IRFR3711Z N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR3711Z is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 20V drain-to-source voltage with 93A continuous drain current at 25°C. This device is housed in a TO-252AA (DPAK) surface mount package and is part of the HEXFET® series. The IRFR3711Z is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing production support, design updates, and component sourcing. Substitute parts must maintain electrical compatibility within the specified parameter ranges while accommodating modern product status classifications and compliance requirements.

Substiute Parts

IRFR3711Z

Infineon TechnologiesIn Stock: 50297IRFR3711Z Datasheet

Current PartRFQ

IRFR3711ZTRPBF

Infineon TechnologiesIn Stock: 6124IRFR3711ZTRPBF Datasheet

DirectRFQ

IPD50N03S207ATMA1

Infineon TechnologiesIn Stock: 47685IPD50N03S207ATMA1 Datasheet

MFR RecommendedRFQ

STD100N3LF3

STMicroelectronicsIn Stock: 15489STD100N3LF3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFR3711Z is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel topology must be maintained
• Drain-to-Source Voltage (Vdss): Substitute parts must equal or exceed 20V rating
• Continuous Drain Current (Id): Substitute parts must support the required current level for the application
• On-State Resistance (Rds On): Must be within acceptable limits to prevent thermal runaway and maintain circuit performance
• Gate Threshold Voltage (Vgs(th)): Must be compatible with existing gate drive circuitry
• Operating Temperature Range: Must encompass -55°C to 175°C (TJ)

Mechanical Compatibility Criteria:

• Package Type: TO-252-3 (DPAK) form factor with 2 leads plus tab
• Mounting Type: Surface mount configuration
• Pin configuration: Must be electrically equivalent (Gate, Drain, Source)

Compliance and Status Considerations:

• RoHS compliance status
• Product lifecycle status (Active, Not For New Designs, Obsolete)
• Moisture Sensitivity Level (MSL)

Substitute parts listed below meet these criteria with electrical parameters that maintain or improve upon the original specification while accommodating modern manufacturing and compliance standards.

Parameter Comparison

Engineering Selection Recommendations

IRFR3711ZTRPBF (Infineon Technologies)

This part is an exact electrical equivalent to the IRFR3711Z, maintaining identical electrical specifications including 20V Vdss, 93A continuous drain current, and 5.7mOhm Rds On. The primary difference is packaging format (Tape & Reel versus bulk) and RoHS3 compliance. Product status is classified as "Not For New Designs," indicating limited long-term availability. This substitute is suitable for legacy system maintenance and repair applications where exact electrical matching is required. The ROHS3 compliance status provides improved environmental and regulatory alignment compared to the non-compliant original part.

IPD50N03S207ATMA1 (Infineon Technologies)

This part is rated for 30V Vdss and 50A continuous drain current, representing a higher voltage rating with reduced current capacity compared to the IRFR3711Z. The OptiMOS™ series technology provides superior power dissipation capability (136W versus 79W) and is classified as Active product status, ensuring long-term availability and supply chain stability. This substitute is appropriate for applications where the 20V rating is conservative and higher voltage headroom is beneficial. The higher gate threshold voltage (4.0V versus 2.45V) requires verification of gate drive circuit compatibility. RoHS3 compliance and active product status make this the preferred choice for new designs requiring IRFR3711Z-equivalent functionality.

STD100N3LF3 (STMicroelectronics)

This part is rated for 30V Vdss and 80A continuous drain current, offering higher voltage rating with reduced current capacity. The STripFET™ II series provides 110W power dissipation and maintains Rds On performance (5.5mOhm) comparable to the original part. Product status is Obsolete, limiting future availability. RoHS3 compliance is provided. This substitute is suitable for applications requiring higher voltage margin with moderate current reduction. Gate threshold voltage (2.5V) is closely matched to the original specification, minimizing gate drive circuit modifications.

Frequently Asked Questions (FAQ)

Q: Can IRFR3711ZTRPBF be used as a direct replacement for IRFR3711Z?

A: Yes. IRFR3711ZTRPBF is electrically identical to IRFR3711Z with matching Vdss (20V), Id (93A), Rds On (5.7mOhm), and operating temperature range. The difference is packaging format (Tape & Reel) and improved RoHS3 compliance. Pin configuration and package outline (TO-252-3 DPAK) are identical, enabling direct PCB substitution.

Q: What are the limitations of IPD50N03S207ATMA1 as a substitute?

A: IPD50N03S207ATMA1 has reduced continuous drain current (50A versus 93A) and elevated gate threshold voltage (4.0V versus 2.45V). Applications requiring the full 93A current capacity must not use this part. Gate drive circuits designed for 2.45V threshold may require adjustment for 4.0V operation. The higher Vdss rating (30V) is compatible with 20V-rated circuits but provides additional voltage margin.

Q: Is STD100N3LF3 suitable for high-current applications?

A: STD100N3LF3 supports 80A continuous drain current, which is lower than the IRFR3711Z specification of 93A. Applications requiring sustained current above 80A must not use this substitute. For applications operating below 80A, this part provides acceptable performance with improved power dissipation capability (110W).

Q: What is the impact of higher Vdss ratings in substitute parts?

A: Substitute parts with higher Vdss ratings (30V versus 20V) are electrically compatible with 20V-rated circuits. The higher voltage rating provides additional safety margin and does not degrade circuit performance. No circuit modifications are required. However, the higher Vdss rating typically results in increased on-state resistance and reduced current capacity, which must be evaluated for specific applications.

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

A: Yes. All substitute parts listed are housed in TO-252-3 (DPAK) surface mount packages with identical pin configurations (Gate, Drain, Source). PCB footprints and soldering processes remain unchanged. Packaging format differences (bulk versus Tape & Reel) do not affect electrical or mechanical compatibility.

Q: What is the significance of product status classifications?

A: Product status indicates lifecycle stage and supply availability. Active status (IPD50N03S207ATMA1) ensures long-term manufacturing and supply chain support, making it the preferred choice for new designs. "Not For New Designs" status (IRFR3711ZTRPBF) indicates limited future availability but remains suitable for legacy system support. Obsolete status (IRFR3711Z, STD100N3LF3) indicates discontinued production with uncertain supply.

Q: How does RoHS compliance affect substitution decisions?

A: The original IRFR3711Z is RoHS non-compliant, while all listed substitutes are ROHS3 compliant. For applications subject to RoHS regulations or environmental standards, compliant substitutes are mandatory. For legacy systems without regulatory requirements, non-compliance does not affect electrical performance but may impact supply chain access and future procurement.

Q: Can gate drive circuits designed for IRFR3711Z operate with all substitutes?

A: Gate drive circuits designed for 2.45V threshold voltage (IRFR3711Z) are compatible with IRFR3711ZTRPBF and STD100N3LF3, which have similar threshold voltages (2.45V and 2.5V respectively). IPD50N03S207ATMA1 has elevated threshold voltage (4.0V), requiring gate drive circuit verification to ensure adequate drive voltage margin above 4.0V.