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Product Detailed Parameters
- Description：JFET N-CH 40V TO92-3
- Series：-
- Mfr：onsemi
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：30 µA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：600 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：3pF @ 10V
- Resistance - RDS(On)：-
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The PN4117A is an N-Channel Switch designed for low current DC and audio applications. It features a Drain-Gate Voltage of 40 V and Gate-Source Voltage of -40 V. The Gate-Source Cutoff Voltage ranges from -0.6 to -1.8 V, while the Zero-Gate Voltage Drain Current is between 30 and 90 µA. Common Source Forward Transconductance spans 70 to 210 mmhos at 1.0 KHz. Input Capacitance is 3.0 pF, and Reverse Transfer Capacitance is 1.5 pF. Total Device Dissipation is 350 mW, with thermal resistance values of 125 °C/W junction-to-case and 357 °C/W junction-to-ambient.
Feature Summary
- Designed for low current DC and audio applications
- Provides excellent performance as input stages for sub-picoamp instrumentation or high impedance signal sources
Applications
- Low current DC switching
- Audio applications
- Input stages for sub-picoamp instrumentation
- High impedance signal source interfacing
Procurement Notes
Verify the component status carefully, as datasheets may indicate obsolete or discontinued status depending on the revision date. Confirm that the TO-92 package matches your board layout requirements. Ensure that the absolute maximum ratings, particularly regarding junction temperature limits, are respected in your design to maintain device serviceability under specified operating conditions.
Selection Notes
Select this component when designing circuits requiring high impedance inputs or sub-picoamp level instrumentation. The N-Channel configuration suits low current DC and audio tasks. Evaluate the thermal resistance parameters against your enclosure constraints. Verify that the gate-source cutoff voltage characteristics align with your specific signal source requirements for optimal switching performance.
Part Context
This device belongs to the Fairchild Semiconductor product line, specifically sourced from process 53. It is housed in a TO-92 package with three leads: Drain, Source, and Gate. The documentation indicates historical production by Fairchild Semiconductor Corporation, which has since undergone corporate changes affecting brand attribution and manufacturing continuity for legacy components.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Consult official manufacturer channels for current equivalent listings or updated component recommendations if this specific part number is no longer in active production.
