SMP4392TR

Overview

The SMP4392TR is an N-channel JFET utilizing InterFET N0132S geometry, packaged in SOT-23 on a 7-inch or 13-inch tape and reel. It features a gate-to-source breakdown voltage of -40V and a drain-to-source saturation current (IDSS) ranging from 25mA to 75mA at VGS=0V. The device exhibits a gate-to-source cutoff voltage between -2V and -5V. Static on-resistance is specified between 30Ω and 60Ω at ID=1mA. Dynamic characteristics include an input capacitance of 14pF and turn-on delay times around 15ns.

Feature Summary

• Utilizes InterFET N0132S geometry for low noise performance with typical values of 1.2 nV/√Hz.
• Designed for fast switching applications with minimal gate leakage currents typically below 50pA at room temperature.
• Available in surface mount SOT-23 packaging suitable for automated assembly processes.

Applications

• Low on-resistance analog switches
• Chopper circuits
• Commutator designs

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging configuration as documented in the official ordering information section. Confirm that the minimum order quantity aligns with the manufacturer's standard bulk requirements for this specific reel format. Ensure the component matches the exact InterFET part number designation to guarantee compatibility with intended circuit parameters.

Selection Notes

Select this component when a moderate saturation current between 25mA and 75mA is required alongside a negative cutoff voltage range of -2V to -5V. The SOT-23 package is appropriate for space-constrained surface mount designs. Consider the specific on-resistance limits if precise static switching behavior is critical for the application design.

Part Context

This part belongs to the 2N4391-2-3 series of N-channel JFETs manufactured by InterFET. The SMP4392 variant specifically targets applications requiring higher saturation current compared to the 2N4393 while maintaining similar breakdown voltage characteristics. It serves as a surface-mount alternative to through-hole packages like TO-18 or TO-92 within the same electrical family.

Replacement Considerations

Direct substitutes include SMP4391TR and SMP4393TR from the same InterFET series, though IDSS and VGS(off) ranges differ significantly. Cross-manufacturer equivalents require careful verification of saturation current and cutoff voltage specifications to ensure functional parity in switch and chopper designs.

FAQ

What is the maximum gate-to-source breakdown voltage for the SMP4392TR?

The maximum gate-to-source breakdown voltage (BVGSS) is -40V.

Does the SMP4392TR support hermetically sealed packaging?

No, the SMP4392TR uses a plastic SOT-23 package. Hermetically sealed options are available only in the TO-18 through-hole package variants like the 2N4392.

What is the typical input capacitance of this device?

The input capacitance (Ciss) is typically 14pF when measured at VDS = 20V, VGS = 0V, and f = 1MHz.