FDMA510PZ P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDMA510PZ is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 7.8A continuous drain current at 25°C. This device is packaged in a 6-MicroFET (2x2) surface mount configuration and is part of the PowerTrench® series. The FDMA510PZ carries a Last Time Buy product status, indicating that the manufacturer has discontinued this part and will no longer accept new orders after a specified date. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

FDMA510PZ

onsemiIn Stock: 15767FDMA510PZ Datasheet

Current PartRFQ

NTLUS3A18PZTAG

onsemiIn Stock: 43140NTLUS3A18PZTAG Datasheet

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NTLUS3A40PZTAG

onsemiIn Stock: 20287NTLUS3A40PZTAG Datasheet

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DMP2039UFDE-7

Diodes IncorporatedIn Stock: 10036DMP2039UFDE-7 Datasheet

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PMPB29XPE,115

Nexperia USA Inc.In Stock: 15330PMPB29XPE,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDMA510PZ is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Drain-to-Source Voltage (Vdss) must be equal to or greater than 20V
• Continuous Drain Current (Id) must support the application's current requirements
• On-Resistance (Rds On) characteristics must be compatible with circuit performance
• Gate Threshold Voltage (Vgs(th)) must fall within acceptable switching thresholds
• Gate Charge (Qg) and Input Capacitance (Ciss) affect switching speed and driver requirements
• Maximum Gate Voltage (Vgs Max) must accommodate the gate drive circuit

Mechanical Compatibility Criteria:

• Surface mount package type (6-pin DFN/UDFN variants acceptable)
• Exposed pad configuration for thermal management
• Operating temperature range must encompass -55°C to 150°C (TJ)

Compliance Requirements:

• RoHS3 compliance mandatory
• Moisture Sensitivity Level (MSL) of 1 (Unlimited) preferred
• REACH Unaffected status required

The substitute parts listed below meet these criteria with variations in current rating, on-resistance, and power dissipation characteristics that allow functional replacement in appropriate circuit configurations.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

The DMP2039UFDE-7 (Diodes Incorporated) and PMPB29XPE,115 (Nexperia USA Inc.) are the recommended substitutes for new designs and long-term supply continuity. Both devices carry Active product status, ensuring ongoing availability and manufacturer support. The DMP2039UFDE-7 provides the closest electrical match with 6.7A continuous drain current and 27 mOhm on-resistance, exceeding the FDMA510PZ performance envelope. The PMPB29XPE,115 offers enhanced thermal performance with dual power dissipation ratings (1.7W Ta / 12.5W Tc) and higher gate voltage tolerance (±12V), providing design flexibility for applications requiring increased thermal management capability.

Secondary Substitutes (Obsolete Product Status):

The NTLUS3A18PZTAG and NTLUS3A40PZTAG (both onsemi µCool™ series) are classified as Obsolete and should be considered only for existing inventory management or short-term bridge solutions. These parts maintain electrical compatibility with the FDMA510PZ but carry reduced continuous drain current ratings (5.1A and 4A respectively) and lower power dissipation (0.7W Ta). Procurement of these devices for new applications is not recommended due to discontinued manufacturing status.

Compliance Verification:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment with the original FDMA510PZ. Operating temperature ranges across all candidates span -55°C to 150°C (TJ), supporting identical thermal operating envelopes.

Frequently Asked Questions (FAQ)

Q: Can the NTLUS3A18PZTAG directly replace the FDMA510PZ in existing designs?

A: The NTLUS3A18PZTAG shares the same 20V Vdss rating and compatible gate threshold voltage (1V vs. 1.5V), but the continuous drain current is reduced from 7.8A to 5.1A. Direct substitution is possible only in applications where the circuit current demand does not exceed 5.1A. The on-resistance is superior (18 mOhm vs. 30 mOhm), but power dissipation capability is significantly lower (0.7W vs. 2.4W). This part is Obsolete and not recommended for new designs.

Q: What are the key differences between the DMP2039UFDE-7 and the FDMA510PZ?

A: The DMP2039UFDE-7 exceeds the FDMA510PZ in drain-to-source voltage (25V vs. 20V) and continuous drain current (6.7A vs. 7.8A). On-resistance is comparable (27 mOhm vs. 30 mOhm). The primary difference is the package variant (6-PowerUDFN vs. 6-WDFN), which may require PCB layout verification. Gate charge is higher (48.7 nC @ 8V vs. 27 nC @ 4.5V), potentially affecting switching speed in high-frequency applications. The DMP2039UFDE-7 carries Active product status and is suitable for new designs.

Q: Is the PMPB29XPE,115 suitable for high-power applications?

A: The PMPB29XPE,115 provides dual power dissipation ratings (1.7W Ta / 12.5W Tc), indicating enhanced thermal performance when mounted on a PCB with adequate copper area for heat dissipation to the case temperature (Tc). This characteristic makes it suitable for applications requiring sustained power dissipation beyond the FDMA510PZ capability (2.4W Ta). The continuous drain current is 5A, which is lower than the FDMA510PZ (7.8A), so current capacity must be verified for the target application.

Q: Are there package compatibility concerns when substituting these parts?

A: All substitute parts use 6-pin DFN/UDFN surface mount packages with exposed pads, which are mechanically compatible with standard PCB footprints. However, the FDMA510PZ uses a 6-WDFN package while most substitutes use 6-UDFN or 6-PowerUDFN variants. Although pin configurations are identical, PCB layout verification is required to confirm pad dimensions and thermal via placement align with the selected substitute part's package specification.

Q: Which substitute part is recommended for new product development?

A: The DMP2039UFDE-7 is the primary recommendation for new designs due to its Active product status, superior electrical performance (6.7A continuous drain current, 27 mOhm on-resistance), and higher drain-to-source voltage rating (25V). The PMPB29XPE,115 is an alternative for applications requiring enhanced thermal management (12.5W Tc rating). Both parts are RoHS3 compliant and carry MSL Level 1 (Unlimited) classification.

Q: What is the impact of higher gate charge on circuit performance?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The FDMA510PZ has 27 nC @ 4.5V, while the DMP2039UFDE-7 has 48.7 nC @ 8V. Higher gate charge increases switching time and driver power consumption. In low-frequency applications (< 100 kHz), this difference is negligible. In high-frequency switching applications (> 1 MHz), the increased gate charge may require a more robust gate driver to maintain switching performance.

Q: Can the NTLUS3A40PZTAG be used in applications requiring 7.8A continuous current?

A: No. The NTLUS3A40PZTAG is rated for 4A continuous drain current at 25°C, which is insufficient for applications requiring 7.8A. Operating this device above its rated current will result in excessive junction temperature rise and potential thermal runaway. This part is suitable only for applications with current demands of 4A or less.