2N5458 JFET N-Channel Transistor: Equivalent & Substitute Parts

Part Overview

The 2N5458 is an N-Channel JFET transistor manufactured by onsemi, designed for through-hole applications in the TO-92 package. This device operates at 25 V drain-to-source voltage with a maximum power dissipation of 310 mW. The 2N5458 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

2N5458

onsemiIn Stock: 59462N5458 Datasheet

Current PartRFQ

J210 TO-92 3L ROHS

Linear Integrated Systems, Inc.In Stock: 1778J210 TO-92 3L ROHS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N5458 is determined by strict equivalence across the following electrical and mechanical parameters:

• FET Type: N-Channel configuration
• Voltage Rating: Drain-to-source voltage (Vdss) of 25 V minimum
• Drain Current (Idss): 2 mA @ 15 V
• Gate Cutoff Voltage (VGS off): 1 V @ specified drain current
• Package Type: TO-92 through-hole configuration with 3-lead pinout
• Power Dissipation: Minimum 310 mW capability

The J210 TO-92 3L ROHS meets these substitution criteria. Both devices share identical N-Channel JFET topology, matching voltage ratings, drain current specifications, and through-hole TO-92 packaging. The J210 maintains functional and pin compatibility while offering enhanced specifications in certain parameters and improved compliance status.

Parameter Comparison

Engineering Selection Recommendations

The J210 TO-92 3L ROHS is a direct functional substitute for the 2N5458. Selection between these devices is determined by application requirements and compliance mandates:

Use 2N5458 only in legacy systems where existing inventory is available and no regulatory compliance updates are required. The device is obsolete and subject to availability constraints.

Use J210 for new designs, production continuity, and applications requiring regulatory compliance. The J210 is an active product with ROHS3 compliance certification, ensuring long-term availability and adherence to environmental standards. The J210 provides superior power dissipation (360 mW vs. 310 mW), lower input capacitance (4 pF vs. 7 pF), and an extended operating temperature range (−55°C to 150°C vs. up to 135°C). Both devices maintain identical electrical performance at the specified operating points and share identical TO-92 pinout configuration.

Frequently Asked Questions (FAQ)

Q: Can the J210 replace the 2N5458 in existing circuits?

A: Yes. The J210 is a direct substitute. Both devices are N-Channel JFETs with identical voltage ratings (25 V Vdss), matching drain current specifications (2 mA @ 15 V), and identical TO-92 three-lead pinout. No circuit modifications are required.

Q: What are the key differences between these devices?

A: The J210 offers higher maximum power dissipation (360 mW vs. 310 mW), lower input capacitance (4 pF vs. 7 pF), and an extended operating temperature range (−55°C to 150°C vs. up to 135°C). The J210 is ROHS3 compliant, while the 2N5458 is not. Both devices maintain identical electrical performance at specified operating points.

Q: Why is the 2N5458 listed as obsolete?

A: The 2N5458 is classified as obsolete by the manufacturer. This status indicates that the device is no longer in active production and may face availability constraints. The J210 is recommended for new designs and production continuity.

Q: Are the packages physically identical?

A: Both devices use the TO-92 through-hole package with three leads. The 2N5458 is specified as TO-92-3 Long Body, while the J210 is specified as TO-92-3. Physical compatibility should be confirmed for applications with strict mechanical constraints, though both are standard TO-92 configurations suitable for through-hole PCB assembly.

Q: Does the lower input capacitance of the J210 affect circuit performance?

A: The J210 input capacitance (4 pF @ 15 V) is lower than the 2N5458 (7 pF @ 15 V). This difference may improve high-frequency performance in sensitive applications. For most general-purpose applications, this difference is not significant. Circuit-specific performance validation is determined by application requirements.

Q: What compliance certifications apply to each device?

A: The 2N5458 is RoHS non-compliant. The J210 is ROHS3 compliant and REACH unaffected. Both devices carry EAR99 ECCN classification and identical HTSUS codes (8541.21.0095). The J210 is suitable for applications requiring environmental compliance standards.