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Product Detailed Parameters
- Description：JFET N-CH 25V TO92-3
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：25 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：30 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：1 V @ 3 nA
- Input Capacitance (Ciss) (Max) @ Vds：30pF @ 10V (VGS)
- Resistance - RDS(On)：10 Ohms
- 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)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The PN5434 is an N-channel Junction Field-Effect Transistor (JFET) manufactured by onsemi, formerly Fairchild Semiconductor. It features a maximum drain-source voltage of 25 V and a continuous drain current of 30 mA at Vgs=0. The device has a maximum power dissipation of 350 mW and operates within a temperature range of -55°C to 150°C TJ. It utilizes a TO-92-3 through-hole package with a gate-source breakdown voltage of 25 V and an input capacitance of 30 pF @ 10V.
Feature Summary
- N-channel JFET configuration for signal amplification and switching applications
- Through-hole TO-92-3 package design for standard PCB mounting
- Wide operating temperature range suitable for industrial environments
Applications
- Low-noise preamplifier stages in audio equipment
- Constant current source circuits
- Analog switch implementations
Procurement Notes
Verify the manufacturer status as this component is listed as obsolete or discontinued by onsemi. Confirm availability through secondary market distributors or authorized surplus channels. Check for RoHS compliance documentation if required for specific regulatory standards. Ensure the TO-92-3 package compatibility with existing board layouts before procurement.
Selection Notes
Select this component for designs requiring an N-channel JFET with low input capacitance and moderate voltage ratings. Consider the TO-92-3 package constraints for space-limited through-hole applications. Evaluate thermal management requirements given the 350 mW power dissipation limit. Compare against newer equivalents if long-term supply stability is critical for the product lifecycle.
Part Context
The PN5434 belongs to the PN543 series of N-channel JFETs produced by onsemi. This family of components is designed for general-purpose analog applications. The part represents legacy semiconductor technology from Fairchild Semiconductor, now integrated into onsemi's portfolio. It serves as a discrete solution for analog signal processing tasks.
Replacement Considerations
Consult official datasheets for pin-compatible alternatives such as the 2N5457 or similar N-channel JFETs. Verify electrical parameter equivalence including Idss, V(BR)GSS, and Ciss before substitution. Ensure the replacement package matches the TO-92-3 form factor.
