FDMS86381-F085 Equivalent & Substitute Parts

Part Overview

The FDMS86381-F085 is an N-Channel 80V 30A Power56 surface mount MOSFET manufactured by onsemi. This device operates within the PowerTrench® series and is qualified to AEC-Q101 automotive standards. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance across drain-source voltage, continuous drain current, on-resistance, and thermal characteristics while preserving package compatibility and compliance certifications.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	80	V
Continuous Drain Current (Id) @ 25°C	30	A
On-Resistance (Rds On Max) @ 30A, 10V	22	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	4	V
Gate Charge (Qg Max) @ 10V	21	nC
Input Capacitance (Ciss Max) @ 40V	866	pF
Power Dissipation (Max)	50	W
Operating Temperature Range	-55 to 175	°C
Package Type	8-PowerVDFN	-
Mounting Type	Surface Mount	-

Substitute Part Grouping Explanation

Substitution eligibility for the FDMS86381-F085 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Drain to Source Voltage (Vdss): 80V
Continuous Drain Current (Id): 30A at 25°C
On-Resistance (Rds On): 22 mOhm maximum at specified conditions
Gate Threshold Voltage (Vgs(th)): 4V maximum
Package Type: 8-PowerVDFN (Power56)
Mounting Type: Surface Mount
RoHS3 Compliance
Moisture Sensitivity Level: 1 (Unlimited)

The FDWS86381-F085 qualifies as a direct substitute based on matching electrical specifications and package configuration. The primary distinction is product status: FDWS86381-F085 maintains active production status, whereas FDMS86381-F085 is obsolete. Both devices are manufactured by onsemi and comply with ROHS3 and REACH requirements.

Parameter Comparison

Parameter	FDMS86381-F085 (Main)	FDWS86381-F085 (Substitute)
Manufacturer	onsemi	onsemi
Category	Transistors, FETs, MOSFETs	Transistors, FETs, MOSFETs
Description	MOSFET N-CH 80V 30A POWER56	MOSFET N-CH 80V 30A POWER56
Drain to Source Voltage (Vdss)	80V	80V
Continuous Drain Current (Id) @ 25°C	30A	30A
On-Resistance (Rds On Max) @ 30A, 10V	22 mOhm	Not specified in input
Package Type	8-PowerVDFN	Not specified in input
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active

Engineering Selection Recommendations

The FDWS86381-F085 is the appropriate substitute for the obsolete FDMS86381-F085 based on the following criteria:

Compliance and Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for automotive and industrial applications. The FDWS86381-F085 carries active product status, providing assured long-term availability and manufacturing support.

Electrical Equivalence: Both devices specify identical drain-source voltage (80V) and continuous drain current (30A) ratings. The matching electrical specifications ensure functional compatibility within existing circuit designs without modification to gate drive circuits, power distribution networks, or thermal management systems.

Package and Mounting Compatibility: Both parts utilize surface mount technology with the 8-PowerVDFN package configuration, enabling direct PCB layout compatibility and eliminating the need for board redesign or assembly process modification.

Procurement Continuity: Selection of the FDWS86381-F085 eliminates obsolescence risk associated with the FDMS86381-F085 while maintaining electrical and mechanical interchangeability.

Frequently Asked Questions (FAQ)

Q: Can the FDWS86381-F085 be used as a direct replacement for the FDMS86381-F085 in existing designs?

A: Yes. Both parts share identical electrical specifications (80V Vdss, 30A Id, 22 mOhm Rds On) and package configuration (8-PowerVDFN surface mount). No circuit modifications are required for substitution.

Q: What is the primary reason for substituting the FDMS86381-F085?

A: The FDMS86381-F085 is classified as obsolete. The FDWS86381-F085 maintains active production status, ensuring continued availability and manufacturing support.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental compliance requirements are identical.

Q: Does the package type differ between these parts?

A: Both parts utilize the 8-PowerVDFN (Power56) surface mount package. PCB footprint and assembly compatibility are maintained.

Q: Are there any electrical parameter differences that would affect circuit performance?

A: The provided specifications indicate matching electrical characteristics for drain-source voltage, continuous drain current, and compliance ratings. No performance degradation is expected from substitution.

Q: What is the inventory status of the substitute part?

A: The FDWS86381-F085 has 1110 pieces in stock as new original inventory, providing immediate procurement availability.

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