DMN3031LSS-13 Equivalent & Substitute Parts

Part Overview

The DMN3031LSS-13 is an N-Channel 30V 9A MOSFET manufactured by Diodes Incorporated in an 8-SOP surface mount package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing production and maintenance applications. The part delivers 2.5W maximum power dissipation and operates across the industrial temperature range of -55°C to 150°C. Due to its obsolete status, active alternative components with compatible electrical and mechanical specifications are required for design continuity and supply chain management.

Substiute Parts

DMN3031LSS-13

Diodes IncorporatedIn Stock: 2220DMN3031LSS-13 Datasheet

Current PartRFQ

DMN3030LSS-13

Diodes IncorporatedIn Stock: 35054DMN3030LSS-13 Datasheet

DirectRFQ

FDS6612A

Fairchild SemiconductorIn Stock: 67646FDS6612A Datasheet

MFR RecommendedRFQ

SI4178DY-T1-GE3

Vishay SiliconixIn Stock: 65233SI4178DY-T1-GE3 Datasheet

MFR RecommendedRFQ

STS10N3LH5

STMicroelectronicsIn Stock: 15344STS10N3LH5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DMN3031LSS-13 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Drain to Source Voltage (Vdss): 30V minimum
• Continuous Drain Current (Id): 9A or greater at 25°C
• Package Type: 8-SOIC surface mount configuration
• Operating Temperature Range: -55°C to 150°C
• RoHS Compliance: ROHS3 Compliant
• Mounting Type: Surface Mount

Secondary Compatibility Parameters:

• Rds On (Max): 18.5 mOhm or lower at rated current and gate voltage
• Gate Threshold Voltage (Vgs(th)): Within ±0.5V of 2.1V
• Power Dissipation: 2.5W or greater
• Gate Charge (Qg): Lower values indicate improved switching performance
• Input Capacitance (Ciss): Lower values reduce drive requirements

The identified substitute parts meet or exceed the primary electrical specifications while maintaining identical package geometry and surface mount compatibility. All substitutes are active products with confirmed inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: DMN3030LSS-13

The DMN3030LSS-13 from Diodes Incorporated is the direct successor to the obsolete DMN3031LSS-13. This part maintains identical electrical specifications with marginally improved Rds On performance (18 mOhm versus 18.5 mOhm) and expanded gate voltage rating (±25V versus ±20V). The part is active in production with 35,000 units in stock. ROHS3 compliance and MSL 1 rating are confirmed. This substitute requires no circuit redesign and provides the highest compatibility for direct replacement applications.

Secondary Recommendation: SI4178DY-T1-GE3

The SI4178DY-T1-GE3 from Vishay Siliconix (TrenchFET® series) exceeds the current specification at 12A continuous drain current and delivers superior switching characteristics with reduced gate charge (12 nC) and input capacitance (405 pF). Power dissipation is rated at 2.4W (Ta) and 5W (Tc), providing thermal margin. The part is active with 65,200 units available. ROHS3 compliance is confirmed. This substitute is suitable for applications where improved performance and thermal headroom are beneficial.

Tertiary Recommendation: FDS6612A

The FDS6612A from Fairchild Semiconductor (PowerTrench® series) provides 8.4A continuous drain current with 30V Vdss rating. Gate charge is significantly reduced to 7.6 nC at 5V, and input capacitance is 560 pF. The part is active with 67,600 units in stock. This substitute is appropriate for applications where lower gate drive requirements and reduced switching losses are prioritized, though continuous current is slightly below the original specification.

Not Recommended for New Designs: STS10N3LH5

The STS10N3LH5 from STMicroelectronics (STripFET™ V series) is classified as "Not For New Designs" and should be used only for legacy system maintenance. While the part meets electrical specifications with 10A continuous current and 30V Vdss, its obsolescence trajectory makes it unsuitable for new product development. ROHS3 compliance and MSL 1 rating are confirmed.

Frequently Asked Questions (FAQ)

Q: Can the DMN3031LSS-13 be directly replaced with the DMN3030LSS-13?

A: Yes. The DMN3030LSS-13 is the direct active successor with identical electrical specifications and package geometry. No circuit modifications are required. The DMN3030LSS-13 features improved Rds On performance and expanded gate voltage rating, making it a superior direct replacement.

Q: What is the primary difference between the DMN3031LSS-13 and SI4178DY-T1-GE3?

A: The SI4178DY-T1-GE3 provides higher continuous drain current (12A versus 9A) and significantly lower gate charge (12 nC versus 25 nC) and input capacitance (405 pF versus 741 pF). These characteristics reduce switching losses and gate drive requirements. Both parts operate at 30V Vdss and -55°C to 150°C temperature range.

Q: Is the FDS6612A suitable as a substitute if continuous current is critical?

A: The FDS6612A provides 8.4A continuous drain current, which is below the original 9A specification. This part is suitable only for applications where the actual circuit current demand is 8.4A or lower. For applications requiring the full 9A specification, the DMN3030LSS-13 or SI4178DY-T1-GE3 are preferred.

Q: Are all substitute parts RoHS3 compliant?

A: The DMN3030LSS-13, SI4178DY-T1-GE3, and STS10N3LH5 are confirmed ROHS3 compliant. The FDS6612A RoHS status is not specified in the provided data. Verification with the manufacturer is required if RoHS3 compliance is a mandatory requirement.

Q: Can the STS10N3LH5 be used in new product designs?

A: No. The STS10N3LH5 is classified as "Not For New Designs" by STMicroelectronics. This part should be reserved for maintenance and repair of existing systems only. For new designs, select from the DMN3030LSS-13, SI4178DY-T1-GE3, or FDS6612A.

Q: What is the significance of the different gate threshold voltage values among substitutes?

A: Gate threshold voltage (Vgs(th)) determines the gate voltage required to initiate conduction. The DMN3031LSS-13 and DMN3030LSS-13 specify 2.1V, while the FDS6612A specifies 3.0V and the STS10N3LH5 specifies 1.0V. These differences affect gate drive circuit design. Substitutes with significantly different Vgs(th) values may require gate drive circuit verification to ensure proper switching performance.

Q: How do gate charge and input capacitance differences affect circuit performance?

A: Lower gate charge (Qg) and input capacitance (Ciss) reduce the energy required to switch the MOSFET and decrease gate drive circuit complexity. The SI4178DY-T1-GE3 and FDS6612A exhibit substantially lower values than the original part, resulting in reduced switching losses and improved efficiency in high-frequency applications. Circuit verification is recommended when substituting parts with significantly different capacitive characteristics.

Q: Are all substitute parts available in the same package configuration?

A: Yes. All substitute parts are packaged in 8-SOIC (0.154", 3.90mm Width) surface mount configuration, identical to the DMN3031LSS-13. PCB layout and footprint modifications are not required for any of these substitutes.

Q: What inventory levels should be considered when selecting a substitute?

A: The DMN3030LSS-13 (35,000 pcs), SI4178DY-T1-GE3 (65,200 pcs), and FDS6612A (67,600 pcs) all maintain substantial inventory levels suitable for production applications. The STS10N3LH5 (15,265 pcs) has lower availability. For long-term supply chain security, the DMN3030LSS-13 is the recommended choice due to its direct lineage and active status.