DMNH4011SK3Q-13 Equivalent & Substitute Parts

Part Overview

The DMNH4011SK3Q-13 is an N-Channel MOSFET manufactured by Diodes Incorporated, rated for 40V drain-to-source voltage with 50A continuous drain current at 25°C. This device is housed in a TO-252-3 (DPAK) surface mount package and is qualified to AEC-Q101 automotive standards. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining package compatibility and operational requirements. Alternative devices may be necessary due to inventory availability, supply chain considerations, or design optimization for specific application requirements.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	40	V
Continuous Drain Current (Id) @ 25°C	50	A (Tc)
On-Resistance (Rds On) @ 50A, 10V	10	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	V
Gate Charge (Qg) @ 10V	25.5	nC
Input Capacitance (Ciss) @ 20V	1405	pF
Power Dissipation (Max)	2.6	W (Ta)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	Surface Mount
Qualification Standard	AEC-Q101	Automotive

Substitute Part Grouping Explanation

Substitution eligibility for the DMNH4011SK3Q-13 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss) must equal or exceed 40V
Continuous Drain Current (Id) must meet or exceed 50A at 25°C
On-Resistance (Rds On) must not exceed 10mOhm at the specified current and gate voltage
Gate Threshold Voltage (Vgs(th)) must be compatible with 4V specification
Operating temperature range must encompass -55°C to 175°C

Package Compatibility Requirements:

Surface mount TO-252-3 (DPAK) package configuration
Pin configuration compatible with 2 leads plus tab design

Compliance Requirements:

ROHS3 compliance status
Active product status in current production

The substitute parts listed below satisfy these criteria within the allowed parameter tolerances for direct circuit board replacement without design modification.

Parameter Comparison

Parameter	DMNH4011SK3Q-13 (Diodes)	FDD8445 (onsemi)	FDD8447L (Fairchild)	Unit
Manufacturer	Diodes Incorporated	onsemi	Fairchild Semiconductor	—
Drain-to-Source Voltage (Vdss)	40	40	40	V
Continuous Drain Current (Id) @ 25°C	50 (Tc)	70 (Tc)	50 (Tc)	A
Rds On (Max) @ 10V	10 @ 50A	8.7 @ 50A	8.5 @ 14A	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	4	4	3	V
Gate Charge (Qg) @ 10V	25.5	59	52	nC
Input Capacitance (Ciss) @ 20V	1405	4050 @ 25V	1970 @ 20V	pF
Power Dissipation (Max)	2.6 (Ta)	79 (Tc)	44 (Tc)	W
Operating Temperature Range	-55 to 175	-55 to 175	-55 to 150	°C (TJ)
Package Type	TO-252-3 (DPAK)	TO-252AA	TO-252 (DPAK)	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	—
Product Status	Active	Active	Active	—

Engineering Selection Recommendations

FDD8445 (onsemi): This substitute provides superior electrical performance with 70A continuous drain current capability and reduced on-resistance of 8.7mOhm at 50A, 10V. The device maintains 40V Vdss rating and operates across the full -55°C to 175°C temperature range. ROHS3 compliance and active production status confirm suitability for direct replacement. Higher gate charge (59nC) and input capacitance (4050pF) may affect switching characteristics in high-frequency applications. TO-252AA package maintains mechanical compatibility with TO-252-3 footprint.

FDD8447L (Fairchild Semiconductor): This substitute meets the 50A continuous drain current requirement with 8.5mOhm on-resistance at 14A, 10V. The device is rated for 40V Vdss and operates within -55°C to 150°C range, providing 25°C margin reduction at the upper temperature limit compared to the primary part. Gate threshold voltage is specified at 3V, which is 1V lower than the primary device. Gate charge (52nC) and input capacitance (1970pF) are intermediate values. Active production status confirms availability. RoHS compliance status is not specified in provided data.

Both substitute parts maintain TO-252 (DPAK) package configuration and are qualified as active production devices. Selection between substitutes depends on specific application requirements regarding thermal performance, switching speed, and temperature operating margin.

Frequently Asked Questions (FAQ)

Q: Can the FDD8445 be used as a direct replacement for the DMNH4011SK3Q-13?

A: Yes. The FDD8445 meets all critical electrical parameters: 40V Vdss, 70A continuous drain current (exceeds 50A requirement), 8.7mOhm on-resistance (better than 10mOhm specification), and -55°C to 175°C operating range. Package compatibility is maintained with TO-252AA configuration. ROHS3 compliance and active production status confirm substitution eligibility.

Q: What is the difference in gate charge between the primary part and substitutes?

A: The DMNH4011SK3Q-13 specifies 25.5nC gate charge at 10V. The FDD8445 requires 59nC and the FDD8447L requires 52nC. Higher gate charge increases switching time and driver power requirements. Applications with high switching frequency or current-limited gate drivers may experience performance differences.

Q: Are there temperature operating range differences between these parts?

A: The DMNH4011SK3Q-13 and FDD8445 both operate from -55°C to 175°C. The FDD8447L operates from -55°C to 150°C, providing 25°C less margin at the upper temperature limit. Thermal design calculations must account for this difference in applications approaching maximum junction temperature.

Q: Do all three parts use the same package footprint?

A: All three devices use TO-252 (DPAK) surface mount packages with 2 leads plus tab configuration. The DMNH4011SK3Q-13 specifies TO-252-3, the FDD8445 specifies TO-252AA, and the FDD8447L specifies TO-252 (DPAK). These designations refer to the same physical package with compatible PCB footprints.

Q: What is the significance of the lower gate threshold voltage in the FDD8447L?

A: The FDD8447L specifies 3V gate threshold voltage compared to 4V for the primary part. This 1V difference affects gate drive requirements and switching behavior. Gate drivers must provide sufficient voltage margin above the threshold to ensure full device enhancement. Applications with marginal gate drive voltage may experience different switching characteristics.

Q: Which substitute offers the best on-resistance performance?

A: The FDD8447L provides the lowest on-resistance at 8.5mOhm (measured at 14A, 10V), followed by the FDD8445 at 8.7mOhm (measured at 50A, 10V). Lower on-resistance reduces conduction losses and heat dissipation. The primary part specifies 10mOhm at 50A, 10V. On-resistance values are measured at different current levels; direct comparison requires normalization to identical test conditions.

Q: Are all parts RoHS compliant?

A: The DMNH4011SK3Q-13 and FDD8445 are confirmed ROHS3 compliant. The FDD8447L RoHS compliance status is not specified in the provided technical data. Verification with the manufacturer is required for applications with RoHS compliance requirements.

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