NTGS3443T2G P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The NTGS3443T2G is a P-Channel MOSFET manufactured by onsemi, rated for 20V drain-to-source voltage with 2.2A continuous drain current at 25°C. The device is housed in a 6-TSOP surface mount package and dissipates up to 500mW. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, production continuity, and system maintenance.

Substiute Parts

NTGS3443T2G

onsemiIn Stock: 18957NTGS3443T2G Datasheet

Current PartRFQ

FDC640P

onsemiIn Stock: 173046FDC640P Datasheet

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FDC642P

onsemiIn Stock: 65456FDC642P Datasheet

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NTGS3443T1G

onsemiIn Stock: 38432NTGS3443T1G Datasheet

Parametric EquivalentRFQ

DMP2033UVT-7

Diodes IncorporatedIn Stock: 27399DMP2033UVT-7 Datasheet

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MIC94052YC6-TR

Microchip TechnologyIn Stock: 1949MIC94052YC6-TR Datasheet

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SI3443BDV-T1-E3

Vishay SiliconixIn Stock: 35386SI3443BDV-T1-E3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NTGS3443T2G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• FET Type: P-Channel topology
• Drain to Source Voltage (Vdss): Minimum 20V rating
• Continuous Drain Current (Id): Minimum 2.2A at 25°C
• Rds On (Max): Maximum 65mOhm at specified gate voltage
• Gate Threshold Voltage (Vgs(th)): Maximum 1.5V at 250µA
• Operating Temperature Range: -55°C to 150°C (TJ)
• Package Compatibility: SOT-23-6 Thin or TSOT-23-6 footprint

Substitution Categories:

Parametric Equivalent: Parts with identical electrical specifications and package footprint, differing only in product status or manufacturing variant.

Similar Substitute: Parts with equal or superior electrical performance (higher current rating, lower Rds On, or higher power dissipation capability) within the same voltage class and compatible package families, enabling direct functional replacement with potential performance enhancement.

Limited Substitute: Parts with different voltage ratings or package types that may require circuit evaluation or PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitute: NTGS3443T1G

The NTGS3443T1G is the optimal substitute for the obsolete NTGS3443T2G. This part is a parametric equivalent with identical electrical specifications (20V Vdss, 2.2A Id, 65mOhm Rds On, 1.5V Vgs(th), 15nC Qg, 500mW power dissipation) and compatible SOT-23-6/TSOT-23-6 package footprint. The NTGS3443T1G carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. No circuit modification or PCB layout change is required.

Secondary Substitutes for Performance Enhancement:

SI3443BDV-T1-E3 (Vishay Siliconix TrenchFET®): Provides superior performance with 3.6A continuous drain current, 60mOhm Rds On, and 1.1W power dissipation capability. Compatible SOT-23-6/TSOT-23-6 package enables direct PCB substitution. Active product status and ROHS3 compliance confirmed. Suitable for applications requiring higher current handling or reduced thermal dissipation.

FDC640P (onsemi PowerTrench®): Delivers highest current rating at 4.5A with 53mOhm Rds On and 1.6W power dissipation. SuperSOT-6 package maintains mechanical compatibility with standard SOT-23-6 footprints. Active product status and ROHS3 compliance. Recommended for designs requiring maximum current capacity within the 20V class.

FDC642P (onsemi PowerTrench®): Offers 4.0A continuous drain current with 65mOhm Rds On matching the original specification. SuperSOT-6 package compatible with SOT-23-6 footprints. Active product status and ROHS3 compliance. Suitable as alternative to FDC640P when 4.0A current is sufficient.

DMP2033UVT-7 (Diodes Incorporated): Provides 4.2A continuous drain current with 65mOhm Rds On and 1.2W power dissipation. TSOT-26 package maintains SOT-23-6 footprint compatibility. Lower gate threshold voltage (0.9V) and reduced gate charge (10.4nC) enable faster switching. Active product status and ROHS3 compliance. Suitable for high-frequency switching applications.

Not Recommended: MIC94052YC6-TR

The MIC94052YC6-TR operates at 6V Vdss, which is insufficient for 20V circuit applications. Although it maintains P-Channel topology and surface mount packaging, the voltage rating mismatch makes this part unsuitable for direct substitution. This part is listed only for reference and should not be selected for NTGS3443T2G replacement.

Frequently Asked Questions (FAQ)

Q: Can NTGS3443T1G be used as a direct replacement for NTGS3443T2G without circuit modification?

A: Yes. The NTGS3443T1G is a parametric equivalent with identical electrical specifications and compatible package footprint. No circuit modification, PCB layout change, or design validation is required. The primary difference is product status: NTGS3443T1G is Active while NTGS3443T2G is Obsolete.

Q: What is the difference between SOT-23-6 and SuperSOT-6 packages?

A: Both package types maintain the same six-pin footprint and are mechanically compatible with standard SOT-23-6 PCB layouts. SuperSOT-6 is an enhanced variant offering improved thermal performance and lower parasitic inductance. Parts in SuperSOT-6 packaging (FDC640P, FDC642P) can be substituted into SOT-23-6 footprints without PCB modification.

Q: Why is MIC94052YC6-TR listed as a substitute if it cannot be used?

A: MIC94052YC6-TR is included in the comparison table for completeness based on the provided input data. However, its 6V Vdss rating is incompatible with 20V circuit requirements. This part should not be selected for NTGS3443T2G replacement and is provided only for reference to prevent accidental selection.

Q: Can I use FDC640P or SI3443BDV-T1-E3 in place of NTGS3443T2G if my circuit only requires 2.2A?

A: Yes. Both FDC640P (4.5A) and SI3443BDV-T1-E3 (3.6A) exceed the 2.2A requirement and maintain all other critical parameters within specification. Higher current ratings provide design margin and do not degrade circuit performance. These parts are suitable for applications requiring future current expansion or improved thermal characteristics.

Q: What is the significance of gate charge (Qg) differences among substitute parts?

A: Gate charge affects switching speed and driver power consumption. Lower Qg values (DMP2033UVT-7 at 10.4nC, SI3443BDV-T1-E3 at 9nC) enable faster switching transitions compared to the original 15nC specification. This is beneficial in high-frequency switching applications but does not affect DC operating characteristics. Selection should be based on circuit switching frequency requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed (NTGS3443T1G, FDC640P, FDC642P, DMP2033UVT-7, SI3443BDV-T1-E3) are ROHS3 compliant. The original NTGS3443T2G does not specify RoHS status due to its obsolete classification. ROHS3 compliance ensures regulatory alignment for new designs and production continuity.

Q: What is the operating temperature range consideration for substitution?

A: The original NTGS3443T2G and all recommended substitutes operate across -55°C to 150°C (TJ). MIC94052YC6-TR has a narrower range (-40°C to 150°C), making it unsuitable for applications requiring -55°C operation. All other substitutes maintain full temperature range compatibility.

Q: Can package type differences affect PCB assembly?

A: SOT-23-6, TSOT-23-6, SuperSOT-6, and TSOT-26 packages maintain compatible six-pin footprints suitable for standard surface mount assembly equipment. No assembly process modification is required. SC-70-6 (MIC94052YC6-TR) uses a different footprint and is not mechanically compatible.