NDS8936 Equivalent & Substitute Parts

Part Overview

The NDS8936 is a dual N-channel MOSFET array manufactured by onsemi, designed for surface mount applications in 8-SOIC packaging. This component features a 30V drain-to-source voltage rating with 5.3A continuous drain current capability and logic level gate operation. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

NDS8936

onsemiIn Stock: 22973NDS8936 Datasheet

Current PartRFQ

FDS6930B

onsemiIn Stock: 60223FDS6930B Datasheet

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IRF7103TRPBF

Infineon TechnologiesIn Stock: 17412IRF7103TRPBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NDS8936 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Configuration: 2 N-Channel (Dual) MOSFET array
• Package: 8-SOIC surface mount form factor
• Drain-to-Source Voltage (Vdss): Minimum 30V rating
• Continuous Drain Current (Id): Minimum 5.3A capability
• Maximum Power Dissipation: 900mW or greater
• Operating Temperature Range: -55°C to 150°C (TJ)

Substitution Logic: Parts meeting all primary criteria are classified as direct substitutes. The FDS6930B meets all primary parameters with equivalent or superior electrical performance. The IRF7103TRPBF shares the same package and configuration but operates at higher voltage (50V) and lower current (3A), making it suitable only for applications where the reduced current rating and elevated voltage capability do not create design conflicts.

Parameter Comparison

Engineering Selection Recommendations

FDS6930B (onsemi): The FDS6930B is the primary substitute for the NDS8936. Both parts share identical voltage and power ratings, equivalent package geometry, and dual N-channel configuration. The FDS6930B delivers 5.5A continuous drain current, exceeding the NDS8936 specification of 5.3A. On-resistance characteristics are comparable (38mOhm versus 35mOhm), ensuring similar thermal performance in equivalent circuit topologies. The FDS6930B carries ROHS3 compliance and active Last Time Buy status, providing extended procurement availability. This part is suitable for direct replacement in all applications where the NDS8936 was originally specified.

IRF7103TRPBF (Infineon Technologies): The IRF7103TRPBF is a secondary substitute applicable only to applications where reduced current requirements and elevated voltage capability are compatible with circuit design parameters. This part operates at 50V Vdss and 3A continuous drain current, representing a trade-off between voltage headroom and current capacity. The significantly higher on-resistance (130mOhm) results in increased power dissipation and thermal generation compared to the NDS8936. The IRF7103TRPBF maintains identical package form factor and operating temperature range. This part is suitable for replacement only when circuit topology permits operation at reduced current levels and higher voltage margins are beneficial. The part carries ROHS3 compliance and maintains Active product status.

Frequently Asked Questions (FAQ)

Q: Can the FDS6930B directly replace the NDS8936 without circuit modification?

A: Yes. The FDS6930B meets or exceeds all electrical parameters of the NDS8936 within the same package footprint. Voltage rating, current capacity, power dissipation, and operating temperature range are equivalent or superior. No circuit redesign is required for direct substitution.

Q: What are the limitations of using IRF7103TRPBF as a substitute?

A: The IRF7103TRPBF operates at 3A continuous drain current, compared to the NDS8936 specification of 5.3A. Applications requiring the full 5.3A current capacity cannot use this part. Additionally, the on-resistance is significantly higher (130mOhm versus 35mOhm), resulting in increased power dissipation. The elevated 50V voltage rating is suitable only for circuits designed to operate within this higher voltage margin.

Q: Are all substitute parts available in the same packaging?

A: Yes. The NDS8936, FDS6930B, and IRF7103TRPBF are all supplied in 8-SOIC (0.154", 3.90mm Width) surface mount packaging. PCB footprint compatibility is maintained across all three parts.

Q: What is the product status significance for long-term procurement?

A: The NDS8936 is classified as Obsolete, indicating discontinued manufacturing. The FDS6930B carries Last Time Buy status, signifying limited future availability. The IRF7103TRPBF maintains Active status, ensuring ongoing production and procurement availability. For new designs or long-term production requirements, the IRF7103TRPBF provides the most stable supply chain, subject to current rating compatibility.

Q: How do on-resistance differences affect circuit performance?

A: On-resistance (Rds On) directly impacts power dissipation and thermal generation. The NDS8936 and FDS6930B exhibit comparable on-resistance values (35mOhm and 38mOhm respectively), resulting in similar thermal characteristics. The IRF7103TRPBF on-resistance of 130mOhm is substantially higher, generating approximately 3.7 times greater power dissipation at equivalent current levels. Thermal management design must account for this difference if IRF7103TRPBF substitution is selected.

Q: Are there compliance or certification differences between substitute parts?

A: The FDS6930B and IRF7103TRPBF both carry ROHS3 compliance certification. The NDS8936 compliance status is not specified in available documentation. All three parts are REACH Unaffected and carry EAR99 ECCN classification. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements.