NTMFS4923NET3G N-Channel 30V MOSFET Equivalent & Substitute Parts

Part Overview

The NTMFS4923NET3G is an N-Channel 30V MOSFET manufactured by onsemi, rated for 12.7A continuous drain current at 25°C ambient temperature and 91A at case temperature. The device is housed in a 5-DFN (5x6) surface mount package with 8-SOFL configuration. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The substitute parts listed maintain electrical compatibility within the 30V drain-source voltage class while offering improved performance characteristics and active product status from Texas Instruments NexFET™ series.

Key Parameters

Parameter	NTMFS4923NET3G	Unit
Manufacturer	onsemi	—
FET Type	N-Channel	—
Drain-Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	12.7	A
Continuous Drain Current @ Case (Tc)	91	A
Rds(on) Max @ 30A, 10V	3.3	mOhm
Gate Threshold Voltage @ 250µA	2	V
Gate Charge @ 4.5V	22	nC
Input Capacitance @ 15V	4850	pF
Power Dissipation (Ta)	930	mW
Power Dissipation (Tc)	48	W
Operating Temperature Range	-40 to 150	°C
Package Type	5-DFN (5x6)	—
Product Status	Obsolete	—
Moisture Sensitivity Level	3	—

Substitute Part Grouping Explanation

Substitution eligibility for the NTMFS4923NET3G is determined by the following critical parameters:

Primary Compatibility Criteria:

Drain-Source Voltage (Vdss): 30V (exact match required)
FET Type: N-Channel (exact match required)
Technology: MOSFET Metal Oxide (exact match required)
Mounting Type: Surface Mount (exact match required)
Package Family: 5x6mm footprint (mechanical compatibility)

Performance Equivalence Criteria:

Continuous drain current capability at or above 12.7A @ 25°C ambient
Rds(on) characteristics suitable for the application thermal environment
Gate charge and input capacitance within acceptable switching performance range
Operating temperature range encompassing -40°C to 150°C

All four substitute parts (CSD17301Q5A, CSD17305Q5A, CSD17306Q5A, CSD17501Q5A) from Texas Instruments meet these criteria. They maintain 30V Vdss rating, N-Channel configuration, and surface mount 8-VSONP (5x6) packaging. Each substitute offers enhanced drain current ratings and improved Rds(on) characteristics compared to the obsolete NTMFS4923NET3G, with active product status and superior compliance certifications.

Parameter Comparison

Parameter	NTMFS4923NET3G	CSD17301Q5A	CSD17305Q5A	CSD17306Q5A	CSD17501Q5A	Unit
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	—
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	—
Vdss	30	30	30	30	30	V
Id @ 25°C (Ta)	12.7	28	29	24	—	A
Id @ Case (Tc)	91	100	100	100	100	A
Rds(on) Max	3.3 @ 30A, 10V	2.6 @ 25A, 8V	3.4 @ 30A, 8V	3.7 @ 22A, 8V	2.9 @ 25A, 10V	mOhm
Vgs(th) Max @ 250µA	2	1.55	1.6	1.6	1.8	V
Gate Charge @ 4.5V	22	25	18.3	15.3	17	nC
Ciss @ 15V	4850	3480	2600	2170	2630	pF
Power Dissipation (Ta)	930	3200	3100	3200	3200	mW
Operating Temp Range	-40 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	°C
Package	5-DFN (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	—
Product Status	Obsolete	Active	Active	Active	Active	—
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—
MSL	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

Product Status Consideration: The NTMFS4923NET3G is classified as obsolete. All four substitute parts from Texas Instruments NexFET™ series maintain active product status, ensuring long-term availability, continued manufacturing support, and access to technical documentation.

Compliance and Certification: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The NTMFS4923NET3G lacks documented RoHS compliance status. Substitute parts carry Moisture Sensitivity Level 1 (unlimited shelf life) compared to the original part's MSL 3 (168-hour limitation), reducing handling and storage constraints.

