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2N4391UBC is listed in the Jfets range at ChipApex. The manufacturer field lists Microchip Technology. Its product description is JFET N-CH UBC. Review the specifications below when checking this part for your BOM.
The Microchip Technology 2N4391UBC is a silicon N-channel Junction Field-Effect Transistor (JFET) housed in a TO-18 metal can package. It features a maximum drain-source breakdown voltage of 40 V and a gate-source breakdown voltage of -40 V. The device supports a continuous drain current of 100 mA with a power dissipation rating of 360 mW. Operating characteristics include a minimum operating temperature of -65°C and a maximum operating temperature of +175°C, ensuring reliability across extreme thermal environments.
Verify the specific suffix 'UBC' against official Microchip documentation to confirm pinout and electrical tolerances, as variations exist within the JFET family. Ensure the procurement channel provides traceable component history. Confirm RoHS status directly with the manufacturer, as legacy metal can packages may have distinct compliance classifications compared to modern plastic equivalents.
Select this component when high-temperature stability and low noise are critical requirements. Compare the 40 V breakdown voltage and 360 mW power dissipation against circuit demands. Verify that the TO-18 package dimensions fit the mechanical constraints. Consider the -65°C to +175°C operating range for environmental suitability compared to standard commercial grade alternatives.
This part belongs to the Microchip JFET portfolio, specifically designed for military and aerospace-grade applications requiring extended temperature ranges. The 2N4391 series is known for consistent gain-bandwidth product and low input bias current. The UBC designation typically indicates specific binning or testing criteria defined by the manufacturer for high-reliability standards.
Publicly confirmed direct substitutes include the MQ2N4391 and MX2N4391UB from Microchip Technology. These variants share identical electrical specifications and pinouts but may differ in packaging suffixes or testing standards. Verify compatibility before substitution.
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