AON7244 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The AON7244 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 60V drain-to-source voltage with continuous drain current of 20A at Ta and 50A at Tc. The device is housed in an 8-DFN-EP (3.3x3.3) surface mount package and is designed for general-purpose switching and amplification applications in power management circuits.

The AON7244 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this MOSFET.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	60	V
Continuous Drain Current @ 25°C (Ta)	20	A
Continuous Drain Current @ 25°C (Tc)	50	A
On-Resistance (Rds On) @ 20A, 10V	8.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.5	V
Gate Charge (Qg) @ 10V	32	nC
Input Capacitance (Ciss) @ 30V	2435	pF
Power Dissipation (Ta)	6.2	W
Power Dissipation (Tc)	83	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-DFN-EP (3.3x3.3)	Surface Mount
Gate Voltage (Vgs) Maximum	±20	V

Substitute Part Grouping Explanation

Substitution of the AON7244 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss) must equal or exceed 60V
Continuous drain current ratings must support the application's current requirements
On-resistance (Rds On) characteristics must be compatible with power dissipation budgets
Gate threshold voltage (Vgs(th)) must fall within acceptable switching margins
Gate charge (Qg) and input capacitance (Ciss) must be compatible with gate drive circuits
Operating temperature range must encompass the application's thermal environment

Mechanical Compatibility Criteria:

Surface mount package type must be compatible with PCB layout and assembly processes
Package footprint dimensions must accommodate existing board designs or allow minor layout modifications
Moisture sensitivity level (MSL) must meet storage and handling requirements

The substitute parts listed below satisfy these criteria within the allowed parameter ranges for this MOSFET category.

Parameter Comparison

Parameter	AON7244	AON7262E	FDMC86520L	NVTFS5C673NLTAG	NVTFS5C673NLWFTAG
Manufacturer	Alpha & Omega	Alpha & Omega	onsemi	onsemi	onsemi
Vdss (V)	60	60	60	60	60
Id @ Ta (A)	20	21	13.5	13	13
Id @ Tc (A)	50	34	22	50	50
Rds On @ 10V (mOhm)	8.5 @ 20A	6.2 @ 20A	7.9 @ 13.5A	9.8 @ 25A	9.8 @ 25A
Vgs(th) @ 250µA (V)	2.5	2.2	3.0	2.0	2.0
Qg @ 10V (nC)	32	45	64	9.5	9.5
Ciss @ 30V (pF)	2435	1650	4550	880	880
Power Dissipation Ta (W)	6.2	5	2.3	3.1	3.1
Power Dissipation Tc (W)	83	43	40	46	46
Operating Temperature (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 175	-55 to 175
Package	8-DFN-EP (3.3x3.3)	8-DFN-EP (3x3)	8-MLP (3.3x3.3)	8-WDFN (3.3x3.3)	8-WDFN (3.3x3.3)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AON7262E (Alpha & Omega Semiconductor Inc.)

The AON7262E is an active product with ROHS3 compliance and represents the closest electrical equivalent to the AON7244 within the Alpha & Omega product family. It maintains the same 60V Vdss rating and comparable continuous drain current specifications (21A Ta, 34A Tc). The AON7262E exhibits improved on-resistance (6.2 mOhm vs. 8.5 mOhm) and lower input capacitance (1650 pF vs. 2435 pF), resulting in reduced power dissipation and improved switching efficiency. The package footprint differs slightly (3x3 vs. 3.3x3.3), requiring PCB layout verification. This part is recommended for applications where Alpha & Omega device continuity is preferred and thermal performance improvements are acceptable.

NVTFS5C673NLWFTAG and NVTFS5C673NLTAG (onsemi)

Both onsemi NVTFS5C673 variants are active products with ROHS3 compliance and AEC-Q101 automotive qualification. These devices maintain the 60V Vdss rating and deliver the highest continuous drain current at Tc (50A), matching the AON7244's Tc specification. The NVTFS5C673 series exhibits significantly lower gate charge (9.5 nC vs. 32 nC) and input capacitance (880 pF vs. 2435 pF), enabling faster switching and reduced gate drive power requirements. The extended operating temperature range (-55°C to 175°C vs. -55°C to 150°C) provides additional thermal margin. The NVTFS5C673NLWFTAG is available in Cut Tape & Digi-Reel packaging with substantially higher inventory (1,000,100 pcs), while the NVTFS5C673NLTAG is supplied in Tape & Reel format. Both are suitable for direct substitution in applications requiring improved switching performance and automotive-grade reliability.

