FQP5N30 Equivalent & Substitute Parts

Part Overview

The FQP5N30 is an N-Channel MOSFET manufactured by onsemi, rated for 300V drain-to-source voltage with 5.4A continuous drain current at 25°C. This device is packaged in a Through Hole TO-220-3 configuration and is part of the QFET® series. The FQP5N30 is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

FQP5N30

onsemiIn Stock: 1695FQP5N30 Datasheet

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STP5NK50Z

STMicroelectronicsIn Stock: 5458STP5NK50Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FQP5N30 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• FET Type: N-Channel topology must be maintained
• Drain to Source Voltage (Vdss): Substitute must equal or exceed 300V
• Continuous Drain Current (Id): Substitute must support the application's current requirements
• Power Dissipation: Substitute must support thermal requirements
• Operating Temperature Range: Substitute must cover the required temperature envelope
• Gate Drive Voltage: Substitute must be compatible with existing gate drive circuitry

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole configuration required
• Package / Case: TO-220 or TO-220-3 compatible pinout

The STP5NK50Z from STMicroelectronics meets these substitution criteria through equivalent electrical ratings and compatible packaging, while offering active product status and enhanced availability.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The FQP5N30 is classified as obsolete, whereas the STP5NK50Z maintains active product status. Active status ensures continued manufacturing support, documented availability, and compliance with current regulatory standards.

Compliance and Certifications: Both devices share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and Moisture Sensitivity Level (MSL 1 - Unlimited). The STP5NK50Z carries RoHS3 compliance, providing additional environmental regulatory alignment for new designs and procurement cycles.

Electrical Performance: The STP5NK50Z provides higher voltage rating (500V versus 300V), enabling use in higher voltage applications while maintaining compatibility with the 300V application envelope of the FQP5N30. The continuous drain current of the STP5NK50Z (4.4A) is lower than the FQP5N30 (5.4A); applications requiring the full 5.4A rating must evaluate current margin requirements.

Thermal and Packaging: Both devices support identical power dissipation (70W), operating temperature range (-55°C to 150°C), and Through Hole TO-220-3 mounting. Thermal performance is equivalent for equivalent thermal management implementations.

Availability: The STP5NK50Z is available in higher inventory quantities (5415 pieces) compared to the FQP5N30 (1600 pieces), supporting procurement continuity and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the STP5NK50Z directly replace the FQP5N30 in existing designs?

A: Direct replacement is possible when the application current requirement does not exceed 4.4A continuous drain current. The STP5NK50Z's higher voltage rating (500V) is compatible with 300V applications. Gate drive voltage compatibility (±30V maximum for both devices) and TO-220-3 pinout compatibility support direct substitution in most circuit topologies. Applications operating at or near the FQP5N30's 5.4A rating require current margin analysis.

Q: What are the key electrical differences between these devices?

A: The primary differences are drain-to-source voltage rating (FQP5N30: 300V; STP5NK50Z: 500V), continuous drain current (FQP5N30: 5.4A; STP5NK50Z: 4.4A), and on-resistance characteristics (FQP5N30: 900mOhm @ 2.7A, 10V; STP5NK50Z: 1500mOhm @ 2.2A, 10V). Both devices maintain identical power dissipation (70W), operating temperature range, and gate voltage specifications.

Q: Are the packages physically identical?

A: Both devices use Through Hole TO-220-3 packaging with compatible pinout configurations. Physical mounting and thermal interface requirements are equivalent.

Q: Why is the STP5NK50Z recommended over the FQP5N30?

A: The STP5NK50Z carries active product status, ensuring ongoing manufacturing support and regulatory compliance. The FQP5N30 is obsolete, limiting future availability and support. Both devices meet the electrical and mechanical requirements for substitution, but active status provides supply chain continuity.

Q: What compliance certifications apply to both devices?

A: Both devices are REACH Unaffected, classified as EAR99 for export control purposes, and carry MSL 1 (Unlimited) moisture sensitivity rating. The STP5NK50Z additionally carries RoHS3 compliance certification.

Q: Are there applications where the STP5NK50Z cannot replace the FQP5N30?

A: Applications requiring continuous drain current exceeding 4.4A cannot use the STP5NK50Z as a direct replacement. Additionally, designs with tight on-resistance specifications may require evaluation, as the STP5NK50Z exhibits higher on-resistance at comparable gate drive voltages.