Electrical Compatibility: All substitutes maintain the 30V Vdss rating and N-Channel configuration required for direct functional replacement. The substitute parts demonstrate improved or equivalent Rds(on) characteristics and lower gate charge, providing enhanced switching efficiency. Operating temperature ranges of -55°C to 150°C in substitute parts exceed the original -40°C to 150°C specification.

Selection by Application Current Requirements:

CSD17501Q5A: Highest current capability (100A Tc), lowest Rds(on) at 10V drive (2.9 mOhm), symmetric gate voltage rating (±20V). Optimal for high-current switching applications.
CSD17301Q5A: 28A continuous current, 2.6 mOhm Rds(on) at 8V drive. Suitable for moderate-to-high current applications with 3V minimum drive voltage.
CSD17305Q5A: 29A continuous current, 3.4 mOhm Rds(on) at 8V drive, lowest gate charge (18.3 nC). Recommended for switching frequency optimization.
CSD17306Q5A: 24A continuous current, 3.7 mOhm Rds(on) at 8V drive, lowest input capacitance (2170 pF). Suitable for applications prioritizing reduced parasitic capacitance.

Frequently Asked Questions (FAQ)

Q: Can CSD17301Q5A, CSD17305Q5A, CSD17306Q5A, or CSD17501Q5A be used as direct replacements for NTMFS4923NET3G?

A: Yes, all four parts are electrically compatible substitutes. They maintain the 30V Vdss rating, N-Channel configuration, and 5x6mm surface mount footprint. The 8-VSONP package pinout differs from the original 5-DFN, requiring PCB layout verification. All substitutes offer superior electrical performance and active product status.

Q: What is the primary difference between the four substitute parts?

A: The substitutes differ in continuous drain current ratings (24A to 29A @ 25°C ambient), Rds(on) characteristics at different gate drive voltages, gate charge values, and input capacitance. CSD17501Q5A provides the highest current capability (100A Tc) and lowest Rds(on) at 10V. CSD17306Q5A offers the lowest input capacitance. Selection depends on specific application requirements for current, switching frequency, and drive voltage.

Q: Are the package dimensions compatible between NTMFS4923NET3G and the substitute parts?

A: Both the original 5-DFN (5x6) and substitute 8-VSONP (5x6) packages share identical 5x6mm footprint dimensions. However, the pinout configuration differs. The original part uses 5 leads while substitutes use 8 leads. PCB layout and schematic verification is required before implementation.

Q: What is the significance of the lower Moisture Sensitivity Level (MSL) in substitute parts?

A: The original NTMFS4923NET3G carries MSL 3 (168-hour shelf life limitation), requiring controlled storage and baking procedures before assembly. All substitute parts carry MSL 1 (unlimited shelf life), eliminating moisture sensitivity constraints and reducing manufacturing complexity and cost.

Q: Which substitute part should be selected for maximum current handling?

A: CSD17501Q5A provides the highest current rating at 100A (Tc) and the lowest Rds(on) at 10V drive voltage (2.9 mOhm). This part is optimal for applications requiring maximum current capacity and efficiency at 10V gate drive.

Q: Are all substitute parts RoHS compliant?

A: Yes, all four substitute parts are ROHS3 compliant. The original NTMFS4923NET3G does not have documented RoHS compliance status. This compliance improvement in substitutes ensures compatibility with current environmental regulations and procurement requirements.

Q: What gate drive voltage should be used with the substitute parts?

A: CSD17301Q5A, CSD17305Q5A, and CSD17306Q5A are optimized for 8V gate drive (Rds(on) specifications provided at 8V). CSD17501Q5A is optimized for 10V gate drive. All parts accept gate voltage ratings of ±10V to ±20V depending on the specific part. Verify gate drive voltage compatibility with your circuit design.

Q: Can the substitute parts operate at the same temperature range as the original?

A: Yes, all substitute parts operate from -55°C to 150°C, which exceeds the original part's -40°C to 150°C range. This provides additional margin for low-temperature applications.

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