IPD20N03L G N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IPD20N03L G is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage with 30A continuous drain current. This device is part of the OptiMOS™ series and is packaged in TO-252-3 (DPAK) surface mount configuration. The part is currently classified as obsolete, making identification of functionally equivalent substitutes essential for ongoing design support and production continuity. Substitute parts must maintain compatibility with the original electrical specifications and mechanical package requirements.

Substiute Parts

IPD20N03L G

Infineon TechnologiesIn Stock: 1680IPD20N03L G Datasheet

Current PartRFQ

RFD12N06RLESM9A

onsemiIn Stock: 7401RFD12N06RLESM9A Datasheet

MFR RecommendedRFQ

STD17NF03LT4

STMicroelectronicsIn Stock: 8802STD17NF03LT4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IPD20N03L G is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Drain-to-Source Voltage (Vdss) must be equal to or greater than 30V
• Continuous Drain Current (Id) must be equal to or greater than 30A at 25°C
• On-State Resistance (Rds On) must not exceed the original specification to maintain thermal performance
• Package type must be TO-252-3 (DPAK) or mechanically compatible surface mount variant
• Operating temperature range must encompass -55°C to 175°C

Identified Substitute Parts:

The RFD12N06RLESM9A (onsemi UltraFET™) does not meet the primary substitution criteria. Although it features a higher Vdss rating (60V), its continuous drain current is limited to 18A, which falls below the required 30A specification. This part is unsuitable for direct substitution in applications requiring the full 30A current rating.

The STD17NF03LT4 (STMicroelectronics STripFET™ II) maintains the same 30V Vdss rating and operates within the required temperature range. However, its continuous drain current rating of 17A is insufficient to replace the 30A capability of the original part. This device is not a functional equivalent for applications requiring full current capacity.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility Assessment:

Neither of the listed substitute parts meets the complete electrical specification requirements for direct replacement of the IPD20N03L G.

RFD12N06RLESM9A Analysis: This part is active and ROHS3 compliant with superior moisture sensitivity characteristics (MSL 1 vs. MSL 3). However, the 18A continuous drain current rating represents a 40% reduction from the original 30A specification. Applications requiring the full 30A current capacity cannot use this substitute without circuit redesign or parallel device configuration.

STD17NF03LT4 Analysis: This part maintains the 30V Vdss rating and is active with ROHS3 compliance and MSL 1 rating. The 17A continuous drain current represents a 43% reduction from the original 30A specification. The lower power dissipation rating (30W vs. 42W) further restricts its application scope. This device is unsuitable for designs requiring the original current capacity.

Compliance Considerations: Both substitute parts offer improved environmental compliance (ROHS3 Compliant, MSL 1) compared to the original obsolete part. However, compliance improvement does not override electrical specification deficiencies.

Frequently Asked Questions (FAQ)

Q: Can the RFD12N06RLESM9A replace the IPD20N03L G in all applications?

A: No. The RFD12N06RLESM9A is rated for 18A continuous drain current, which is insufficient for applications requiring the original 30A specification. Although it features a higher voltage rating (60V), current capacity is the limiting factor for substitution.

Q: What is the primary reason these substitutes are not direct equivalents?

A: The IPD20N03L G is specified for 30A continuous drain current. Both substitute parts have significantly lower current ratings (18A and 17A respectively), making them unsuitable for applications requiring full current capacity without circuit modification.

Q: Are the substitute parts mechanically compatible with the original package?

A: Both substitute parts use TO-252-3 or DPAK variants, which are mechanically compatible surface mount packages. However, mechanical compatibility does not compensate for electrical specification deficiencies.

Q: What are the compliance advantages of the substitute parts?

A: Both RFD12N06RLESM9A and STD17NF03LT4 are ROHS3 compliant and feature MSL 1 rating (unlimited moisture exposure), compared to the original part's MSL 3 rating (168 hours). These improvements support modern manufacturing and storage requirements.

Q: Can two substitute parts be used in parallel to achieve the required 30A current?

A: Parallel configuration of MOSFETs requires careful circuit design consideration including gate drive matching, current sharing networks, and thermal management. This approach falls outside the scope of direct substitution and requires full circuit re-evaluation.

Q: What is the operating temperature compatibility?

A: All three parts (original and substitutes) support the -55°C to 175°C operating temperature range, ensuring thermal envelope compatibility.

Q: How does on-state resistance affect substitution suitability?

A: The original part specifies 20mOhm Rds On at 15A, 10V. The RFD12N06RLESM9A exhibits 63mOhm at 18A, 10V, representing significantly higher conduction losses. The STD17NF03LT4 shows 50mOhm at 8.5A, 10V. Higher Rds On values increase power dissipation and heat generation, affecting thermal performance in the application circuit.