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The Toshiba 2SK208-GR(TE85L,F) is a silicon N-channel junction field-effect transistor (JFET) designed for general-purpose, impedance conversion, and condenser microphone applications. It features a high gate-drain breakdown voltage of −50 V and an extremely low gate cut-off current of −1.0 nA maximum at −30 V. The device offers a typical noise figure of 0.5 dB at 120 Hz with a 100 kΩ source resistance. Electrical characteristics include a drain current range of 2.6 to 6.5 mA and a forward transfer admittance of 1.2 mS. It operates within a junction temperature range of −55 °C to 125 °C.
Verify the specific GR suffix classification during procurement to ensure the correct drain current range of 2.6 to 6.5 mA. Confirm that the TE85L,F ordering suffix corresponds to the required SC-59 surface-mount package configuration. Ensure compliance with RoHS directives and verify environmental specifications directly with the manufacturer or authorized distributor before finalizing orders.
Select this component when a high-input-impedance JFET with low noise characteristics is required for signal conditioning. The GR variant specifically targets applications needing higher drain currents compared to standard R or O classifications. Evaluate thermal derating requirements carefully, as the power dissipation limit is restricted to 100 mW in surface-mount configurations.
This part belongs to the 2SK208 series of N-channel silicon JFETs manufactured by Toshiba Semiconductor and Storage. The series is engineered for small-signal processing tasks where high input impedance and low distortion are critical. The TE85L,F suffix indicates a specific tape-and-reel packaging format compatible with automated surface-mount assembly processes.
Direct substitutes may include other N-channel JFETs with similar breakdown voltages and noise figures. Verify pinout compatibility and electrical parameter overlaps, particularly the drain current range and forward transfer admittance, before implementing any cross-brand replacements.
The GR classification specifies a drain current (IDSS) range of 2.6 to 6.5 mA at VDS = 10 V and VGS = 0.
The device exhibits a typical noise figure of 0.5 dB at 120 Hz when driven by a source resistance of 100 kΩ.
The absolute maximum rating for gate current is 10 mA, but the gate-source cut-off voltage can reach up to −5.0 V under specific test conditions.