DMTH4008LFDFW-7 Equivalent & Substitute Parts

Part Overview

The DMTH4008LFDFW-7 is an N-Channel MOSFET manufactured by Diodes Incorporated, rated for 40V drain-to-source voltage with 11.6A continuous drain current at 25°C. This device is housed in a 6-UDFN surface mount package with exposed pad and is qualified to AEC-Q101 automotive standards. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified when design requirements permit component interchange based on matching electrical characteristics, package compatibility, and operational ratings. Substitution analysis focuses on drain-to-source voltage, continuous drain current, on-resistance, gate charge, and thermal specifications to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Specification Basis
Drain to Source Voltage (Vdss)	40 V	Maximum voltage rating
Continuous Drain Current (Id) @ 25°C	11.6 A (Ta)	Thermal ambient rating
On-Resistance (Rds On Max) @ 10A, 10V	11.5 mOhm	Conduction loss specification
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	3 V	Gate drive requirement
Gate Charge (Qg Max) @ 10V	14.2 nC	Switching speed characteristic
Input Capacitance (Ciss Max) @ 20V	1030 pF	Input impedance specification
Power Dissipation (Max)	990 mW (Ta)	Thermal limit at ambient
Operating Temperature Range	-55°C to 175°C (TJ)	Junction temperature limits
Package Type	6-UDFN Exposed Pad	Surface mount form factor
Qualification Standard	AEC-Q101	Automotive grade requirement

Substitute Part Grouping Explanation

Substitute parts for the DMTH4008LFDFW-7 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Diodes Incorporated): Parts DMTH4008LFDFWQ-13 and DMTH4008LFDFWQ-7 share identical electrical specifications with the main part. These devices maintain the same drain-to-source voltage (40V), continuous drain current (11.6A), on-resistance (11.5 mOhm @ 10A, 10V), gate charge (14.2 nC @ 10V), and operating temperature range (-55°C to 175°C). All three parts use the same 6-UDFN package with exposed pad, identical AEC-Q101 qualification, and ROHS3 compliance. The substitution is based on matching all critical electrical parameters and package specifications.

Manufacturer Recommended Substitute (Nexperia USA Inc.): Part PMPB14XNX is a cross-manufacturer alternative with the same 40V drain-to-source voltage rating and 6-UDFN package form factor. However, this part exhibits lower continuous drain current (8.1A versus 11.6A), higher on-resistance (18 mOhm @ 8.1A, 4.5V), higher gate charge (28 nC @ 4.5V), and reduced maximum operating temperature (150°C versus 175°C). This substitute is suitable only for applications where the lower current rating and thermal characteristics are acceptable.

