FDMC7664 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDMC7664 is an N-Channel 30V MOSFET manufactured by onsemi in the PowerTrench® series, rated for 18.8A continuous drain current (Ta) and 24A (Tc) in an 8-MLP surface mount package. This device is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production support.

The FDMC7664 serves in applications requiring moderate current switching at 30V with low on-resistance characteristics. Due to its obsolete status, equivalent parts from active product lines must be evaluated to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	18.8	A
Continuous Drain Current @ 25°C (Tc)	24	A
Rds On (Max) @ Id, Vgs	4.2 mOhm @ 18.8A, 10V	mOhm
Gate Threshold Voltage (Vgs(th)) @ Id	3	V @ 250µA
Gate Charge (Qg) @ Vgs	76	nC @ 10V
Input Capacitance (Ciss) @ Vds	4865	pF @ 15V
Power Dissipation (Ta)	2.3	W
Power Dissipation (Tc)	45	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount
Package	8-MLP (3.3x3.3)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FDMC7664 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain to Source Voltage (Vdss): Must equal or exceed 30V
Continuous Drain Current (Id @ 25°C): Must support minimum 18.8A (Ta) or 24A (Tc) rating
On-Resistance (Rds On): Must not significantly exceed 4.2 mOhm to maintain thermal performance
Gate Threshold Voltage (Vgs(th)): Must be compatible with 10V drive voltage
Maximum Gate Voltage (Vgs): Must support ±20V operation

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount only
Package Type: 8-pin configurations (8-MLP, 8-WDFN, 8-DFN-EP, 8-TSDSON, 8-VSONP, PowerDI3333-8)
Operating Temperature: Must support -55°C to 150°C range

Compliance Requirements:

RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 preferred
REACH Status: REACH Unaffected required

Substitute parts are grouped into two categories: Direct Electrical Equivalents (matching or exceeding all electrical specifications) and Functional Alternatives (meeting application requirements with acceptable parameter variations).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C Ta (A)	Id @ 25°C Tc (A)	Rds On Max (mOhm)	Vgs(th) @ 250µA (V)	Qg @ 10V (nC)	Ciss @ 15V (pF)	Package	Status
FDMC7664	onsemi	30	18.8	24	4.2	3.0	76	4865	8-MLP (3.3x3.3)	Obsolete
NTTFS4C06NTAG	onsemi	30	11	67	4.2	2.2	36	3366	8-WDFN (3.3x3.3)	Active
AON7530	Alpha & Omega Semiconductor	30	24	30	4.7	2.2	18.8	1320	8-DFN-EP (3x3)	Active
AON7534	Alpha & Omega Semiconductor	30	20	30	5.0	2.2	22	1037	8-DFN-EP (3x3)	Not For New Designs
BSZ035N03LSGATMA1	Infineon Technologies	30	20	40	3.5	2.2	56	4400	8-TSDSON (PG-TSDSON-8)	Active
BSZ050N03LSGATMA1	Infineon Technologies	30	16	40	5.0	2.2	35	2800	8-TSDSON (PG-TSDSON-8)	Active
BSZ050N03MSGATMA1	Infineon Technologies	30	15	40	4.5	2.0	46	3600	8-TSDSON (PG-TSDSON-8)	Active
CSD17577Q3AT	Texas Instruments	30	35	N/A	4.8	1.8	35	2310	8-VSONP (3x3.3)	Active
DMN3008SFG-13	Diodes Incorporated	30	17.6	N/A	4.6	2.3	86	3690	PowerDI3333-8	Active
DMN3008SFG-7	Diodes Incorporated	30	17.6	N/A	4.6	2.3	86	3690	PowerDI3333-8	Active

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

BSZ035N03LSGATMA1 (Infineon Technologies) is the preferred substitute for the FDMC7664. This part meets or exceeds all electrical specifications with 20A continuous drain current (Ta), superior on-resistance of 3.5 mOhm, and higher thermal capability (69W Tc). The device maintains full compliance with RoHS3 and REACH requirements, carries Active product status, and operates across the identical temperature range (-55°C to 150°C). The 8-TSDSON package provides equivalent thermal performance to the original 8-MLP package.

Secondary Recommendations:

AON7530 (Alpha & Omega Semiconductor) provides the closest current rating match at 24A (Ta), directly matching the FDMC7664 Tc specification. This part is Active and RoHS3 compliant with full REACH compliance. The 8-DFN-EP package offers superior thermal characteristics with lower input capacitance (1320 pF), beneficial for high-frequency switching applications.

DMN3008SFG-7 (Diodes Incorporated) serves as a functional alternative with 17.6A continuous drain current (Ta), closely approximating the original 18.8A specification. This part is Active with full compliance certifications and offers the advantage of high inventory availability (101,300 units). The PowerDI3333-8 package provides adequate thermal performance for moderate power applications.

Not Recommended for New Designs:

AON7534 carries a "Not For New Designs" status and should not be selected for new product development, despite meeting electrical requirements.

