2N4391-E3

Jfets Overview

The Vishay Siliconix 2N4391-E3 is an N-channel silicon Junction Field-Effect Transistor (JFET) belonging to the 2N/PN/SST4391 series. It features a hermetically sealed TO-206AA (TO-18) metal can package with MIL-S-19500 processing. The device operates within a gate-source breakdown voltage of -40 V and a cutoff voltage range of -4 V to -10 V. Key electrical parameters include a maximum drain-source on-resistance of 30 Ω, typical saturation drain current between 50 mA and 150 mA, and negligible gate leakage typically under 5 pA. It supports an operating junction temperature from -55 °C to 200 °C with a power dissipation rating of 1800 mW at 25 °C.

Jfets Feature Summary

• Hermetically sealed metal can construction suitable for demanding environments
• Extremely low gate leakage current ensuring high off-isolation
• Fast switching performance with minimal turn-on delay
• Low input capacitance reducing signal distortion

Jfets Applications

• High-speed analog switches
• Chopper stabilization circuits
• Sample-and-hold amplifiers
• Current limiters
• Commutators

Jfets Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package type and environmental compliance standards. Request original datasheets and material certificates to validate manufacturing origin and traceability before finalizing acquisition.

Jfets Selection Notes

Select this component when designing circuits requiring superior JFET characteristics for precision analog applications. Consider the TO-18 package constraints regarding thermal management and automated assembly limitations compared to surface-mount alternatives in the same series.

Jfets Part Context

This part belongs to the 2N/PN/SST4391 family of N-channel JFETs designed for specialized amplifier and switching roles. While the 2N prefix denotes the through-hole metal can variant, related PN and SST prefixes offer plastic and SMT options respectively. All variants share identical core electrical specifications tailored for low-noise, high-frequency operation.

Jfets Replacement Considerations

Direct functional equivalents within the same series include the PN4391 (plastic TO-92) and SST4391 (SOT-23). Verify pinout compatibility and package dimensions during substitution to ensure mechanical fit without altering circuit layout.

Jfets FAQ

What is the maximum operating junction temperature for the 2N4391?

The maximum operating junction temperature for the 2N prefix version is 200 °C.

How does the gate-source cutoff voltage vary?

The gate-source cutoff voltage (VGS(off)) ranges from -4 V to -10 V depending on the specific binning.

Is the 2N4391 suitable for military applications?

Yes, the 2N series is available with hermetically sealed TO-206AA cans processed per MIL-S-19500 standards.