U440-E3

Overview

The U440-E3 is a monolithic dual N-channel JFET pair manufactured by Vishay Siliconix. It integrates two independent, tightly matched transistors within a single TO-71-6 package to reduce board space compared to discrete devices. The component operates with a maximum drain-source voltage of 25 V and supports a continuous power dissipation of 500 mW. Designed for through-hole mounting, it features lead-free construction compliant with RoHS standards.

Feature Summary

• Integrates two independent N-channel JFETs in a single package
• Provides tightly matched transistor characteristics for precision applications
• Reduces printed circuit board area requirements versus discrete components

Applications

• Precision analog signal processing circuits
• Low-noise amplifier input stages
• Balanced differential amplifier configurations

Procurement Notes

Verify current availability status as the component may be subject to obsolescence or limited supply conditions. Confirm that the TO-71-6 package dimensions align with existing PCB footprints. Ensure thermal management strategies accommodate the specified power dissipation limits during operation.

Selection Notes

Select this component when matched electrical characteristics between two JFETs are required for circuit symmetry. Consider the physical size constraints of the TO-71-6 package against available board real estate. Evaluate whether the 25 V voltage rating meets the specific operational requirements of the target application environment.

Part Context

This device belongs to the Vishay Siliconix lineup of matched JFET pairs. It serves as a direct replacement for legacy siliconix products such as the 2N5564. The U440 series provides a compact solution for applications requiring high-quality matched transistor pairs without the complexity of sourcing individual discrete components.

Replacement Considerations

• 2N5564
• U430