DMTH43M8LFG-13 Equivalent & Substitute Parts

Part Overview

The DMTH43M8LFG-13 is an N-Channel 40V MOSFET manufactured by Diodes Incorporated in the PowerDI3333-8 surface mount package. This device is rated for continuous drain current of 24A (Ta) and 100A (Tc) with a maximum on-resistance of 3mOhm at 20A and 10V gate-source voltage. The part is classified as Active product status and is ROHS3 compliant with AEC-Q101 automotive qualification available in variant forms.

Substitute parts are necessary when the primary part number becomes unavailable due to inventory constraints, supply chain disruptions, or when alternative packaging designations or automotive-grade variants are required for specific application requirements.

Key Parameters

Parameter	Value
FET Type	N-Channel
Technology	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss)	40 V
Continuous Drain Current (Id) @ 25°C	24A (Ta), 100A (Tc)
Rds On (Max) @ 20A, 10V	3 mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2.5 V
Gate Charge (Qg) @ 10V	40.1 nC
Input Capacitance (Ciss) @ 20V	2798 pF
Power Dissipation (Max)	2.62W (Ta), 65.2W (Tc)
Operating Temperature Range	-55°C to 175°C (TJ)
Package Type	8-PowerVDFN
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DMTH43M8LFG-13 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

Drain to Source Voltage (Vdss): 40V
Continuous Drain Current (Id): 24A (Ta), 100A (Tc)
On-Resistance (Rds On): 3 mOhm @ 20A, 10V
Gate Threshold Voltage (Vgs(th)): 2.5V @ 250µA
Gate Charge (Qg): 40.1 nC @ 10V
Input Capacitance (Ciss): 2798 pF @ 20V
Power Dissipation: 2.62W (Ta), 65.2W (Tc)
Operating Temperature Range: -55°C to 175°C (TJ)

Mechanical Parameters (Must Match):

Package Type: 8-PowerVDFN
Mounting Type: Surface Mount
Supplier Device Package: PowerDI3333-8

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

All substitute parts listed maintain identical electrical and mechanical specifications. Variants differ only in packaging designation suffix (LFG vs. LFGQ) and tape reel configuration (-13 vs. -7), with LFGQ variants carrying AEC-Q101 automotive qualification.

Parameter Comparison

Parameter	DMTH43M8LFG-13	DMTH43M8LFG-7	DMTH43M8LFGQ-13	DMTH43M8LFGQ-7
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
FET Type	N-Channel	N-Channel	N-Channel	N-Channel
Vdss	40 V	40 V	40 V	40 V
Id @ 25°C	24A (Ta), 100A (Tc)	24A (Ta), 100A (Tc)	24A (Ta), 100A (Tc)	24A (Ta), 100A (Tc)
Rds On (Max)	3 mOhm @ 20A, 10V	3 mOhm @ 20A, 10V	3 mOhm @ 20A, 10V	3 mOhm @ 20A, 10V
Vgs(th)	2.5 V @ 250µA	2.5 V @ 250µA	2.5 V @ 250µA	2.5 V @ 250µA
Qg	40.1 nC @ 10V	40.1 nC @ 10V	40.1 nC @ 10V	40.1 nC @ 10V
Ciss	2798 pF @ 20V	2798 pF @ 20V	2798 pF @ 20V	2798 pF @ 20V
Power Dissipation (Max)	2.62W (Ta), 65.2W (Tc)	2.62W (Ta), 65.2W (Tc)	2.62W (Ta), 65.2W (Tc)	2.62W (Ta), 65.2W (Tc)
Operating Temperature	-55°C to 175°C (TJ)	-55°C to 175°C (TJ)	-55°C to 175°C (TJ)	-55°C to 175°C (TJ)
Package / Case	8-PowerVDFN	8-PowerVDFN	8-PowerVDFN	8-PowerVDFN
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	Standard	Standard	AEC-Q101	AEC-Q101
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four part numbers are functionally equivalent and directly interchangeable based on electrical and mechanical parameters. Selection between variants is determined by application requirements and supply availability:

DMTH43M8LFG-13 and DMTH43M8LFG-7: Standard industrial-grade MOSFETs suitable for general-purpose switching applications. Both variants maintain identical electrical specifications and differ only in tape reel configuration. Selection between -13 and -7 designations is based on reel quantity requirements and procurement logistics.

DMTH43M8LFGQ-13 and DMTH43M8LFGQ-7: Automotive-grade variants with AEC-Q101 qualification. These parts are required for applications subject to automotive industry standards and reliability requirements. The LFGQ designation indicates automotive qualification; electrical and mechanical parameters remain identical to standard variants.

All parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements beyond standard component practices.

Frequently Asked Questions (FAQ)

Q: Can DMTH43M8LFG-13 be replaced with DMTH43M8LFGQ-13?

A: Yes. Both parts are electrically and mechanically identical. The LFGQ variant includes AEC-Q101 automotive qualification. Substitution is valid for all applications where the standard variant is used. If automotive qualification is required by specification, the LFGQ variant must be selected.

Q: What is the difference between the -13 and -7 suffix designations?

A: The suffix designates tape reel configuration and quantity per reel. Both -13 and -7 variants contain identical MOSFET dies and electrical specifications. Selection is based on procurement quantity requirements and reel format compatibility with assembly equipment.

Q: Are all substitute parts in the same package?

A: Yes. All four part numbers use the 8-PowerVDFN package type with PowerDI3333-8 supplier device package designation. PCB footprints and assembly processes are identical across all variants.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. All substitute parts maintain identical electrical parameters including Vdss, Id, Rds On, Vgs(th), Qg, Ciss, and power dissipation ratings. No circuit redesign or board layout modification is required for substitution.

Q: Which variant should be selected for automotive applications?

A: DMTH43M8LFGQ-13 or DMTH43M8LFGQ-7 must be selected for automotive applications. These variants carry AEC-Q101 qualification required by automotive industry standards. Standard variants (LFG) lack this qualification.

Q: Is there a difference in reliability or performance between variants?

A: All variants are manufactured to identical electrical and mechanical specifications. Automotive-grade variants (LFGQ) undergo additional qualification testing per AEC-Q101 standards. Performance and reliability characteristics are equivalent across all part numbers when operated within specified parameters.

Q: What inventory considerations apply to these substitutes?

A: DMTH43M8LFGQ-13 maintains the highest inventory level at 8,359 pieces. DMTH43M8LFG-7 has 4,609 pieces available. DMTH43M8LFGQ-7 has 3,577 pieces, and DMTH43M8LFG-13 has 1,106 pieces in stock. Substitute selection may be influenced by current inventory availability and procurement lead times.

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