SMP5462

Overview

The InterFET SMP5462 is a P-Channel Junction Field-Effect Transistor (JFET) designed for sensitive amplifier stages in mid-frequency applications. It utilizes the InterFET P0032F geometry to achieve low input capacitance and low noise characteristics. The device features a typical forward transconductance of 3.5 mS, making it suitable for higher gain requirements. Key electrical parameters include a gate-to-source breakdown voltage of 40 V, a drain-to-source saturation current range of -4 mA to -16 mA, and a gate-to-source cutoff voltage between 1.8 V and 9 V. It is available in surface-mount SOT23 packaging.

Feature Summary

• Utilizes InterFET P0032F geometry for optimized performance
• Provides low input capacitance for high-frequency signal integrity
• Delivers low equivalent input noise voltage for sensitive audio applications
• Offers RoHS compliance and multiple package options including surface mount

Applications

• Audio amplifiers
• General purpose amplifiers
• Sensitive amplifier stages for mid-frequency designs

Procurement Notes

Verify the specific ordering suffix required for your manufacturing process. The SMP5462 designation indicates the surface-mount SOT23 variant. Bulk packaging is available directly from the manufacturer. For automated assembly, confirm availability of tape and reel configurations such as SMP5462TR, which supports 7-inch or 13-inch reels with specified piece counts. Ensure the selected packaging aligns with your board layout and reflow soldering profiles.

Selection Notes

Select the SMP5462 when a P-Channel JFET with higher transconductance is required compared to the 2N5460 or 2N5461 variants. Its typical Gfs of 3.5 mS makes it ideal for circuits demanding higher gain. Consider the SOT23 package for space-constrained surface-mount designs. Verify that the 40V breakdown voltage meets the circuit's maximum operating conditions. The low input capacitance of approximately 3.2 pF supports high-impedance signal sources common in audio preamplifiers.

Part Context

The SMP5462 belongs to the InterFET 2N5460-1-2 family of P-Channel JFETs. This series includes the through-hole 2N5460/5461/5462 and their corresponding surface-mount SMP equivalents. The family shares the same core P0032F geometry but differs in binning for transconductance and saturation current. The SMP5462 specifically targets applications requiring the highest gain within this general-purpose lineup while maintaining low noise and capacitance specifications.

Replacement Considerations

Direct functional replacements within the same family include the 2N5462 (through-hole) and SMP5462 (surface mount). Cross-package substitution requires verifying pinout compatibility between SOT23 and TO-92 if mechanical constraints allow. Other P-Channel JFETs may serve as alternatives only if their transconductance, breakdown voltage, and noise figures meet the specific design requirements without altering the circuit topology.