STP10NK70Z Equivalent & Substitute Parts

Part Overview

The STP10NK70Z is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 700V drain-to-source voltage with 8.6A continuous drain current at 25°C. This device is packaged in a TO-220-3 through-hole configuration and is part of the SuperMESH™ series. The product status is listed as Obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

STP10NK70Z

STMicroelectronicsIn Stock: 1181STP10NK70Z Datasheet

Current PartRFQ

AOT7S65L

Alpha & Omega Semiconductor Inc.In Stock: 2404AOT7S65L Datasheet

SimilarRFQ

IRFB9N65APBF

Vishay SiliconixIn Stock: 1968IRFB9N65APBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STP10NK70Z is determined by the following critical parameters:

Voltage Rating (Vdss): Substitute parts must have a Vdss rating equal to or greater than 700V. This ensures the device can withstand the same or higher voltage stress in the application circuit.

Current Rating (Id): Substitute parts must have a continuous drain current rating equal to or greater than 8.6A at 25°C to maintain equivalent current-handling capability.

On-State Resistance (Rds On): The maximum on-state resistance must be comparable to or lower than 850mOhm to ensure similar power dissipation characteristics and thermal performance.

Gate Charge (Qg): Gate charge values should be evaluated for switching speed and drive circuit compatibility. Lower gate charge values indicate faster switching characteristics.

Power Dissipation: Substitute parts should have power dissipation ratings equal to or greater than 150W to handle equivalent thermal loads.

Package and Mounting: All substitute parts must use the TO-220-3 through-hole package to ensure mechanical and thermal interface compatibility.

Operating Temperature Range: Substitute parts must support the full operating temperature range of -55°C to 150°C.

Compliance and Status: Substitute parts must maintain RoHS3 compliance and MSL Level 1 rating for moisture sensitivity.

Parameter Comparison

Engineering Selection Recommendations

IRFB9N65APBF (Vishay Siliconix): This part is the preferred substitute for the STP10NK70Z. The IRFB9N65APBF maintains Active product status, ensuring long-term availability and manufacturing support. While the Vdss rating is 650V compared to the main part's 700V, the continuous drain current of 8.5A closely matches the 8.6A specification. Power dissipation capability of 167W exceeds the 150W requirement. The gate charge of 48nC provides faster switching characteristics than the main part. All compliance certifications (RoHS3, MSL Level 1) are maintained. This device is suitable for new designs and ongoing production.

AOT7S65L (Alpha & Omega Semiconductor Inc.): This part is a secondary substitute option. The product status is listed as Not For New Designs, limiting its suitability for new applications. The Vdss rating of 650V is lower than the main part's 700V specification. The continuous drain current of 7A is below the 8.6A requirement, and power dissipation of 104W is below the 150W specification. However, the on-state resistance of 650mOhm is superior to the main part. This device maintains RoHS3 compliance and MSL Level 1 rating. Use of this part should be restricted to legacy system maintenance where voltage and current derating are acceptable.

Compliance Considerations: All three devices maintain RoHS3 compliance and MSL Level 1 moisture sensitivity ratings, ensuring compatibility with modern manufacturing and environmental standards. REACH status is unaffected for all parts.

Frequently Asked Questions (FAQ)

Q: Can the AOT7S65L be used as a direct replacement for the STP10NK70Z?

A: The AOT7S65L is not a direct replacement. The voltage rating is reduced from 700V to 650V, and the continuous drain current is reduced from 8.6A to 7A. Application circuits operating at or near the maximum voltage and current specifications of the STP10NK70Z will not function properly with the AOT7S65L. This part is suitable only for applications with design margins that accommodate lower voltage and current ratings.

Q: Is the IRFB9N65APBF suitable for new product designs?

A: Yes. The IRFB9N65APBF carries Active product status from Vishay Siliconix, indicating ongoing manufacturing support and long-term availability. This device is appropriate for new designs requiring an N-Channel MOSFET with 650V voltage rating and approximately 8.5A continuous drain current in a TO-220-3 package.

Q: What is the significance of the gate charge difference between these parts?

A: Gate charge (Qg) affects switching speed and drive circuit requirements. The STP10NK70Z has a gate charge of 90nC, while the IRFB9N65APBF has 48nC and the AOT7S65L has 9.2nC. Lower gate charge values enable faster switching transitions and reduce drive circuit power consumption. When substituting parts, verify that the gate drive circuit can accommodate the different gate charge specifications.

Q: Why is the voltage rating important for substitution?

A: The Vdss rating defines the maximum voltage the device can withstand between drain and source terminals. The STP10NK70Z is rated for 700V, while both substitute parts are rated for 650V. In applications operating near the maximum voltage specification, the lower-rated substitutes may experience reduced reliability or failure. Substitution is only valid if the application circuit operates below 650V.

Q: Are all three parts compatible with the same PCB layout and thermal management design?

A: All three parts use the TO-220-3 through-hole package, ensuring mechanical compatibility with existing PCB layouts and heatsink mounting interfaces. However, thermal management design must account for differences in power dissipation. The STP10NK70Z is rated for 150W, the IRFB9N65APBF for 167W, and the AOT7S65L for 104W. Applications requiring the full 150W dissipation capability should not use the AOT7S65L without additional thermal management modifications.

Q: What does "Not For New Designs" mean for the AOT7S65L?

A: This product status indicates that Alpha & Omega Semiconductor Inc. is not recommending this part for new product development. The manufacturer may have discontinued active development, reduced manufacturing capacity, or released superior alternatives. While the part may remain available from inventory, long-term supply cannot be guaranteed. New designs should prioritize parts with Active status, such as the IRFB9N65APBF.

Q: How do the on-state resistance values affect circuit performance?

A: On-state resistance (Rds On) directly impacts power dissipation and heat generation. The STP10NK70Z has 850mOhm, the IRFB9N65APBF has 930mOhm, and the AOT7S65L has 650mOhm. Lower resistance values reduce power loss and heat generation. The AOT7S65L offers superior on-state resistance performance, but this advantage is offset by its lower voltage and current ratings in most applications.

Q: Are there any compliance or regulatory differences between these parts?

A: All three parts maintain identical compliance certifications: RoHS3 compliance, MSL Level 1 moisture sensitivity rating, REACH unaffected status, and EAR99 ECCN classification. No regulatory or environmental compliance barriers exist for substitution from a compliance perspective.