DMN4031SSDQ-13 Equivalent & Substitute Parts

Part Overview

The DMN4031SSDQ-13 is a dual N-channel MOSFET array manufactured by Diodes Incorporated, designed for surface mount applications requiring 40V drain-to-source voltage capability and 5.2A continuous drain current. The device is packaged in an 8-SOIC form factor and is currently in active product status with 1402 units in stock.

Substitute parts become necessary when the primary component experiences extended lead times, inventory constraints, or when design requirements permit operation within the electrical and mechanical parameters of alternative qualified devices. The AO4840 from Alpha & Omega Semiconductor Inc. serves as a manufacturer-recommended substitute, though it carries a "Not For New Designs" status that must be evaluated against project requirements.

Key Parameters

Parameter	Value	Unit	Specification Basis
Configuration	2 N-Channel (Dual)	—	Functional requirement
Drain to Source Voltage (Vdss)	40	V	Maximum voltage rating
Current - Continuous Drain (Id) @ 25°C	5.2	A	Minimum acceptable current
Rds On (Max) @ Id, Vgs	31	mOhm @ 6A, 10V	On-state resistance
Operating Temperature Range	-55 to 150	°C (TJ)	Thermal operating window
Package / Case	8-SOIC (0.154", 3.90mm Width)	—	Mechanical compatibility
Mounting Type	Surface Mount	—	Assembly requirement
RoHS Status	ROHS3 Compliant	—	Regulatory compliance

Substitute Part Grouping Explanation

Substitution eligibility for the DMN4031SSDQ-13 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match or Exceed):

Drain to Source Voltage (Vdss): Minimum 40V
Continuous Drain Current (Id) @ 25°C: Minimum 5.2A
Operating Temperature Range: Must encompass -55°C to 150°C (TJ)
Configuration: Dual N-Channel MOSFET array

Mechanical Parameters (Must Match):

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected

The AO4840 meets all substitution criteria with equivalent voltage rating (40V), higher continuous drain current (6A versus 5.2A), identical package geometry (8-SOIC), and matching compliance certifications. The lower on-state resistance (30mOhm versus 31mOhm) and higher power dissipation capability (2W versus 1.42W) provide operational margin.

Parameter Comparison

Parameter	DMN4031SSDQ-13	AO4840	Unit	Compatibility
Manufacturer	Diodes Incorporated	Alpha & Omega Semiconductor Inc.	—	Different source
Configuration	2 N-Channel (Dual)	2 N-Channel (Dual)	—	Equivalent
Drain to Source Voltage (Vdss)	40	40	V	Equivalent
Current - Continuous Drain (Id) @ 25°C	5.2	6	A	AO4840 exceeds
Rds On (Max) @ Id, Vgs	31 @ 6A, 10V	30 @ 6A, 10V	mOhm	AO4840 lower
Vgs(th) (Max) @ Id	3 @ 250µA	3 @ 250µA	V	Equivalent
Gate Charge (Qg) (Max) @ Vgs	18.6 @ 10V	10.8 @ 10V	nC	AO4840 lower
Input Capacitance (Ciss) (Max) @ Vds	945 @ 20V	650 @ 20V	pF	AO4840 lower
Power - Max	1.42	2	W	AO4840 higher
Operating Temperature Range	-55 to 150	-55 to 150	°C (TJ)	Equivalent
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	—	Equivalent
Mounting Type	Surface Mount	Surface Mount	—	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	—	Equivalent
Product Status	Active	Not For New Designs	—	Different lifecycle

Engineering Selection Recommendations

For Active Production and New Designs: The DMN4031SSDQ-13 is the primary selection. It carries active product status from Diodes Incorporated, ensuring long-term availability and continued manufacturer support. This device is suitable for all new circuit designs and production programs without lifecycle constraints.

For Existing Designs and Inventory Mitigation: The AO4840 is electrically and mechanically compatible with the DMN4031SSDQ-13 and may be used as a substitute in established applications where component availability becomes critical. The AO4840 demonstrates superior electrical characteristics across multiple parameters: lower on-state resistance, reduced gate charge, lower input capacitance, and higher power dissipation capability. These characteristics provide operational margin in existing designs.

Product Status Consideration: The AO4840 carries a "Not For New Designs" designation from Alpha & Omega Semiconductor Inc. This status indicates the manufacturer does not recommend this device for new product development. However, the device remains available in inventory (54200 units) and maintains full compliance with RoHS3 and REACH regulations. Selection of the AO4840 should be limited to applications where the DMN4031SSDQ-13 is unavailable and where design modifications to accommodate the substitute are not feasible.

Compliance and Regulatory: Both devices are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1 - Unlimited). No additional qualification or testing is required from a regulatory standpoint when substituting between these parts in compliant applications.

Frequently Asked Questions (FAQ)

Q: Can the AO4840 be used as a direct replacement for the DMN4031SSDQ-13 on existing PCBs?

A: Yes. Both devices are packaged in 8-SOIC (0.154", 3.90mm Width) form factors with identical pin configurations for dual N-channel MOSFET arrays. No PCB layout modifications are required. The devices are mechanically and electrically interchangeable at the board level.

Q: What are the key electrical differences between these two devices?

A: The AO4840 provides superior performance across several parameters: continuous drain current is rated at 6A versus 5.2A, on-state resistance is 30mOhm versus 31mOhm, gate charge is 10.8nC versus 18.6nC, and input capacitance is 650pF versus 945pF. Maximum power dissipation is 2W versus 1.42W. These differences indicate the AO4840 is optimized for lower switching losses and higher current handling.

Q: Why does the AO4840 have a "Not For New Designs" status?

A: Product status designations reflect manufacturer lifecycle management decisions. The "Not For New Designs" status typically indicates the manufacturer is not actively promoting the device for new applications, though the part remains available and fully functional. This status does not imply technical deficiency or compliance issues.

Q: Are there any thermal or reliability concerns when substituting the AO4840?

A: No. Both devices operate across the identical temperature range (-55°C to 150°C TJ) and carry the same moisture sensitivity level (MSL 1 - Unlimited). The AO4840's higher power dissipation capability (2W versus 1.42W) provides additional thermal margin in applications where the DMN4031SSDQ-13 approaches its power limit.

Q: What packaging options are available for these devices?

A: The DMN4031SSDQ-13 is supplied in Tape & Reel (TR) packaging. The AO4840 is available in Cut Tape (CT) and Digi-Reel® packaging. Both are surface mount 8-SOIC packages. Packaging format selection depends on assembly process requirements and volume.

Q: Are both devices RoHS compliant?

A: Yes. Both the DMN4031SSDQ-13 and AO4840 are ROHS3 compliant and REACH unaffected. They are suitable for applications requiring regulatory compliance with European environmental directives.

Q: Can the AO4840 be used in high-frequency switching applications?

A: The AO4840 demonstrates lower gate charge (10.8nC versus 18.6nC) and lower input capacitance (650pF versus 945pF), which are favorable characteristics for high-frequency switching. These parameters indicate faster switching transitions and reduced switching losses compared to the DMN4031SSDQ-13.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message