NDS9959 Equivalent & Substitute Parts

Part Overview

The NDS9959 is a dual N-channel MOSFET array manufactured by onsemi, designed for surface mount applications in 8-SOIC packaging. This device features a 50V drain-to-source voltage rating with 2A continuous drain current capability and 900mW maximum power dissipation. The NDS9959 is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

NDS9959

onsemiIn Stock: 17669NDS9959 Datasheet

Current PartRFQ

ZXMN6A11DN8TA

Diodes IncorporatedIn Stock: 15779ZXMN6A11DN8TA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NDS9959 is based on the following critical parameters that must be met or exceeded by alternative components:

Mandatory Compatibility Criteria:

• Configuration: Dual N-channel MOSFET array
• Package: 8-SOIC surface mount form factor with 0.154" (3.90mm) width
• Drain-to-Source Voltage (Vdss): Minimum 50V rating
• Continuous Drain Current (Id): Minimum 2A at 25°C
• Power Dissipation: Minimum 900mW capability
• Operating Temperature Range: -55°C to 150°C (TJ)

The ZXMN6A11DN8TA from Diodes Incorporated meets these criteria with enhanced electrical performance characteristics, including higher voltage rating (60V), increased current capability (2.5A), and improved on-resistance (120mOhm versus 300mOhm).

Parameter Comparison

Engineering Selection Recommendations

The ZXMN6A11DN8TA is a direct functional substitute for the NDS9959 based on the following engineering criteria:

Electrical Compatibility: The substitute part exceeds all minimum electrical requirements of the original device. The 60V Vdss rating provides 20% margin above the 50V specification, the 2.5A continuous drain current exceeds the 2A requirement, and the 1.8W power rating doubles the 900mW capability of the NDS9959.

Package Compatibility: Both devices utilize identical 8-SOIC surface mount packaging with 0.154" (3.90mm) width, ensuring direct PCB layout compatibility without redesign.

Temperature Range: Both devices operate across the identical -55°C to 150°C junction temperature range, maintaining thermal performance specifications.

Product Status and Compliance: The ZXMN6A11DN8TA is classified as active product status, ensuring ongoing availability and manufacturing support. The substitute part carries ROHS3 compliance certification, whereas the NDS9959 does not specify RoHS status. Both devices are REACH unaffected and carry EAR99 ECCN classification.

Moisture Sensitivity: Both components share MSL 1 (Unlimited) rating, indicating identical moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the ZXMN6A11DN8TA directly replace the NDS9959 without PCB modifications?

A: Yes. Both devices share identical 8-SOIC packaging dimensions (0.154" width, 3.90mm), enabling direct pin-for-pin substitution on existing PCB layouts without physical redesign.

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

A: The ZXMN6A11DN8TA provides superior electrical performance across three primary metrics: 60V Vdss (versus 50V), 2.5A continuous drain current (versus 2A), and 120mOhm on-resistance (versus 300mOhm). These enhancements result in lower power dissipation and improved thermal performance in equivalent circuit applications.

Q: Why is the NDS9959 classified as obsolete?

A: The NDS9959 is no longer in active production by onsemi. The ZXMN6A11DN8TA from Diodes Incorporated represents the current active alternative for dual N-channel MOSFET array applications in this voltage and current class.

Q: Are there any compliance differences between the two parts?

A: The ZXMN6A11DN8TA carries explicit ROHS3 compliance certification. Both devices are REACH unaffected and share identical EAR99 ECCN classification. Both maintain MSL 1 (Unlimited) moisture sensitivity level.

Q: What is the gate charge difference, and does it affect circuit performance?

A: The NDS9959 specifies 15nC gate charge at 10V, while the ZXMN6A11DN8TA specifies 5.7nC at 10V. Lower gate charge in the substitute part results in faster switching transitions and reduced gate drive power requirements, providing improved efficiency in switching applications.

Q: Can the ZXMN6A11DN8TA be used in applications originally designed for the NDS9959?

A: Yes. The substitute part meets or exceeds all electrical specifications of the original device across voltage, current, power dissipation, and temperature range parameters. The enhanced performance characteristics of the ZXMN6A11DN8TA provide additional design margin in existing applications.