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Product Detailed Parameters
- Description：JFET N-CH 40V TO18
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：40 V
- Current - Drain (Idss) @ Vds (Vgs=0)：175 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：4 V @ 0.5 nA
- Input Capacitance (Ciss) (Max) @ Vds：18pF @ 10V
- Resistance - RDS(On)：25 Ohms
- Power - Max：360 mW
- Operating Temperature：-65°C ~ 200°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-206AA, TO-18-3 Metal Can
- Supplier Device Package：TO-18 (TO-206AA)
- Grade：Military
- Qualification：MIL-PRF-19500/385
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Overview
The MX2N4856 is an N-channel Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. It operates with a Drain-Source Voltage (Vdss) and Gate-Source Breakdown Voltage (V(BR)GSS) of 40 V. The device supports a maximum power dissipation of 360 mW and features a typical zero-gate-voltage drain current (Idss) of 175 mA at 15 V. It is housed in a TO-18 metal can package for through-hole mounting and complies with MIL-PRF-19500/385 military standards.
Feature Summary
- Military-grade reliability compliant with MIL-PRF-19500/385 specifications
- High thermal stability supporting junction temperatures up to 200°C
- Metal can construction providing robust environmental protection
Applications
- High-reliability analog signal processing circuits
- Precision low-noise amplifier stages
- Harsh environment electronic systems requiring extended temperature operation
Procurement Notes
Verify the specific suffix code against official Microchip documentation to confirm exact performance binning and qualification level. Ensure procurement channels provide valid traceability records required for military applications. Confirm RoHS status, as this component may not meet standard environmental directives. Validate that the supplier offers genuine parts with appropriate quality certifications.
Selection Notes
Select this component when designing circuits requiring high voltage tolerance and strict adherence to military reliability standards. Consider the TO-18 package constraints for PCB layout and thermal management. Evaluate Idss variations across the specified range to ensure proper biasing in sensitive analog applications. Verify compatibility with existing system voltage levels and thermal requirements.
Part Context
This part belongs to the 2N4856 series of N-channel JFETs produced by Microchip Technology. The 'MX' prefix typically denotes a specific qualification or packaging variant within the broader family. These devices are engineered for demanding applications where standard commercial components do not suffice. They share core electrical characteristics with other members of the 2N485x series but may differ in testing rigor or packaging details.
Replacement Considerations
Direct substitutes include the base 2N4856 and related variants such as 2N4857, 2N4858, 2N4859, 2N4860, and 2N4861. Verify pinout compatibility and specific electrical parameter limits before substitution. Alternative prefixes like MQ or MV may indicate different qualification levels within the same functional family.