Parameter Comparison

Parameter	DMTH4008LFDFW-7	DMTH4008LFDFWQ-13	DMTH4008LFDFWQ-7	PMPB14XNX
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.
Drain to Source Voltage (Vdss)	40 V	40 V	40 V	40 V
Continuous Drain Current (Id) @ 25°C	11.6 A (Ta)	11.6 A (Ta)	11.6 A (Ta)	8.1 A (Ta)
Rds On (Max) @ Specified Conditions	11.5 mOhm @ 10A, 10V	11.5 mOhm @ 10A, 10V	11.5 mOhm @ 10A, 10V	18 mOhm @ 8.1A, 4.5V
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	3 V	3 V	3 V	900 mV
Gate Charge (Qg Max) @ Specified Vgs	14.2 nC @ 10V	14.2 nC @ 10V	14.2 nC @ 10V	28 nC @ 4.5V
Input Capacitance (Ciss Max) @ 20V	1030 pF	1030 pF	1030 pF	1625 pF
Power Dissipation (Max)	990 mW (Ta)	990 mW (Ta)	990 mW (Ta)	3.8 W (Ta), 12.5 W (Tc)
Operating Temperature Range (TJ)	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C	-55°C to 150°C
Package Type	6-UDFN Exposed Pad	6-UDFN Exposed Pad	6-UDFN Exposed Pad	6-UDFN Exposed Pad
Qualification Standard	AEC-Q101	AEC-Q101	AEC-Q101	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Substitution (Parametric Equivalents): Parts DMTH4008LFDFWQ-13 and DMTH4008LFDFWQ-7 are direct parametric equivalents to DMTH4008LFDFW-7. All three devices maintain identical electrical specifications, package form factor, and AEC-Q101 automotive qualification. These parts are interchangeable in applications where the original part number is specified. Selection between these three equivalent parts may be based on inventory availability and lead time considerations. All three parts are active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Cross-Manufacturer Substitution (Nexperia PMPB14XNX): The PMPB14XNX from Nexperia USA Inc. is a cross-manufacturer alternative suitable only for applications where the reduced continuous drain current (8.1A versus 11.6A) and lower maximum operating temperature (150°C versus 175°C) are acceptable. This part exhibits higher on-resistance (18 mOhm versus 11.5 mOhm) and higher gate charge (28 nC versus 14.2 nC), resulting in increased conduction losses and switching losses. The PMPB14XNX is not qualified to AEC-Q101 automotive standards based on provided specifications. This substitute is suitable for non-automotive applications or designs with reduced current and thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can DMTH4008LFDFWQ-13 and DMTH4008LFDFWQ-7 be used interchangeably with DMTH4008LFDFW-7?

A: Yes. These three parts are parametric equivalents with identical drain-to-source voltage (40V), continuous drain current (11.6A), on-resistance (11.5 mOhm @ 10A, 10V), gate charge (14.2 nC @ 10V), and operating temperature range (-55°C to 175°C). All three use the same 6-UDFN package with exposed pad and maintain AEC-Q101 automotive qualification. Substitution is direct for applications requiring these specifications.

Q: What are the limitations of using PMPB14XNX as a substitute?

A: The PMPB14XNX has a lower continuous drain current rating (8.1A versus 11.6A), higher on-resistance (18 mOhm versus 11.5 mOhm), higher gate charge (28 nC versus 14.2 nC), and reduced maximum operating temperature (150°C versus 175°C). This part is suitable only for applications where these reduced ratings are acceptable. The PMPB14XNX is not qualified to AEC-Q101 automotive standards.

Q: Are all substitute parts in the same package?

A: Yes. All four parts (DMTH4008LFDFW-7, DMTH4008LFDFWQ-13, DMTH4008LFDFWQ-7, and PMPB14XNX) use the 6-UDFN package with exposed pad. Package footprint and pinout are identical, allowing direct board-level substitution without layout modifications.

Q: What is the difference between the three Diodes Incorporated parts?

A: DMTH4008LFDFW-7, DMTH4008LFDFWQ-13, and DMTH4008LFDFWQ-7 are parametric equivalents with identical electrical specifications and package specifications. The differences in part numbers reflect internal Diodes Incorporated product line designations. All three parts are active in production and suitable for direct substitution based on availability and lead time.

Q: Is the PMPB14XNX suitable for automotive applications?

A: The PMPB14XNX is not qualified to AEC-Q101 automotive standards based on provided specifications. This part is suitable for non-automotive applications or designs where automotive qualification is not required. For automotive applications, use DMTH4008LFDFW-7, DMTH4008LFDFWQ-13, or DMTH4008LFDFWQ-7.

Q: What compliance certifications apply to all substitute parts?

A: All four parts are ROHS3 compliant, REACH unaffected, and carry unlimited moisture sensitivity rating (MSL 1). The three Diodes Incorporated parts (DMTH4008LFDFW-7, DMTH4008LFDFWQ-13, DMTH4008LFDFWQ-7) are qualified to AEC-Q101 automotive standards. The PMPB14XNX is ROHS3 compliant but does not carry AEC-Q101 qualification.

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