FDMC86184 N-Channel MOSFET 100V 57A Equivalent & Substitute Parts

Part Overview

The FDMC86184 is an N-Channel MOSFET manufactured by onsemi, rated for 100V drain-to-source voltage with 57A continuous drain current at Tc. This device is part of the PowerTrench® series and is housed in an 8-PQFN (3.3x3.3) surface mount package. The part is currently in active production status with RoHS3 compliance and MSL 1 moisture sensitivity rating.

Equivalent and substitute parts are identified when design requirements permit operation at alternative voltage ratings, current specifications, or thermal conditions while maintaining functional compatibility within the application circuit.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current (Id) @ 25°C	57	A (Tc)
RDS(on) Max @ Id, Vgs	8.5	mOhm @ 21A, 10V
Gate Threshold Voltage (Vgs(th)) Max	4	V @ 110µA
Gate Charge (Qg) Max	20	nC @ 6V
Input Capacitance (Ciss) Max	2090	pF @ 50V
Power Dissipation Max	54	W (Tc)
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	8-PowerWDFN (3.3x3.3)	Surface Mount
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the FDMC86184 are identified based on the following substitution criteria:

Primary Matching Parameters:

FET Type: N-Channel MOSFET technology
Mounting Type: Surface Mount
Package Family: 8-PowerWDFN (3.3x3.3) footprint compatibility
Operating Temperature Range: -55°C to 150°C (TJ)
RoHS3 Compliance and MSL 1 rating
Gate Drive Voltage Compatibility: 6V and 10V operation

Secondary Compatibility Parameters:

Drain-to-Source Voltage (Vdss): 80V or 100V rated devices
Continuous Drain Current (Id): Devices rated 50A (Tc) or higher
RDS(on) characteristics: Maximum on-resistance specifications
Gate Charge (Qg): Switching performance parameters
Input Capacitance (Ciss): Gate capacitance characteristics

Substitutes are valid when the application circuit permits operation at the specified voltage and current ratings of the alternative device without exceeding thermal or electrical stress limits.

Parameter Comparison

Parameter	FDMC86184 (Main)	AONR66922	AON7280
Manufacturer	onsemi	Alpha & Omega Semiconductor Inc.	Alpha & Omega Semiconductor Inc.
FET Type	N-Channel	N-Channel	N-Channel
Vdss Rating	100V	100V	80V
Id @ 25°C (Tc)	57A	50A	50A
RDS(on) Max @ 10V	8.5 mOhm @ 21A	9 mOhm @ 15A	8.5 mOhm @ 20A
Vgs(th) Max	4V @ 110µA	2.5V @ 250µA	3.4V @ 250µA
Gate Charge (Qg) Max	20 nC @ 6V	46 nC @ 10V	38 nC @ 10V
Ciss Max	2090 pF @ 50V	2180 pF @ 50V	1871 pF @ 40V
Power Dissipation Max (Tc)	54W	52W	83W
Operating Temperature	-55 to 150°C	-55 to 150°C	-55 to 150°C
Package	8-PowerWDFN (3.3x3.3)	8-DFN-EP (3.3x3.3)	8-DFN-EP (3.3x3.3)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

AONR66922 Substitution: The AONR66922 is a direct voltage-class substitute for the FDMC86184, both rated at 100V Vdss. This device maintains the same operating temperature range (-55°C to 150°C) and achieves RoHS3 compliance with MSL 1 rating. The AONR66922 delivers 50A continuous drain current at Tc, which is within the thermal envelope of applications designed for the FDMC86184. The 8-DFN-EP package footprint is compatible with the 8-PowerWDFN layout. Gate charge specification of 46 nC at 10V indicates increased switching energy compared to the main part. This substitute is suitable for applications where the 100V voltage rating is required and current demand does not exceed 50A at Tc.

AON7280 Substitution: The AON7280 operates at a reduced voltage rating of 80V Vdss, making it applicable only to circuits where the maximum operating voltage does not exceed 80V. This device is rated for 50A continuous drain current at Tc and maintains the same temperature range and compliance certifications as the main part. The 8-DFN-EP package provides footprint compatibility. Gate charge of 38 nC at 10V represents lower switching energy than the FDMC86184. The AON7280 is suitable for lower-voltage applications where the 80V rating is sufficient and current requirements align with the 50A specification.

Both substitute parts maintain active product status and are available in production quantities.

Frequently Asked Questions (FAQ)

Q: Can the AONR66922 be used as a direct replacement for the FDMC86184 in all applications?

A: The AONR66922 is suitable for applications where the circuit operates at or below 100V and the continuous drain current requirement does not exceed 50A at Tc. The 100V voltage rating matches the FDMC86184. Verify that the application's current profile aligns with the 50A specification and that thermal management accommodates the 52W power dissipation rating at Tc.

Q: What is the primary limitation of the AON7280 as a substitute?

A: The AON7280 is rated for 80V Vdss, which is 20V lower than the FDMC86184. This device is only suitable for applications where the maximum circuit voltage does not exceed 80V. If the application requires 100V voltage headroom, the AON7280 is not appropriate.

Q: Are the package footprints of the substitute parts compatible with the FDMC86184?

A: The FDMC86184 uses an 8-PowerWDFN (3.3x3.3) package, while both substitute parts use an 8-DFN-EP (3.3x3.3) package. Both packages share the same 3.3x3.3mm footprint dimensions and are compatible with the same PCB layout. Verify pin assignment compatibility with your specific circuit design.

Q: How do the gate charge specifications affect device selection?

A: The FDMC86184 specifies 20 nC gate charge at 6V, while the AONR66922 specifies 46 nC at 10V and the AON7280 specifies 38 nC at 10V. Higher gate charge increases switching energy and may require higher gate drive current. Confirm that your gate driver circuit can supply the required charge for the selected device.

Q: Are all three devices compliant with the same regulatory standards?

A: Yes. The FDMC86184, AONR66922, and AON7280 are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All three devices are REACH unaffected and classified under ECCN EAR99.

Q: What thermal considerations apply when selecting between these devices?

A: The FDMC86184 is rated for 54W power dissipation at Tc, the AONR66922 for 52W at Tc, and the AON7280 for 83W at Tc. The AON7280 exhibits higher thermal capability due to its lower voltage rating. Ensure your thermal management design accommodates the power dissipation of the selected device under worst-case operating conditions.

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