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Product Detailed Parameters
- Description：JFET N-CH 1MA 3VTFP
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：140 µA @ 2 V
- Current Drain (Id) - Max：1 mA
- Voltage - Cutoff (VGS off) @ Id：100 mV @ 1 µA
- Input Capacitance (Ciss) (Max) @ Vds：5pF @ 2V
- Resistance - RDS(On)：-
- Power - Max：100 mW
- Operating Temperature：150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：3-SMD, Flat Leads
- Supplier Device Package：3-VTFP
- Grade：-
- Qualification：-
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Overview
The TF208TH-4-TL-H is an N-channel Junction Field-Effect Transistor (JFET) manufactured by onsemi. It features a maximum drain current of 1 mA and a power dissipation rating of 100 mW. The device utilizes a 3-VTFP surface-mount package, also described as 3-SMD flat lead. Key electrical parameters include a gate-source cutoff voltage of 100 mV at 1 µA drain current and a typical drain-source current of 140 µA at Vds=5V. Input capacitance is specified as 3.5 pF at 5V. The component supports a junction temperature up to 150°C and operates within a standard commercial temperature range.
Feature Summary
- N-channel JFET configuration for signal processing applications
- Low input capacitance suitable for high-frequency circuits
- Surface-mount 3-VTFP package design for compact layouts
Applications
- Electret condenser microphone preamplifiers
- High-impedance buffer stages
- Low-noise analog signal conditioning
Procurement Notes
This component is officially listed as obsolete or discontinued by the manufacturer. Verification of availability requires checking distributor stock status directly, as new production is not guaranteed. Sourcing should focus on existing inventory from authorized channels. Designers must confirm end-of-life status before finalizing specifications to avoid supply chain disruptions in future production runs.
Selection Notes
Select this part for low-power, high-impedance analog switching or amplification tasks requiring minimal input capacitance. The 1 mA current limit defines its operational boundary for small-signal applications. Ensure the circuit design accommodates the specific Idss and Vgs(off) tolerances inherent to JFET technology. The 3-VTFP package dictates PCB footprint requirements for surface-mount assembly processes.
Part Context
The TF208TH-4-TL-H belongs to the TF202/TF208 series of N-channel JFETs from onsemi. These devices are engineered for audio and sensor interface applications where low noise and high input impedance are critical. The series typically includes variants with different pin configurations or slight parameter variations, all sharing the same fundamental JFET architecture and low-power characteristics.
Replacement Considerations
Public confirmed substitute part numbers are not provided in the available documentation. Due to the discontinued status, direct cross-referencing with active equivalents requires independent technical validation against specific circuit requirements.
