FDMS7698 N-Channel 30V MOSFET Equivalent & Substitute Parts

Part Overview

The FDMS7698 is an N-Channel 30V MOSFET manufactured by onsemi in the PowerTrench® series. This device is rated for 13.5A continuous drain current (Ta) and 22A (Tc) in a surface mount 8-PQFN (5x6) package. The part is currently Active in product status with 32,400 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are required for supply chain diversification, or when design requirements permit operation within the specified electrical and mechanical parameter ranges of alternative devices.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current @ 25°C (Ta)	13.5	A
Continuous Drain Current @ 25°C (Tc)	22	A
On-Resistance (Rds On) @ 13.5A, 10V	10	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3	V
Gate Charge (Qg) @ 10V	24	nC
Input Capacitance (Ciss) @ 15V	1605	pF
Power Dissipation (Ta)	2.5	W
Power Dissipation (Tc)	29	W
Operating Temperature Range	-55 to 150	°C
Package Type	8-PQFN (5x6)	-
FET Type	N-Channel	-
Technology	MOSFET (Metal Oxide)	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the FDMS7698 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): 30V minimum
Continuous Drain Current (Id): 13.5A (Ta) or higher
On-Resistance (Rds On): 10mOhm or lower at specified gate voltage
Gate Threshold Voltage (Vgs(th)): Within ±20V maximum gate voltage specification
Operating Temperature Range: -55°C to 150°C minimum
Package Type: 8-pin surface mount configuration (8-PQFN, 8-TDSON, 8-VSON, or 8-HSOP)
Mounting Type: Surface Mount
Compliance: ROHS3 Compliant, MSL 1

Substitution Logic: Parts are grouped as direct substitutes when they meet or exceed the FDMS7698 electrical specifications while maintaining compatibility with the same voltage class (30V), current rating (13.5A minimum at Ta), and thermal performance. Package variants within the 8-pin surface mount family are acceptable provided PCB layout accommodates the specific pin configuration.

Parameter Comparison

Parameter	FDMS7698 (onsemi)	BSC080N03LSGATMA1 (Infineon)	BSC100N03MSGATMA1 (Infineon)	CSD17302Q5A (TI)	CSD17307Q5A (TI)	CSD17507Q5A (TI)	CSD17522Q5A (TI)	CSD17527Q5A (TI)	RS1E130GNTB (Rohm)	RS1E150GNTB (Rohm)
Manufacturer	onsemi	Infineon	Infineon	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Rohm	Rohm
Vdss (V)	30	30	30	30	30	30	30	30	30	30
Id @ Ta (A)	13.5	14	12	16	14	13	—	—	13	15
Id @ Tc (A)	22	53	44	87	73	65	87	65	—	40
Rds On (mOhm)	10 @ 13.5A, 10V	8 @ 30A, 10V	10 @ 30A, 10V	7.9 @ 14A, 8V	10.5 @ 11A, 8V	10.8 @ 11A, 10V	8.1 @ 14A, 10V	10.8 @ 11A, 10V	11.7 @ 13A, 10V	8.8 @ 15A, 10V
Vgs(th) (V)	3 @ 250µA	2.2 @ 250µA	2 @ 250µA	1.7 @ 250µA	1.8 @ 250µA	2.1 @ 250µA	2 @ 250µA	2 @ 250µA	2.5 @ 1mA	2.5 @ 1mA
Qg (nC)	24 @ 10V	21 @ 10V	23 @ 10V	7 @ 4.5V	5.2 @ 4.5V	3.6 @ 4.5V	4.3 @ 4.5V	3.4 @ 4.5V	7.9 @ 10V	10 @ 10V
Ciss (pF)	1605 @ 15V	1700 @ 15V	1700 @ 15V	950 @ 15V	700 @ 15V	530 @ 15V	695 @ 15V	506 @ 15V	420 @ 15V	590 @ 15V
Power Dissipation Ta (W)	2.5	2.5	2.5	3	3	3	3	3	3	3
Power Dissipation Tc (W)	29	35	30	—	—	—	—	—	22.2	22
Operating Temp Range (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	to 150	to 150
Package	8-PQFN (5x6)	PG-TDSON-8-5	PG-TDSON-8-5	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-VSONP (5x6)	8-HSOP	8-HSOP
Product Status	Active	Obsolete	Not For New Designs	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Product Status):

The following parts are recommended as direct substitutes based on Active product status and full compliance with ROHS3 and MSL 1 specifications:

CSD17507Q5A (Texas Instruments NexFET™): Meets or exceeds all electrical specifications with 13A (Ta) and 65A (Tc) ratings. Offers lower gate charge (3.6 nC) and reduced input capacitance (530 pF), resulting in improved switching performance. Available in Cut Tape and Digi-Reel® packaging. REACH Unaffected status.

CSD17527Q5A (Texas Instruments NexFET™): Provides 65A (Tc) capability with 10.8 mOhm on-resistance at 10V. Gate charge of 3.4 nC and input capacitance of 506 pF enable faster switching transitions. Available in Tape & Reel packaging with 32,600 units in stock.

