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Product Detailed Parameters
- Description：.5V 3V 50MA 625MW TH JFET N CHAN
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Box
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：5 mA @ 20 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：500 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：14pF @ 20V
- Resistance - RDS(On)：100 Ohms
- Power - Max：625 mW
- Operating Temperature：-65°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The PN4393 PBFREE is an N-channel silicon Junction Field-Effect Transistor (JFET) manufactured by Central Semiconductor Corp. It operates in depletion mode within a TO-92 through-hole package. Key electrical specifications include a maximum drain-source voltage of 40V, a maximum gate-source voltage of -40V, and a maximum power dissipation of 625mW. The device features a maximum on-resistance of 100 ohms and a typical feedback capacitance of 3.5 pF.
Feature Summary
- N-channel silicon construction for small signal applications
- Depletion mode operation with low feedback capacitance
- Through-hole TO-92 packaging for standard mounting
Applications
- Small signal amplification circuits
- Low noise pre-amplifier stages
- Constant current source implementations
Procurement Notes
Verify the specific ordering suffix to ensure compliance with RoHS directives and lead-free soldering requirements. Confirm that the TO-92 package variant matches the intended PCB footprint. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability of the silicon junction FET component.
Selection Notes
Select this component for designs requiring an N-channel JFET with a 40V breakdown rating and moderate on-resistance. The TO-92 package suits prototyping or low-volume production where surface mount options are unavailable. Ensure the circuit design accommodates the depletion mode characteristic, which conducts current at zero gate-source voltage.
Part Context
This discrete semiconductor belongs to Central Semiconductor's portfolio of small signal transistors. The company specializes in providing reliable N-channel and P-channel JFETs for various electronic applications. The PN4393 serves as a standard solution for analog signal processing tasks requiring high input impedance and low noise performance.
Replacement Considerations
Consult official substitution guides for equivalent N-channel JFETs with matching 40V ratings and TO-92 packages. Verify pinout compatibility and thermal characteristics before replacing the original component in existing designs.
