IRFR3711 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR3711 is an N-Channel power MOSFET manufactured by Infineon Technologies, rated for 20V drain-to-source voltage with 100A continuous drain current. This device is part of the HEXFET® series and is housed in a Surface Mount TO-252-3 (DPAK) package. The IRFR3711 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substitute parts are identified based on matching electrical characteristics within allowable parameter tolerances and mechanical compatibility with the TO-252-3 package footprint.

Substiute Parts

IRFR3711

Infineon TechnologiesIn Stock: 2221IRFR3711 Datasheet

Current PartRFQ

IPD50N03S207ATMA1

Infineon TechnologiesIn Stock: 47685IPD50N03S207ATMA1 Datasheet

MFR RecommendedRFQ

IRFR3711TRLPBF

International RectifierIn Stock: 12294IRFR3711TRLPBF Datasheet

Parametric EquivalentRFQ

STD100N3LF3

STMicroelectronicsIn Stock: 15489STD100N3LF3 Datasheet

MFR RecommendedRFQ

IRFR3711TRLPBF

International RectifierIn Stock: 12294IRFR3711TRLPBF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRFR3711 are classified into two categories based on electrical parameter alignment:

Parametric Equivalent: Parts that maintain identical or near-identical electrical specifications across all critical parameters, including Vdss, Id, Rds On, gate charge, and input capacitance. These parts are direct functional replacements with no circuit redesign required.

Manufacturer Recommended Substitute: Parts that operate within the same voltage and current envelope but may have different secondary characteristics such as gate charge, input capacitance, or thermal performance. These substitutes require verification of application-specific requirements.

Key Parameters for Substitution Eligibility:

• Drain-to-Source Voltage (Vdss): Must equal or exceed 20V
• Continuous Drain Current (Id): Must equal or exceed 100A
• On-State Resistance (Rds On): Must not significantly exceed 6.5mOhm at rated conditions
• Package Type: Must be TO-252-3 (DPAK) Surface Mount
• Gate Voltage Rating (Vgs): Must support ±20V
• Operating Temperature Range: Must support -55°C to 150°C minimum

Parameter Comparison

Engineering Selection Recommendations

IRFR3711TRLPBF (International Rectifier)

This part is a parametric equivalent to the IRFR3711, offering identical electrical specifications across all critical parameters: 20V Vdss, 100A Id, 6.5mOhm Rds On, 44nC gate charge, and 2980pF input capacitance. The IRFR3711TRLPBF maintains the same operating temperature range (-55°C to 150°C) and is housed in the identical TO-252-3 (DPAK) package. Product status is Active, ensuring long-term availability. This part is the preferred direct replacement for the obsolete IRFR3711 in applications requiring no circuit modification.

IPD50N03S207ATMA1 (Infineon Technologies)

This part is a manufacturer-recommended substitute with higher voltage rating (30V Vdss) and reduced current rating (50A Id). The higher voltage rating provides additional design margin in applications where voltage stress is a concern. On-state resistance is 7.3mOhm at 50A, 10V, which is acceptable for lower-current applications. Gate charge increases to 68nC, and input capacitance decreases to 2000pF. Operating temperature range extends to 175°C. This part is RoHS3 compliant and Active in production. Selection of this part requires verification that the 50A current rating is sufficient for the application and that the increased gate charge does not adversely affect gate drive timing.

STD100N3LF3 (STMicroelectronics)

This part is a manufacturer-recommended substitute with 30V Vdss and 80A Id rating. On-state resistance is 5.5mOhm at 40A, 10V, which is superior to the IRFR3711. Gate charge is significantly lower at 27nC, and input capacitance is 2060pF. Operating temperature range extends to 175°C. Product status is Obsolete. RoHS3 compliance is confirmed. Selection of this part requires verification that the 80A current rating meets application requirements and that the lower gate charge is compatible with existing gate drive circuits.

All three substitute parts are housed in the TO-252-3 (DPAK) package and are compatible with existing PCB layouts. Selection between substitutes depends on application-specific requirements for voltage margin, current capacity, gate drive characteristics, and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can IRFR3711TRLPBF be used as a direct replacement for IRFR3711?

A: Yes. IRFR3711TRLPBF is a parametric equivalent with identical electrical specifications. No circuit redesign is required. Both parts have 20V Vdss, 100A Id, 6.5mOhm Rds On, and identical gate charge and input capacitance values. The primary difference is product status: IRFR3711TRLPBF is Active, while IRFR3711 is Obsolete.

Q: Why do IPD50N03S207ATMA1 and STD100N3LF3 have higher voltage ratings than IRFR3711?

A: Higher voltage ratings (30V vs. 20V) provide additional design margin for transient voltage spikes and overvoltage conditions. However, these parts have reduced current ratings (50A and 80A respectively, compared to 100A). Selection depends on whether the application requires the full 100A current capacity or can operate at reduced current levels.

Q: Are all substitute parts compatible with the existing PCB layout?

A: Yes. All substitute parts use the TO-252-3 (DPAK) package with identical pin configuration and footprint. No PCB modifications are required for mechanical compatibility.

Q: What is the impact of different gate charge values on circuit performance?

A: Gate charge affects gate drive timing and power dissipation in the gate drive circuit. IRFR3711TRLPBF has 44nC (identical to IRFR3711), IPD50N03S207ATMA1 has 68nC (higher), and STD100N3LF3 has 27nC (lower). Higher gate charge requires longer switching times and increased gate drive power. Lower gate charge enables faster switching. Verify that existing gate drive circuits can accommodate these differences.

Q: What is the significance of input capacitance differences?

A: Input capacitance (Ciss) affects gate drive circuit impedance and switching speed. IRFR3711 and IRFR3711TRLPBF both have 2980pF. IPD50N03S207ATMA1 has 2000pF (lower), and STD100N3LF3 has 2060pF (lower). Lower input capacitance generally enables faster switching transitions. Verify compatibility with existing gate drive circuit design.

Q: Are there RoHS compliance differences between substitute parts?

A: Yes. IRFR3711 is RoHS non-compliant. IRFR3711TRLPBF has "Not applicable" status. IPD50N03S207ATMA1 and STD100N3LF3 are both ROHS3 compliant. For applications requiring RoHS compliance, IPD50N03S207ATMA1 or STD100N3LF3 must be selected.

Q: Can IPD50N03S207ATMA1 be used in applications requiring 100A continuous current?

A: No. IPD50N03S207ATMA1 is rated for 50A continuous drain current. Using this part in a 100A application would exceed its current rating and cause thermal failure. Current capacity must be verified against application requirements before selection.

Q: What is the operating temperature range difference, and does it matter?

A: IRFR3711 and IRFR3711TRLPBF support -55°C to 150°C. IPD50N03S207ATMA1 and STD100N3LF3 support -55°C to 175°C. The extended upper temperature limit provides additional thermal margin in high-temperature applications. Verify application temperature requirements before selection.