NDS8434 Equivalent & Substitute Parts

Part Overview

The NDS8434 is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 6.5A continuous drain current at 25°C. The device is housed in an 8-SOIC surface mount package and is designed for general-purpose switching and amplification applications requiring moderate current handling in compact form factors.

The NDS8434 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

NDS8434

onsemiIn Stock: 4113NDS8434 Datasheet

Current PartRFQ

FDS6375

onsemiIn Stock: 80400FDS6375 Datasheet

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IRF7404TRPBF

Infineon TechnologiesIn Stock: 37250IRF7404TRPBF Datasheet

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DMP2038USS-13

Diodes IncorporatedIn Stock: 28045DMP2038USS-13 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the NDS8434 are selected based on electrical and mechanical compatibility within the following criteria:

Electrical Compatibility Requirements:

• Drain-to-source voltage (Vdss) equal to or greater than 20V
• Continuous drain current (Id) at or above 6.5A at 25°C
• Maximum on-state resistance (Rds On) at rated current and gate voltage compatible with circuit design
• Power dissipation capability of 2.5W or greater
• Operating temperature range encompassing -55°C to 150°C minimum

Mechanical Compatibility Requirements:

• Surface mount package type (8-SOIC or 8-SO equivalent)
• Pin configuration and footprint compatibility with 8-SOIC standard

Regulatory and Compliance Requirements:

• RoHS3 compliance
• Moisture sensitivity level MSL 1 (Unlimited)

The following substitute parts meet these criteria and are presented in order of electrical and operational alignment with the NDS8434.

Parameter Comparison

Engineering Selection Recommendations

FDS6375 (onsemi)

The FDS6375 is the primary substitute for the NDS8434. Both devices are manufactured by onsemi and share identical voltage and power dissipation ratings. The FDS6375 provides superior electrical performance with 8A continuous drain current (versus 6.5A) and lower on-state resistance (24 mOhm versus 35 mOhm). The FDS6375 carries Active product status with extended operating temperature range to 175°C, ensuring long-term supply availability and design longevity. Package compatibility is direct (8-SOIC). All regulatory certifications align with the NDS8434.

DMP2038USS-13 (Diodes Incorporated)

The DMP2038USS-13 provides electrical equivalence to the NDS8434 with matched 6.5A continuous drain current and 20V Vdss rating. This device is manufactured by Diodes Incorporated and carries Active product status. On-state resistance is 38 mOhm at 5A and 4.5V gate voltage, within acceptable tolerance of the NDS8434 specification. Operating temperature range and all regulatory certifications are equivalent. Package type is 8-SO, which is mechanically compatible with 8-SOIC footprints. Inventory availability is substantial.

IRF7404TRPBF (Infineon Technologies)

The IRF7404TRPBF is manufactured by Infineon Technologies under the HEXFET® product line. It meets the 20V Vdss and 2.5W power dissipation requirements with 6.7A continuous drain current. The device carries Last Time Buy product status, indicating limited future availability. Operating temperature range matches the NDS8434 (-55°C to 150°C). On-state resistance specification (40 mOhm at 3.2A, 4.5V) is measured at lower current than the NDS8434 reference point, requiring circuit-level verification for direct substitution. Package type is 8-SO, compatible with 8-SOIC footprints.

Frequently Asked Questions (FAQ)

Q: Can the FDS6375 directly replace the NDS8434 in existing designs?

A: Yes. The FDS6375 meets or exceeds all electrical parameters of the NDS8434 (20V Vdss, 2.5W power dissipation, -55°C to 150°C operating range) and shares the same 8-SOIC package footprint. The higher current rating (8A versus 6.5A) and lower on-state resistance (24 mOhm versus 35 mOhm) provide improved performance margins. Active product status ensures supply continuity.

Q: What is the difference between 8-SOIC and 8-SO packages?

A: Both 8-SOIC and 8-SO are surface mount packages with eight pins in a 0.154-inch (3.90mm) width configuration. The packages are mechanically and electrically compatible for PCB footprint purposes. Pin assignments and lead spacing conform to the same standard, allowing direct substitution at the board level.

Q: Why does the IRF7404TRPBF show different Rds On specifications?

A: The IRF7404TRPBF specifies on-state resistance at 3.2A and 4.5V gate voltage, whereas the NDS8434 is specified at 6.5A and 4.5V. On-state resistance varies with drain current; lower current measurements typically yield lower resistance values. Circuit-level analysis is required to confirm suitability for applications requiring the full 6.5A current rating.

Q: Is the DMP2038USS-13 packaging different from the NDS8434?

A: The DMP2038USS-13 is supplied in Tape & Reel (TR) packaging, whereas the NDS8434 is available in Cut Tape (CT) and Digi-Reel® formats. The device package type is 8-SO, which is mechanically compatible with 8-SOIC footprints. Packaging format does not affect electrical performance or PCB assembly compatibility.

Q: What is the significance of the FDS6375 extended temperature range to 175°C?

A: The FDS6375 operating temperature range extends to 175°C (versus 150°C for the NDS8434), providing additional thermal margin in high-temperature applications. This specification does not restrict use in applications requiring only -55°C to 150°C operation; it indicates enhanced capability for more demanding thermal environments.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The FDS6375, IRF7404TRPBF, and DMP2038USS-13 all carry RoHS3 compliance certification, matching the NDS8434. All devices are also REACH Unaffected and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Why is the NDS8434 marked as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production and will not accept new orders. Substitute parts with Active or Last Time Buy status provide design continuity and ensure future availability for production requirements.