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Product Detailed Parameters
- Description：JFET 2N-CH 50V TO71
- Series：U401
- Mfr：Linear Integrated Systems, Inc.
- Package：Bulk
- FET Type：2 N-Channel (Dual)
- Voltage - Breakdown (V(BR)GSS)：50 V
- Drain to Source Voltage (Vdss)：50 V
- Current - Drain (Idss) @ Vds (Vgs=0)：500 µA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：500 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：8pF @ 15V
- Resistance - RDS(On)：-
- Power - Max：300 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-71-6 Metal Can
- Supplier Device Package：TO-71
- Grade：-
- Qualification：-
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Overview
The U401 is a monolithic dual N-channel JFET switch manufactured by Linear Integrated Systems. It features low noise and low drift characteristics, with a typical gate-source voltage drift of 10µV/°C and input noise of 6nV/Hz at 10Hz. The device has a typical pinch-off voltage of 2.5V. It is housed in a TO-71 cylindrical metal package with six bottom-mounted wire terminals.
Feature Summary
- Monolithic dual N-channel JFET configuration
- Low drift gate-source voltage characteristic
- Low noise performance suitable for precision applications
- Metal cylindrical packaging
Applications
- Precision analog switching circuits
- Low-noise signal routing
- High-impedance buffer stages
Procurement Notes
Verify the manufacturer designation as Linear Integrated Systems or its successor entities like Micross Components (LSU401). Confirm the specific package variant matches the TO-71 form factor. Ensure the component meets the required environmental specifications for the intended deployment environment.
Selection Notes
Select this component for applications requiring low noise and minimal voltage drift in dual N-channel switching roles. Consider the TO-71 package constraints for board layout. Evaluate if the 2.5V typical pinch-off voltage aligns with the control logic levels available in the system design.
Part Context
This component belongs to a family of low-noise, low-drift monolithic JFET switches. Similar devices include the U402 and U405, which share comparable electrical characteristics but may differ in pinout or package style. These components are designed to replace older discrete JFET solutions with integrated stability.
Replacement Considerations
The LSU401 from Micross Components is documented as a replacement for the discontinued Siliconix U401. Verify pin compatibility and electrical parameter tolerances before substitution.
