U430-E3

Overview

The U430-E3 is a dual N-channel JFET pair manufactured by Vishay Siliconix. It features matched characteristics for both transistors within a single TO-78 metal can package. The device supports a drain-source voltage of 25 V and dissipates up to 500 mW of power. Designed for high-frequency applications, it maintains good power gain at frequencies exceeding 250 MHz. The input capacitance is specified at 5 pF when measured at 10 V. This component serves as a reliable solution for precision analog circuits requiring matched dual junction field-effect transistors.

Feature Summary

• Dual N-channel configuration with matched electrical parameters
• High-frequency operation capability beyond 250 MHz
• Robust TO-78 metal can packaging for thermal stability

Applications

• RF amplifier stages
• Precision analog signal processing
• High-frequency oscillator circuits

Procurement Notes

Verify the specific suffix E3 confirms lead-free compliance and RoHS status against current manufacturer documentation. Confirm the physical package integrity of the TO-78 metal can upon receipt. Ensure storage conditions maintain component reliability given the sensitive nature of matched JFET pairs. Cross-reference the datasheet revision date to ensure compatibility with modern design requirements.

Selection Notes

Select this component when matched dual JFET performance is critical for circuit symmetry. The TO-78 package offers distinct advantages for high-power dissipation relative to smaller surface-mount options. Consider the 25 V voltage limit and 500 mW power rating during thermal design. Verify that the 5 pF input capacitance meets the bandwidth requirements of the target application.

Part Context

The U430 belongs to Vishay's lineup of matched JFET pairs designed for specialized analog applications. Unlike standard discrete transistors, these devices are screened and paired to minimize parameter variation between channels. The TO-78 package provides superior heat dissipation compared to plastic packages, supporting higher power handling in compact footprints.

Replacement Considerations

Check for direct equivalents such as the U431 variant if P-channel functionality is required instead. Verify pinout compatibility before substituting with other TO-78 dual JFETs from different manufacturers.