PN4393_D26Z JFET N-Channel Transistor Equivalent & Substitute Parts

Part Overview

The PN4393_D26Z is an N-Channel JFET transistor manufactured by onsemi, rated for 30 V breakdown voltage and 625 mW power dissipation in a TO-92-3 through-hole package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The PN4393_D26Z serves applications requiring N-Channel JFET functionality with specified electrical characteristics and through-hole mounting compatibility.

Substiute Parts

PN4393_D26Z

onsemiIn Stock: 1017PN4393_D26Z Datasheet

Current PartRFQ

PN4393 TRA

Central Semiconductor CorpIn Stock: 2725PN4393 TRA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PN4393_D26Z is determined by the following critical parameters:

• FET Type: Must be N-Channel JFET
• Voltage - Breakdown (V(BR)GSS): Substitute must meet or exceed 30 V
• Current - Drain (Idss) @ Vds (Vgs=0): Must match 5 mA @ 20 V specification
• Voltage - Cutoff (VGS off) @ Id: Must match 500 mV @ 1 nA specification
• Input Capacitance (Ciss) (Max) @ Vds: Must match 14 pF @ 20 V specification
• Resistance - RDS(On): Must match 100 Ohms specification
• Power - Max: Must meet or exceed 625 mW rating
• Package / Case: Must be TO-92-3 (TO-226AA) through-hole configuration

The PN4393 TRA from Central Semiconductor Corp meets all substitution criteria, with an elevated breakdown voltage rating of 40 V, providing additional design margin while maintaining all other electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The PN4393 TRA is a direct functional substitute for the PN4393_D26Z. Selection between these parts should be based on the following factors:

Product Status: The PN4393_D26Z is obsolete, while the PN4393 TRA is active. For new designs and ongoing procurement, the PN4393 TRA is the appropriate choice.

Compliance & Certifications: The PN4393 TRA carries RoHS3 compliance certification, whereas the PN4393_D26Z does not specify RoHS status. Both parts are REACH Unaffected and classified under ECCN EAR99.

Electrical Performance: The PN4393 TRA provides a 40 V breakdown voltage rating compared to the 30 V rating of the PN4393_D26Z. This higher rating offers additional design margin without compromising any other electrical specifications. The extended operating temperature range of the PN4393 TRA (-65 to 150 °C) provides improved low-temperature performance relative to the PN4393_D26Z (-55 to 150 °C).

Packaging & Mounting: Both parts use identical TO-92-3 through-hole packaging, ensuring direct mechanical and electrical compatibility on existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the PN4393 TRA replace the PN4393_D26Z in existing designs?

A: Yes. The PN4393 TRA meets or exceeds all electrical specifications of the PN4393_D26Z while maintaining identical package geometry and pin configuration. Direct substitution is electrically and mechanically compatible.

Q: What is the significance of the higher 40 V breakdown voltage on the PN4393 TRA?

A: The PN4393 TRA's 40 V breakdown voltage exceeds the PN4393_D26Z's 30 V rating. This provides additional design margin and protection against voltage transients. All other electrical parameters remain identical, so this higher rating does not affect circuit operation.

Q: Are there any compliance differences between these parts?

A: The PN4393 TRA is RoHS3 compliant, while the PN4393_D26Z does not specify RoHS status. Both parts are REACH Unaffected. For applications requiring RoHS compliance, the PN4393 TRA is the appropriate selection.

Q: Do these parts have identical pin configurations?

A: Yes. Both the PN4393_D26Z and PN4393 TRA use the TO-92-3 (TO-226AA) package with formed leads. Pin assignments and mechanical dimensions are identical, enabling direct PCB substitution without layout modifications.

Q: What is the operating temperature range difference?

A: The PN4393_D26Z operates from -55 to 150 °C, while the PN4393 TRA operates from -65 to 150 °C. The PN4393 TRA provides an extended low-temperature operating range of 10 °C, suitable for applications requiring enhanced cold-temperature performance.

Q: Are the drain current and cutoff voltage specifications identical?

A: Yes. Both parts specify 5 mA drain current at 20 V (Vgs=0) and 500 mV cutoff voltage at 1 nA. Input capacitance, on-resistance, and maximum power dissipation are also identical across both devices.