FDMC86520L (onsemi)

The FDMC86520L is an active product with ROHS3 compliance and represents a lower-current alternative rated for 13.5A Ta and 22A Tc. This device is suitable only for applications where the reduced current ratings are acceptable. The FDMC86520L exhibits comparable on-resistance (7.9 mOhm) and operates within the same temperature range. The package type (8-MLP) differs from the AON7244 (8-DFN-EP), requiring PCB layout modification. This part is recommended only when current requirements do not exceed 13.5A continuous at Ta.

Frequently Asked Questions (FAQ)

Q: Can the AON7262E directly replace the AON7244 without PCB modifications?

A: The AON7262E uses an 8-DFN-EP package with 3x3 mm dimensions, compared to the AON7244's 3.3x3.3 mm package. While both are DFN packages, the footprint difference requires verification of PCB layout compatibility. Consult the respective datasheets for exact pin spacing and land pattern specifications before confirming direct substitution.

Q: What are the advantages of the NVTFS5C673 series over the AON7244?

A: The NVTFS5C673 series offers significantly lower gate charge (9.5 nC vs. 32 nC) and input capacitance (880 pF vs. 2435 pF), resulting in faster switching transitions and reduced gate drive power consumption. The extended operating temperature range (-55°C to 175°C) and AEC-Q101 automotive qualification provide additional design margin and reliability assurance. Both variants maintain the 60V Vdss rating and deliver 50A continuous drain current at Tc, matching the AON7244's thermal performance specification.

Q: Are the NVTFS5C673NLWFTAG and NVTFS5C673NLTAG electrically identical?

A: Yes, both variants are electrically identical. The difference lies in packaging format: NVTFS5C673NLWFTAG is supplied in Cut Tape & Digi-Reel format with significantly higher inventory availability (1,000,100 pcs), while NVTFS5C673NLTAG is supplied in Tape & Reel format with lower inventory (3,545 pcs). Select based on procurement and assembly process requirements.

Q: Is the FDMC86520L suitable for all AON7244 applications?

A: The FDMC86520L is suitable only for applications where continuous drain current does not exceed 13.5A at Ta or 22A at Tc. The AON7244 is rated for 20A Ta and 50A Tc, so the FDMC86520L cannot support higher-current designs. Additionally, the 8-MLP package differs from the AON7244's 8-DFN-EP package, requiring PCB layout modification. Verify current requirements before selecting this substitute.

Q: What is the significance of the MSL rating for these MOSFETs?

A: All listed parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture absorption concerns. This classification simplifies storage, handling, and procurement logistics compared to higher MSL ratings that require controlled humidity environments and limited storage periods.

Q: Do all substitute parts meet ROHS3 compliance?

A: The AON7262E, FDMC86520L, NVTFS5C673NLTAG, and NVTFS5C673NLWFTAG are all ROHS3 compliant. The original AON7244 does not specify RoHS status. If RoHS compliance is a design requirement, all listed substitutes satisfy this criterion.

Q: Which substitute offers the best thermal performance?

A: The NVTFS5C673 variants (both NLWFTAG and NLTAG) deliver the highest continuous drain current at Tc (50A), matching the AON7244's Tc specification of 50A. This enables equivalent thermal performance in applications utilizing case temperature ratings. The AON7262E provides improved Ta performance (21A vs. 20A) with lower power dissipation (5W Ta vs. 6.2W Ta), making it suitable for ambient temperature-limited designs.

Q: Can these MOSFETs be used interchangeably in existing designs?

A: Electrical interchangeability depends on application-specific current, voltage, and thermal requirements. Mechanical interchangeability requires package footprint compatibility verification. The NVTFS5C673 variants maintain identical 8-WDFN (3.3x3.3) package dimensions to the AON7244's 8-DFN-EP (3.3x3.3) package, simplifying PCB layout compatibility. The AON7262E (8-DFN-EP 3x3) and FDMC86520L (8-MLP 3.3x3.3) require layout verification. Consult application schematics and thermal analysis before confirming substitution.

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