The cutoff voltage typically measures -2.5V, with a drain-to-source saturation current maximum of 9mA.

Feature Summary

• Proprietary N0016H geometry provides exceptionally high radiation tolerance suitable for demanding environments.
• Ultra-low gate leakage characteristics ensure minimal signal degradation in sensitive amplifier stages.
• Low input capacitance supports high-frequency performance and fast switching applications.

Applications

• Radar systems and satellite communications
• Hydrophone preamplifiers and medical imaging equipment
• Precision oscillators and signal mixers

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging containing up to 3,000 pieces on a 7-inch reel or up to 9,000 pieces on a 13-inch reel. Confirm compliance with RoHS, REACH, and CMR standards. Ensure the ordering part number matches the required binning options for gain or cutoff voltage specifications.

Selection Notes

Select this component for mid-frequency designs requiring low leakage and high radiation hardness. Compare against industry standard crosses like 2SK40 or 2N4868A if legacy compatibility is needed. Consider the IFNU series for dual configurations or other InterFET parts for different voltage ratings.

Part Context

This device belongs to the 2N4340/2N4341 family of very low leakage mid-gain JFETs. While the 2N4340 offers lower saturation current, the 2N4341 variant provides higher current capabilities. Both share identical electrical profiles regarding breakdown voltages and leakage characteristics.

Replacement Considerations

Public confirmed substitutes include 2SK40, 2SK105, SST202, 2N4868A, 2N4869A, 2N4221A, J231, J202, and VCR4N.

FAQ

Are the source and drain pins interchangeable?

Yes, the datasheet notes that source and drain pins are interchangeable for both SOT-23 and TO-18 packages.

What is the typical noise figure specification?

The typical noise figure is 3.5 nV/√Hz at 1kHz with a 1 MΩ gate resistance and 200 Hz bandwidth.

Does the device support through-hole mounting?

While the SMP4341TR is a surface-mount part, the 2N4341 family is available in through-hole TO-18 and TO-92 packages.