Conditional Substitutes:

NTTFS4C06NTAG (onsemi) offers lower gate charge (36 nC) and reduced input capacitance (3366 pF), making it suitable for applications prioritizing switching speed. However, the 11A (Ta) rating falls below the FDMC7664 specification and requires thermal analysis for the specific application.

CSD17577Q3AT (Texas Instruments) provides the highest current capability (35A Ta) and lowest gate threshold voltage (1.8V), suitable for applications requiring enhanced performance margins. This part is Active and fully compliant but operates in a different package footprint (8-VSONP).

Frequently Asked Questions (FAQ)

Q: Can the FDMC7664 be directly replaced with any of these substitutes without PCB modification?

A: Direct PCB replacement without modification is possible only with parts sharing identical or compatible package footprints. The FDMC7664 uses an 8-MLP (3.3x3.3) package. The NTTFS4C06NTAG uses an identical 8-WDFN (3.3x3.3) footprint and is pin-compatible. Other substitutes require PCB layout evaluation due to different package types (8-DFN-EP, 8-TSDSON, 8-VSONP, PowerDI3333-8), though most maintain similar pin assignments for standard MOSFET applications.

Q: What is the significance of the Rds On specification in selecting a substitute?

A: On-resistance (Rds On) directly determines power dissipation and thermal performance. The FDMC7664 specifies 4.2 mOhm at 18.8A, 10V. Substitutes with lower Rds On (such as BSZ035N03LSGATMA1 at 3.5 mOhm) reduce heat generation and improve efficiency. Substitutes with higher Rds On (such as AON7534 at 5.0 mOhm) increase power dissipation and may require thermal design review. Selection depends on the application's thermal budget and current profile.

Q: Why do some substitutes show different continuous drain current ratings for Ta versus Tc?

A: Continuous drain current ratings depend on measurement conditions. Ta (ambient temperature) represents current at 25°C ambient with natural convection cooling. Tc (case temperature) represents current with controlled case temperature, typically 25°C, simulating enhanced cooling. The FDMC7664 rates 18.8A (Ta) and 24A (Tc). Substitutes with higher Tc ratings indicate superior thermal performance under forced cooling or on thermally managed PCBs. Application thermal conditions determine which rating applies.

Q: Is the gate threshold voltage (Vgs(th)) difference between the FDMC7664 (3.0V) and substitutes (2.0-2.2V) significant?

A: The FDMC7664 specifies Vgs(th) at 3.0V, while most substitutes range from 2.0V to 2.2V. This difference affects gate drive requirements and switching behavior. Lower threshold voltages enable operation with lower gate drive voltages, potentially improving efficiency in battery-powered applications. However, this requires verification that the application's gate driver can reliably operate across the specified Vgs range. For standard 10V gate drive applications, this difference is not critical.

Q: What does "Not For New Designs" status mean for the AON7534?

A: "Not For New Designs" indicates that while the part remains available and functional, the manufacturer recommends against using it in new product development. This typically signals that the manufacturer intends to discontinue the product or has released superior alternatives. For existing designs already using AON7534, continued supply is generally available. For new designs, BSZ035N03LSGATMA1 or AON7530 are preferred alternatives.

Q: How does package type affect thermal performance?

A: Package type significantly impacts thermal performance through different thermal resistance characteristics. The FDMC7664 uses 8-MLP with 45W (Tc) dissipation capability. Substitutes in 8-TSDSON packages (BSZ035N03LSGATMA1, BSZ050N03LSGATMA1) achieve 69W and 50W (Tc) respectively, indicating superior thermal performance. The 8-DFN-EP packages (AON7530, AON7534) provide 24W and 23W (Tc). PowerDI3333-8 packages (DMN3008SFG series) are optimized for compact layouts. Package selection must align with application thermal requirements and PCB layout constraints.

Q: Are all listed substitutes RoHS3 compliant and REACH unaffected?

A: Yes. All substitute parts listed carry RoHS3 Compliance and REACH Unaffected status, matching the FDMC7664 environmental compliance profile. All parts maintain Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: What is the practical difference between DMN3008SFG-13 and DMN3008SFG-7?

A: Both parts are electrically and mechanically identical, with identical electrical specifications (17.6A, 4.6 mOhm, 86 nC gate charge). The suffix designations (-13 and -7) typically indicate different manufacturing dates or tape reel configurations. DMN3008SFG-7 shows significantly higher inventory availability (101,300 units versus 2,900 units), making it the preferred choice for production applications requiring reliable supply.

Q: Can the NTTFS4C06NTAG substitute for the FDMC7664 despite lower current rating?

A: The NTTFS4C06NTAG rates 11A (Ta), which is 37% below the FDMC7664's 18.8A specification. This part is suitable only for applications where the actual operating current does not exceed 11A. The advantage lies in superior switching characteristics (36 nC gate charge versus 76 nC, and 3366 pF input capacitance versus 4865 pF), making it beneficial for high-frequency switching applications operating below 11A. Thermal analysis is required to confirm suitability for the specific application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message