SMP5461

Overview

The InterFET SMP5461 is a P-Channel Junction Field Effect Transistor (JFET) designed for sensitive amplifier stages in mid-frequency applications. It utilizes InterFET's proprietary P0032F geometry to achieve low input capacitance and typical noise performance. The device operates with a gate-to-source breakdown voltage of 40V and features a drain-to-source saturation current range of -1mA to -9mA. Forward transconductance typically ranges from 1500μS to 5000μS, while the gate-to-source cutoff voltage spans 1V to 7.5V.

Feature Summary

• Utilizes InterFET P0032F geometry for optimized performance
• Provides low input capacitance suitable for high-frequency sensitivity
• Offers low equivalent circuit input noise voltage
• Available in surface mount SOT23 package configurations

Applications

• Audio Amplifiers
• General Purpose Amplifiers
• Sensitive Mid-Frequency Amplifier Stages

Procurement Notes

Verify the specific ordering suffix to confirm packaging type, as bulk, tape and reel, and waffle pack options exist. Confirm RoHS compliance status for the specific batch. Ensure the selected variant matches the required pinout orientation for the target PCB layout. Validate that the thermal derating requirements are met for the intended operating temperature range.

Selection Notes

Select the SMP5461 when low input capacitance and low noise are critical for mid-frequency signal integrity. Compare the forward transconductance and cutoff voltage ranges against circuit biasing requirements. Consider the SOT23 package for space-constrained surface mount designs. Evaluate the 40V breakdown rating against maximum circuit voltages to ensure adequate safety margins.

Part Context

The SMP5461 belongs to the 2N5460-1-2 series of P-Channel JFETs manufactured by InterFET. This family includes variants like the SMP5460 and SMP5462, which share similar geometries but differ in gain and current specifications. The SMP5461 serves as a middle-ground option within this lineup, balancing transconductance and saturation current characteristics for general-purpose amplification tasks.

Replacement Considerations

Direct substitutes include the SMP5460 and SMP5462 from the same manufacturer, though their electrical parameters such as IDSS and GFS differ. Cross-brand replacements require verification of matching pinouts, voltage ratings, and package dimensions to ensure compatibility without circuit redesign.

FAQ

What is the typical input capacitance of the SMP5461?

The typical input capacitance (Ciss) is 3.2pF.

What is the maximum continuous power dissipation?

The maximum continuous device power dissipation is 300mW at 25°C ambient temperature.

Does the SMP5461 support surface mount technology?

Yes, the SMP5461 is available in the SOT23 surface mount package.