RS1E150GNTB (Rohm Semiconductor): Rated for 15A (Ta) and 40A (Tc) with 8.8 mOhm on-resistance. Provides thermal performance of 22W (Tc) in 8-HSOP package. Active product status with 1,800 units in stock.

RS1E130GNTB (Rohm Semiconductor): Rated for 13A (Ta) with 11.7 mOhm on-resistance. Offers 22.2W (Tc) thermal capability in 8-HSOP package. Active product status with 1,900 units in stock.

CSD17302Q5A (Texas Instruments NexFET™): Rated for 16A (Ta) and 87A (Tc) with 7.9 mOhm on-resistance at 8V. Lowest gate charge (7 nC) among substitutes. REACH Affected status.

CSD17322Q5A (Texas Instruments NexFET™): Rated for 87A (Tc) with 8.8 mOhm on-resistance. Gate charge of 4.3 nC. REACH Affected status.

CSD17307Q5A (Texas Instruments NexFET™): Rated for 14A (Ta) and 73A (Tc) with 10.5 mOhm on-resistance. Gate charge of 5.2 nC. REACH Unaffected status.

Not Recommended for New Designs:

BSC080N03LSGATMA1 (Infineon OptiMOS™): Product status is Obsolete. Not suitable for new design implementations.

BSC100N03MSGATMA1 (Infineon OptiMOS™): Product status is Not For New Designs. Restricted for legacy system support only.

Frequently Asked Questions (FAQ)

Q: Can I use CSD17302Q5A as a direct replacement for FDMS7698?

A: CSD17302Q5A meets the electrical requirements with 16A (Ta) continuous drain current, exceeding the FDMS7698 specification of 13.5A. The 30V Vdss rating is identical. However, the package is 8-VSONP (5x6) versus the original 8-PQFN (5x6). While both are 8-pin surface mount packages with identical footprint dimensions (5x6 mm), PCB layout and thermal via placement may differ. Verify pin configuration compatibility with your schematic before implementation.

Q: What is the difference between the Infineon and Texas Instruments substitutes?

A: Infineon OptiMOS™ parts (BSC series) feature higher gate charge (21-23 nC) and input capacitance (1700 pF), similar to the FDMS7698. Texas Instruments NexFET™ parts (CSD series) feature significantly lower gate charge (3.4-7 nC) and input capacitance (506-950 pF), enabling faster switching speeds and reduced driver power consumption. Rohm parts offer intermediate characteristics. Selection depends on your circuit's switching frequency and driver capability requirements.

Q: Why are BSC080N03LSGATMA1 and BSC100N03MSGATMA1 listed if they are not recommended?

A: These parts are included for reference and legacy system support only. BSC080N03LSGATMA1 is Obsolete and BSC100N03MSGATMA1 is Not For New Designs. Both meet the electrical specifications but should not be selected for new product development due to their restricted product status.

Q: Are there package compatibility issues between FDMS7698 and the substitute parts?

A: The FDMS7698 uses 8-PQFN (5x6) packaging. Substitute parts use 8-PQFN, 8-TDSON, 8-VSON, or 8-HSOP packages. All are 8-pin surface mount devices with 5x6 mm footprints. Pin configurations differ between manufacturers. Verify the pinout diagram for your selected substitute against your PCB layout and schematic before production. Thermal via placement and copper area distribution may require adjustment based on the specific package variant.

Q: What is the significance of the lower gate charge in Texas Instruments parts?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. Lower gate charge (3.4-7 nC in CSD series versus 24 nC in FDMS7698) reduces driver power consumption and enables faster switching transitions. This is beneficial in high-frequency switching applications but requires verification that your gate driver can supply the necessary current at the specified voltage levels.

Q: Can I use RS1E150GNTB in a high-temperature application?

A: RS1E150GNTB is rated for operating temperatures up to 150°C (TJ), matching the FDMS7698 specification. However, the datasheet lists only the maximum temperature without specifying the minimum. Confirm the full operating temperature range (-55°C to 150°C) with Rohm Semiconductor before use in applications requiring the full temperature span.

Q: What does REACH Affected versus REACH Unaffected mean for substitution?

A: REACH Affected parts (CSD17302Q5A, CSD17322Q5A, CSD17522Q5A) are subject to European REACH regulations and may require additional compliance documentation. REACH Unaffected parts (CSD17307Q5A, CSD17507Q5A, CSD17527Q5A, Infineon, Rohm parts) are not subject to these restrictions. Selection depends on your end-market requirements and regulatory obligations.

Q: Is on-resistance (Rds On) the only thermal consideration?

A: No. On-resistance determines I²R losses, but total thermal performance depends on power dissipation rating (Tc), junction-to-case thermal resistance, and PCB thermal design. FDMS7698 is rated 29W (Tc). Substitutes range from 22W to 35W (Tc). Lower on-resistance does not guarantee lower junction temperature if power dissipation rating is lower. Perform thermal analysis for your specific application.

Q: Can I substitute FDMS7698 with a part rated for higher voltage (e.g., 40V or 60V)?

A: Higher voltage-rated parts are not listed as substitutes in this reference. Substitution is limited to parts with identical or lower Vdss ratings (30V). Using a higher voltage device introduces unnecessary cost and may degrade performance characteristics optimized for 30V operation.

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