MV2N4857

Overview

The MV2N4857 is a high-reliability N-channel Silicon Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. Designed for military and aerospace applications, it utilizes the JANTXV qualification standard to ensure performance under extreme conditions. The device features a hermetically sealed TO-18 metal can package with three pins, providing robust physical protection. It operates in depletion mode and supports a maximum drain-source voltage of 40 V. The component is rated for a continuous drain current of 360 mA and maintains functionality across an extended temperature range from -65°C to +200°C.

Feature Summary

• Hermetically sealed TO-18 metal can construction ensures environmental durability
• Qualified to JANTXV standards for high reliability in harsh environments
• Supports operation at junction temperatures up to 200°C
• Provides stable N-channel depletion mode switching characteristics

Applications

• Military-grade analog signal processing circuits
• Aerospace control systems requiring high thermal stability
• High-reliability RF amplification stages
• Precision instrumentation within extreme temperature ranges

Procurement Notes

Verify that the specific order explicitly includes the MV prefix, which denotes JANTXV qualification. Standard commercial equivalents lack this rigorous testing and may not meet the required environmental specifications. Confirm the package type matches the TO-18 form factor. Ensure the supplier provides appropriate documentation regarding the radiation hardness and burn-in status associated with the JANTXV level. Cross-reference the manufacturer's latest quality certifications before finalizing procurement.

Selection Notes

Select the MV2N4857 when the application demands strict adherence to JANTXV reliability standards rather than general commercial performance. This part is suitable for designs where the operating environment exceeds standard industrial limits, specifically regarding thermal endurance. Engineers should consider the TO-18 package constraints during PCB layout. Verify that the circuit design accommodates the specific pinch-off voltage variations inherent to this high-reliability class compared to lower-tier alternatives.

Part Context

This component belongs to the 2N485x series of N-channel JFETs produced by Microchip Technology. The MV prefix specifically identifies the JANTXV grade, distinguishing it from JAN (2N4857) and other commercial variants. These devices are engineered for defense and space sectors where failure is not an option. The series shares similar electrical architectures but varies significantly in screening processes and guaranteed parameter limits based on the assigned reliability tier.

Replacement Considerations

Direct functional substitutes include the 2N4857 for non-critical applications or the MQ2N4859UB for surface-mount requirements. However, replacements must be evaluated against the original JANTXV qualification level. Lower-grade parts like the standard 2N4857 do not offer equivalent environmental resilience. Verify pin compatibility and thermal management capabilities before substituting.