FDMA7628 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDMA7628 is an N-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 9.4A continuous drain current. This device features the PowerTrench® series technology in a 6-MicroFET (2x2) surface mount package. The FDMA7628 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal characteristics while accommodating available packaging options.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	20	V
Continuous Drain Current (Id) @ 25°C	9.4	A
On-State Resistance (Rds On Max) @ 9.4A, 4.5V	14.5	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	1	V
Gate Charge (Qg Max) @ 4.5V	17.5	nC
Power Dissipation (Max)	1.9	W
Operating Temperature Range	-55 to 150	°C
Package Type	6-WDFN Exposed Pad	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution eligibility for the FDMA7628 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss): Must equal or exceed 20V
Continuous Drain Current (Id): Must support minimum 9.4A at 25°C
On-State Resistance (Rds On): Lower or equivalent values ensure thermal performance
Gate Threshold Voltage (Vgs(th)): Must remain within ±8V maximum gate voltage specification
Operating Temperature Range: Must span -55°C to 150°C

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount only
Package Family: 6-pin DFN/WDFN variants with exposed pad
Footprint Compatibility: 2x2mm form factor packages

Compliance & Status:

Product Status: Active status preferred for long-term availability
RoHS/REACH Compliance: Maintained across substitutes
Moisture Sensitivity Level: MSL 1 (Unlimited) maintained

The three substitute parts listed below satisfy these criteria with variations in on-state resistance, gate charge, and power dissipation characteristics.

Parameter Comparison

Parameter	FDMA7628	FDMA410NZ	AON2406	PMPB10XNE,115
Manufacturer	onsemi	onsemi	Alpha & Omega Semiconductor Inc.	Nexperia USA Inc.
Vdss (V)	20	20	20	20
Id @ 25°C (A)	9.4	9.5	8	9
Rds On Max @ Id, 4.5V (mOhm)	14.5	23	12.5	14
Vgs(th) Max @ 250µA (V)	1	1	1	0.9
Qg Max @ 4.5V (nC)	17.5	14	18	34
Ciss Max @ 10V (pF)	1680	1080	1140	2175
Power Dissipation Max (W)	1.9	2.4	2.8	1.7 (Ta) / 12.5 (Tc)
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	6-WDFN Exposed Pad	6-WDFN Exposed Pad	6-UDFN Exposed Pad	6-UDFN Exposed Pad
Product Status	Obsolete	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

FDMA410NZ (onsemi)

The FDMA410NZ is an active-status onsemi product within the same PowerTrench® series, maintaining manufacturer continuity. It provides 9.5A continuous drain current, exceeding the FDMA7628 specification by 0.1A. The device uses identical 6-WDFN packaging and gate voltage specifications. On-state resistance increases to 23mOhm compared to 14.5mOhm, resulting in higher power dissipation (2.4W vs. 1.9W). Gate charge reduces to 14nC, improving switching speed. This substitute is suitable for applications where the higher Rds On is acceptable and active product status is required for long-term supply assurance.

AON2406 (Alpha & Omega Semiconductor Inc.)

The AON2406 is an active-status device offering the lowest on-state resistance at 12.5mOhm, providing superior thermal performance compared to the FDMA7628. Continuous drain current is rated at 8A, which is 1.4A below the original specification. The 6-UDFN package maintains 2x2mm footprint compatibility with exposed pad configuration. Gate charge is 18nC, comparable to the FDMA7628. Power dissipation reaches 2.8W. This substitute is applicable in designs where thermal efficiency is prioritized and the 8A current rating is sufficient for the application.

PMPB10XNE,115 (Nexperia USA Inc.)

The PMPB10XNE,115 is an active-status Nexperia device rated for 9A continuous drain current. It features the lowest power dissipation at 1.7W (Ta) with extended thermal capability at 12.5W (Tc). On-state resistance is 14mOhm, closely matching the FDMA7628. Gate threshold voltage is 0.9V, slightly lower than the original 1V specification. Gate charge is significantly higher at 34nC, affecting switching characteristics. The DFN2020MD-6 package maintains 6-pin configuration with exposed pad. Maximum gate voltage rating extends to ±12V. This substitute provides thermal advantages and is suitable for applications with higher thermal dissipation requirements.

Frequently Asked Questions (FAQ)

Q: Can the FDMA410NZ directly replace the FDMA7628 in existing PCB layouts?

A: Yes. Both devices use the 6-WDFN Exposed Pad package with identical 2x2mm footprint and pin configuration. PCB layout modifications are not required. However, thermal design should account for the increased Rds On (23mOhm vs. 14.5mOhm), which generates additional heat at equivalent current levels.

Q: What is the primary difference between the AON2406 and FDMA7628?

A: The AON2406 has lower on-state resistance (12.5mOhm vs. 14.5mOhm) but reduced continuous drain current rating (8A vs. 9.4A). The AON2406 uses a 6-UDFN package instead of 6-WDFN, though both maintain 2x2mm dimensions. Footprint compatibility requires verification of pin-to-pad spacing in the specific PCB design.

Q: Why does the PMPB10XNE,115 have higher gate charge than the FDMA7628?

A: Gate charge (Qg) of 34nC versus 17.5nC reflects differences in internal capacitance and switching characteristics. Higher gate charge increases driver current requirements and switching losses. This parameter must be evaluated against the driver circuit specifications in the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The FDMA410NZ, AON2406, and PMPB10XNE,115 are all ROHS3 Compliant. The original FDMA7628 does not specify RoHS status. All parts maintain REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute offers the best thermal performance?

A: The PMPB10XNE,115 provides the lowest power dissipation at 1.7W (Ta) and extends to 12.5W (Tc), indicating superior thermal capability under case temperature measurement. The AON2406 offers the lowest on-state resistance at 12.5mOhm, minimizing resistive heating at equivalent current levels.

Q: Can I use the AON2406 if my application requires 9.4A continuous current?

A: No. The AON2406 is rated for 8A continuous drain current, which is 1.4A below the FDMA7628 specification. Using this device in an application requiring 9.4A would exceed its rated current capacity and compromise reliability.

Q: What is the impact of different package types (6-WDFN vs. 6-UDFN) on substitution?

A: Both 6-WDFN and 6-UDFN packages maintain 2x2mm form factors with exposed pad configurations. Pin assignments and footprint dimensions are compatible for direct PCB substitution. Verify specific pad dimensions and thermal via requirements in the PCB design to ensure optimal thermal performance.

Q: Is the FDMA410NZ the recommended substitute for new designs?

A: The FDMA410NZ is suitable for designs requiring active product status and manufacturer continuity within the onsemi PowerTrench® series. However, substitute selection depends on specific application requirements for current rating, thermal dissipation, and switching characteristics. All three active-status substitutes meet the core electrical specifications of the obsolete FDMA7628.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message