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Product Detailed Parameters
- Description：JFET N-CH 30V UB
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：30 V
- Drain to Source Voltage (Vdss)：30 V
- Current - Drain (Idss) @ Vds (Vgs=0)：8 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：800 mV @ 500 pA
- Input Capacitance (Ciss) (Max) @ Vds：18pF @ 10V
- Resistance - RDS(On)：60 Ohms
- Power - Max：360 mW
- Operating Temperature：-65°C ~ 200°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：3-SMD, No Lead
- Supplier Device Package：UB
- Grade：Military
- Qualification：MIL-PRF-19500/385
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Overview
The MX2N4861UB is a single N-channel Silicon Junction Field-Effect Transistor (JFET) manufactured by Microchip Technology. Designed for surface-mount applications, it features a maximum drain-source breakdown voltage of 30 V and a gate-source breakdown voltage of -30 V. The device supports a continuous drain current of 80 mA at zero gate-source voltage and exhibits an on-resistance of 60 Ohms. It handles a power dissipation of 1.8 W and operates within a temperature range of -65°C to +200°C.
Feature Summary
- High-temperature silicon construction enabling operation up to +200°C
- Surface-mount package configuration for automated assembly
- Single N-channel JFET topology with defined breakdown limits
Applications
- High-reliability analog signal processing circuits
- Military and aerospace electronic systems requiring extended thermal tolerance
- Precision low-noise amplifier stages
Procurement Notes
Verify the specific suffix against official Microchip documentation to confirm exact packaging and tape-and-reel specifications. Ensure the ordering information matches the required surface-mount variant. Confirm compliance requirements such as RoHS status directly from the manufacturer's datasheet before procurement.
Selection Notes
Select this component when high-temperature stability and surface-mount integration are required. Compare the 30 V breakdown and 1.8 W dissipation ratings against circuit demands. Verify that the 60 Ohm on-resistance meets the impedance requirements for the intended application environment.
Part Context
This part belongs to the Microchip JFET family, specifically designed for high-reliability environments. It utilizes silicon technology and is categorized under transistors. The device serves as a discrete semiconductor solution for specialized analog applications where standard commercial components may not suffice due to thermal or reliability constraints.
Replacement Considerations
Consult official substitution guides for compatible JFETs with matching 30 V ratings and SMD packages. Verify pinout compatibility and thermal characteristics before replacing.
