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Product Detailed Parameters
- Description：JFET N-CH 20V 1MA SC70-3
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：20 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：150 µA @ 5 V
- Current Drain (Id) - Max：1 mA
- Voltage - Cutoff (VGS off) @ Id：600 mV @ 1 µA
- Input Capacitance (Ciss) (Max) @ Vds：3.5pF @ 5V
- Resistance - RDS(On)：-
- Power - Max：100 mW
- Operating Temperature：150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SC-70, SOT-323
- Supplier Device Package：SC-70-3 (SOT323)
- Grade：-
- Qualification：-
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Overview
The FJX597JHTF is an N-channel Junction Field-Effect Transistor (JFET) manufactured by Fairchild Semiconductor. It operates in depletion mode and is housed in a surface-mount SOT-323 package. The device features a drain-source breakdown voltage of 20 V and a maximum continuous drain current of 1 mA. Key electrical characteristics include a gate-source cutoff voltage of 600 mV at 1 µA and a typical input capacitance of 3.5 pF at 5 V. The component supports a maximum junction temperature of 150°C and has a power dissipation rating of 100 mW.
Feature Summary
- N-channel JFET technology designed for low-power signal processing applications
- Integrated into a compact SOT-323 surface-mount package for space-constrained designs
- Capable of operating at elevated temperatures up to 150°C junction limit
Applications
- Low-noise analog signal amplification
- High-impedance switching circuits
- Constant current source implementations
Procurement Notes
Verify the specific suffix 'JHTF' against official Fairchild documentation to confirm tape-and-reel packaging quantities and lead times. Ensure compatibility with RoHS directives if required by the target application environment. Cross-reference datasheet revisions to validate parameter consistency before finalizing procurement orders.
Selection Notes
Select this component when a depletion-mode N-channel JFET is required for high-input impedance applications. The 20 V breakdown voltage suits low-voltage logic interfaces. Verify that the 1 mA drain current meets circuit load requirements. Consider the SOT-323 footprint constraints during PCB layout planning.
Part Context
This part belongs to the Fairchild JFET family, specifically utilizing the JH series designation for N-channel devices. It shares functional similarities with other small-signal JFETs but is distinguished by its specific pinout and thermal characteristics within the SOT-323 form factor. It serves as a discrete solution for analog front-end stages.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided reference data. Engineers should evaluate generic N-channel JFETs with matching 20 V breakdown and SOT-323 packaging. Verify pinout compatibility and thermal resistance parameters before implementing any cross-compatibility substitutions.
