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Product Detailed Parameters
- Description：4V 10V 50MA 625MW TH JFET N CHAN
- Series：PN4391
- Mfr：Central Semiconductor Corp
- Package：Tape & Box (TB)
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：50 mA @ 20 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：4 V @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：14pF @ 20V
- Resistance - RDS(On)：30 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 PN4391 APM PBFREE is an N-channel Silicon Junction Field-Effect Transistor (JFET) manufactured by Central Semiconductor Corp. It features a maximum Drain-Source Voltage (Vds) of 40 V and a Gate-Source Voltage (Vgs) rating of 40 V. The device supports a continuous Drain Current (Id) of 50 mA with a Power Dissipation (Pd) capacity of 625 mW. Its typical On-Resistance (Rds(on)) is specified at 30 Ohms. The component is housed in a TO-92-3 package, suitable for through-hole mounting applications requiring low-noise amplification or switching.
Feature Summary
- N-channel silicon JFET construction for signal processing
- Low on-resistance characteristic for efficient conduction
- High voltage tolerance for gate and drain-source terminals
- Through-hole TO-92-3 packaging for standard board integration
Applications
- Low-noise preamplifier stages
- Analog switching circuits
- Constant current source implementations
- Voltage-controlled resistor applications
Procurement Notes
Verify the specific suffix 'APM' against the manufacturer's official datasheet to confirm package type and tape-and-reel versus bulk availability. Ensure RoHS compliance documentation matches the 'PBFREE' designation. Cross-reference the part number with authorized distributors to confirm current production status and lead times, as supply chain data may vary by region.
Selection Notes
Select this component when an N-channel JFET with 40 V breakdown and 50 mA current capability is required. Compare Rds(on) specifications against circuit impedance requirements. Verify that the TO-92-3 package fits the PCB footprint constraints. Consider thermal management needs given the 625 mW power dissipation limit in enclosed environments.
Part Context
This part belongs to Central Semiconductor's discrete JFET lineup, designed for analog signal handling. It complements other N-channel variants in the series, offering standardized pinouts for easy replacement in legacy designs. The product line emphasizes reliability in industrial and commercial electronics, supporting both small-signal amplification and switching functions within compact form factors.
Replacement Considerations
Consult the official datasheet for direct pin-compatible substitutes from Central Semiconductor or other manufacturers. Verify electrical parameters such as Vgs(off), Idss, and Rds(on) match the original design requirements. Ensure the replacement maintains the same TO-92-3 package and polarity configuration.
