FDS3992 Equivalent & Substitute Parts

Part Overview

The FDS3992 is a dual N-channel MOSFET manufactured by onsemi, designed for surface mount applications requiring 100V drain-to-source voltage capability with 4.5A continuous drain current. This device operates within the PowerTrench® series and is classified as an active product with ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific design requirements.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	100	V
Current - Continuous Drain (Id) @ 25°C	4.5	A
Rds On (Max) @ Id, Vgs	62 @ 4.5A, 10V	mOhm
Vgs(th) (Max) @ Id	4 @ 250µA	V
Gate Charge (Qg) (Max) @ Vgs	15 @ 10V	nC
Input Capacitance (Ciss) (Max) @ Vds	750 @ 25V	pF
Power - Max	2.5	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)	-
Configuration	2 N-Channel (Dual)	-
Technology	MOSFET (Metal Oxide)	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the FDS3992 is based on strict electrical and mechanical compatibility criteria. The following parameters define the substitution scope:

Mandatory Matching Parameters:

Drain to Source Voltage (Vdss): 100V minimum
Configuration: 2 N-Channel (Dual)
Package / Case: 8-SOIC form factor (0.154", 3.90mm Width)
Technology: MOSFET (Metal Oxide)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C (TJ)
RoHS Status: ROHS3 Compliant

Allowable Parameter Variations: Substitute parts may exhibit reduced continuous drain current (Id), increased on-resistance (Rds On), reduced gate charge (Qg), and reduced input capacitance (Ciss) compared to the FDS3992. These reductions represent conservative substitutions suitable for applications where the FDS3992's performance envelope exceeds circuit requirements.

The ZXMN10A08DN8TA from Diodes Incorporated meets all mandatory matching criteria while operating within the defined allowable variations.

Parameter Comparison

Parameter	FDS3992 (onsemi)	ZXMN10A08DN8TA (Diodes Inc.)	Unit
Drain to Source Voltage (Vdss)	100	100	V
Current - Continuous Drain (Id) @ 25°C	4.5	1.6	A
Rds On (Max) @ Id, Vgs	62 @ 4.5A, 10V	250 @ 3.2A, 10V	mOhm
Vgs(th) (Max) @ Id	4 @ 250µA	2 @ 250µA (Min)	V
Gate Charge (Qg) (Max) @ Vgs	15 @ 10V	7.7 @ 10V	nC
Input Capacitance (Ciss) (Max) @ Vds	750 @ 25V	405 @ 50V	pF
Power - Max	2.5	1.25	W
Operating Temperature Range	-55 to 150	-55 to 150	°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	-
Configuration	2 N-Channel (Dual)	2 N-Channel (Dual)	-
Technology	MOSFET (Metal Oxide)	MOSFET (Metal Oxide)	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	-

Engineering Selection Recommendations

FDS3992 (onsemi): Select this part for applications requiring maximum continuous drain current of 4.5A and lowest on-resistance at specified gate voltage. The FDS3992 provides superior current handling and thermal performance within the 8-SOIC package. Active product status with ROHS3 compliance and unlimited moisture sensitivity rating ensure long-term supply availability and environmental compliance.

ZXMN10A08DN8TA (Diodes Incorporated): Select this part for applications where continuous drain current requirements do not exceed 1.6A and where reduced gate charge and input capacitance provide circuit advantages. This substitute operates within identical voltage and temperature specifications. Active product status with ROHS3 compliance and unlimited moisture sensitivity rating provide equivalent compliance and supply reliability.

Both parts share identical package geometry, voltage rating, temperature range, and regulatory compliance status. Selection between these devices depends solely on application current and power dissipation requirements.

Frequently Asked Questions (FAQ)

Q: Can the ZXMN10A08DN8TA replace the FDS3992 in all applications?

A: The ZXMN10A08DN8TA is suitable for applications where continuous drain current does not exceed 1.6A. Applications requiring the full 4.5A continuous drain current capability of the FDS3992 require the original part or equivalent higher-current alternatives.

Q: Are the package dimensions identical between FDS3992 and ZXMN10A08DN8TA?

A: Both devices use the 8-SOIC package with 0.154" (3.90mm) width. PCB layout and footprints are mechanically compatible without modification.

Q: What is the difference in on-resistance between these parts?

A: The FDS3992 exhibits 62mOhm maximum on-resistance at 4.5A and 10V gate voltage. The ZXMN10A08DN8TA exhibits 250mOhm maximum on-resistance at 3.2A and 10V gate voltage. Higher on-resistance results in increased power dissipation at equivalent current levels.

Q: Do both parts meet the same environmental and compliance standards?

A: Both the FDS3992 and ZXMN10A08DN8TA are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity). Both operate across -55°C to 150°C junction temperature range.

Q: What is the significance of gate charge differences?

A: The FDS3992 exhibits 15nC maximum gate charge at 10V, while the ZXMN10A08DN8TA exhibits 7.7nC. Lower gate charge reduces driver power requirements and enables faster switching transitions in gate drive circuits.

Q: Are there packaging format differences between these parts?

A: The FDS3992 is supplied in Cut Tape (CT) and Digi-Reel® formats. The ZXMN10A08DN8TA is supplied in Tape & Reel (TR) format. Both formats are compatible with standard surface mount assembly equipment.

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