FDMS86300DC N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDMS86300DC is an N-Channel MOSFET manufactured by onsemi, rated for 80V drain-to-source voltage with continuous drain current of 24A at Ta and 76A at Tc. This device is part of the Dual Cool™ and PowerTrench® series and is housed in an 8-PQFN (5x6) surface mount package. The part is currently Active in product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified when alternative MOSFETs share the same critical electrical specifications and package compatibility, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	80	V
Continuous Drain Current @ 25°C (Ta)	24	A
Continuous Drain Current @ 25°C (Tc)	76	A
RDS(on) Max @ 24A, 10V	3.1	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4.5	V
Gate Charge (Qg) @ 10V	101	nC
Input Capacitance (Ciss) @ 40V	7005	pF
Operating Temperature Range	-55 to 150	°C
Package Type	8-PQFN (5x6)	Surface Mount
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the FDMS86300DC are identified based on the following critical parameters that determine functional equivalence:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 80V
Continuous Drain Current: Must support the application's current requirements
RDS(on) characteristics: Must be within acceptable range for power dissipation
Gate Threshold Voltage (Vgs(th)): Must be compatible with drive circuitry
Operating Temperature Range: Must cover the application's thermal requirements

Mechanical Compatibility Criteria:

Package Type: Surface mount packages with 5x6mm footprint dimensions
Pin Configuration: 8-pin configuration with compatible pinout
Mounting Type: Surface mount technology

Compliance Criteria:

RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 (Unlimited)
REACH Status: REACH Unaffected

The substitute parts AON6278 and STL130N8F7 meet these criteria with equivalent or superior electrical performance and compatible package specifications.

Parameter Comparison

Parameter	FDMS86300DC (onsemi)	AON6278 (Alpha & Omega)	STL130N8F7 (STMicroelectronics)	Unit
Manufacturer	onsemi	Alpha & Omega Semiconductor Inc.	STMicroelectronics	-
Drain-to-Source Voltage (Vdss)	80	80	80	V
Continuous Drain Current @ Ta	24	34	-	A
Continuous Drain Current @ Tc	76	85	130	A
RDS(on) Max @ 10V	3.1 @ 24A	3.3 @ 20A	3.6 @ 13A	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4.5	3.3	4.5	V
Gate Charge (Qg) @ 10V	101	86	96	nC
Input Capacitance (Ciss) @ 40V	7005	4646	6340	pF
Power Dissipation Max @ Tc	125	208	135	W
Operating Temperature Range	-55 to 150	-55 to 150	-55 to 175	°C
Package Type	8-PQFN (5x6)	8-DFN (5x6)	PowerFlat™ (5x6)	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	-
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	-
Product Status	Active	Active	Active	-

Engineering Selection Recommendations

FDMS86300DC (Primary Part)

The FDMS86300DC remains the primary selection when the original design specifications call for the Dual Cool™ and PowerTrench® series characteristics. This part is Active in product status with full RoHS3 compliance and unlimited MSL rating, ensuring long-term availability and environmental compliance.

AON6278 (Alpha & Omega Semiconductor Inc.)

The AON6278 serves as a direct substitute with enhanced electrical performance. It provides higher continuous drain current (34A at Ta, 85A at Tc) compared to the FDMS86300DC (24A at Ta, 76A at Tc), while maintaining the same 80V Vdss rating. The RDS(on) specification of 3.3mOhm at 20A, 10V is comparable to the primary part. The AON6278 features lower gate charge (86nC versus 101nC) and reduced input capacitance (4646pF versus 7005pF), resulting in faster switching characteristics. The 8-DFN (5x6) package is mechanically compatible with the original 8-PQFN (5x6) footprint. This part is Active with RoHS3 compliance and MSL 1 rating.

STL130N8F7 (STMicroelectronics)

The STL130N8F7 is suitable for applications requiring significantly higher current handling capability. This part delivers 130A continuous drain current at Tc, substantially exceeding the FDMS86300DC specification. The RDS(on) of 3.6mOhm at 13A, 10V is within acceptable range. The STL130N8F7 features an extended operating temperature range of -55°C to 175°C, providing 25°C additional high-temperature margin compared to the primary part. The PowerFlat™ (5x6) package maintains mechanical compatibility with the original footprint. This part is Active with RoHS3 compliance, MSL 1 rating, and supports operation at higher junction temperatures.

All three parts are Active in product status, RoHS3 compliant, and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compliance with environmental and reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the AON6278 be used as a direct replacement for the FDMS86300DC?

A: The AON6278 is mechanically and electrically compatible for direct substitution. Both devices share the same 80V Vdss rating and operate within the same temperature range (-55°C to 150°C). The AON6278 provides higher continuous drain current (34A at Ta, 85A at Tc) and lower gate charge (86nC versus 101nC), making it suitable for applications where the FDMS86300DC is specified. The 8-DFN (5x6) package footprint is compatible with the original 8-PQFN (5x6) design.

Q: What are the key differences between the AON6278 and STL130N8F7?

A: The primary differences are continuous drain current and operating temperature range. The AON6278 provides 34A at Ta and 85A at Tc, while the STL130N8F7 delivers 130A at Tc. The STL130N8F7 supports operation up to 175°C junction temperature, compared to 150°C for the AON6278. The STL130N8F7 is selected for high-current applications or designs requiring extended thermal headroom. Both parts maintain 80V Vdss and are RoHS3 compliant.

Q: Are package dimensions identical across all three parts?

A: All three parts use 5x6mm surface mount packages: the FDMS86300DC uses 8-PQFN, the AON6278 uses 8-DFN, and the STL130N8F7 uses PowerFlat™. While the package designations differ, the physical footprint dimensions are compatible, allowing PCB layout reuse without modification.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. The FDMS86300DC, AON6278, and STL130N8F7 are all RoHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity ratings, and are REACH Unaffected. All three parts are classified as Active in product status, ensuring continued availability and support.

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

A: The STL130N8F7 provides the highest continuous drain current at 130A (Tc), making it the appropriate choice for applications requiring maximum current capacity. The AON6278 offers intermediate current capability at 85A (Tc), while the FDMS86300DC is rated for 76A (Tc).

Q: How do gate charge specifications affect circuit performance?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The AON6278 has the lowest gate charge at 86nC, followed by the STL130N8F7 at 96nC, and the FDMS86300DC at 101nC. Lower gate charge results in faster switching transitions and reduced driver power dissipation, which is beneficial in high-frequency switching applications.

Q: Are there packaging considerations for PCB assembly?

A: All three parts are surface mount devices with 8-pin configurations in 5x6mm packages. The mechanical compatibility of the footprints allows direct PCB layout reuse. However, assembly process parameters (reflow temperature profiles, solder paste specifications) should be verified with each manufacturer's datasheet to ensure optimal solder joint quality.

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