IRL540NSPBF N-Channel MOSFET 100V 36A Equivalent & Substitute Parts

Part Overview

The IRL540NSPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage with 36A continuous drain current in a D2PAK surface mount package. This device is classified as discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

The IRL540NSPBF belongs to the HEXFET® series and is designed for applications requiring moderate to high current switching at 100V operating levels. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, gate drive characteristics, and thermal performance while supporting the same D2PAK package footprint.

Substiute Parts

IRL540NSPBF

Infineon TechnologiesIn Stock: 14333IRL540NSPBF Datasheet

Current PartRFQ

IRL540SPBF

Vishay SiliconixIn Stock: 1205IRL540SPBF Datasheet

MFR RecommendedRFQ

IRL540STRLPBF

Vishay SiliconixIn Stock: 1144IRL540STRLPBF Datasheet

MFR RecommendedRFQ

STB30NF10T4

STMicroelectronicsIn Stock: 16189STB30NF10T4 Datasheet

MFR RecommendedRFQ

STB40NF10LT4

STMicroelectronicsIn Stock: 1620STB40NF10LT4 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRL540NSPBF is determined by strict electrical and mechanical compatibility across the following criteria:

Mandatory Matching Parameters:

• Drain-to-Source Voltage (Vdss): 100V minimum
• Package Type: D2PAK (TO-263-3) surface mount
• Mounting Type: Surface mount
• Operating Temperature Range: -55°C to 175°C or wider
• RoHS3 Compliance and MSL Level 1

Functional Compatibility Parameters:

• Continuous Drain Current (Id): 28A or higher (substitute must support applications rated for 36A or provide equivalent thermal performance)
• On-State Resistance (Rds On): Lower or equivalent values ensure compatible switching losses
• Gate Charge (Qg): Lower values reduce gate drive power requirements
• Gate Threshold Voltage (Vgs(th)): 2V to 4V range maintains standard gate drive compatibility
• Maximum Gate Voltage (Vgs): ±10V or higher ensures safe operation with standard gate drivers

Thermal Performance:

• Power Dissipation (Tc): 115W or higher supports equivalent thermal management

Substitute parts are grouped into three categories based on current rating alignment and thermal characteristics relative to the IRL540NSPBF baseline.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

IRL540SPBF and IRL540STRLPBF (Vishay Siliconix): These parts share the IRL540 base product number and maintain 100V Vdss with D2PAK packaging. Both are active products with ROHS3 compliance and MSL Level 1. The continuous drain current is rated at 28A, which is lower than the original 36A specification. These substitutes are suitable for applications where the 36A rating is not fully utilized or where thermal management can accommodate the higher Rds On value (77mOhm vs. 44mOhm). The primary difference between IRL540SPBF and IRL540STRLPBF is packaging format: tube versus tape & reel. Both maintain identical electrical specifications.

STB30NF10T4 (STMicroelectronics): This STripFET™ II series device provides 35A continuous drain current, closely matching the original 36A specification. It operates at 100V Vdss in D2PAK packaging with active product status and ROHS3 compliance. The Rds On is 45mOhm at 15A/10V, comparable to the original 44mOhm specification. Gate threshold voltage is 4V, which is higher than the original 2V but remains within standard gate drive ranges. Power dissipation at Tc is 115W, lower than the original 140W, requiring verification for thermal-limited applications.

Secondary Substitute (Higher Current Rating):

STB40NF10LT4 (STMicroelectronics): This device provides 40A continuous drain current, exceeding the original 36A specification. It maintains 100V Vdss in D2PAK packaging with active product status and ROHS3 compliance. The Rds On is 33mOhm at 20A/10V, significantly lower than the original 44mOhm, resulting in reduced switching losses. Operating temperature range extends to -65°C, providing wider environmental coverage. Power dissipation at Tc is 150W, matching the original specification. This substitute is suitable for applications requiring improved thermal performance or higher current headroom.

Selection Criteria:

• For direct current replacement: STB30NF10T4 provides the closest current rating match (35A vs. 36A) with comparable Rds On performance.
• For improved thermal performance: STB40NF10LT4 offers lower Rds On (33mOhm) and higher power dissipation rating (150W), reducing junction temperature in high-frequency switching applications.
• For cost-optimized procurement: IRL540SPBF or IRL540STRLPBF maintain the same base product family with active availability, though current rating is reduced to 28A.

All recommended substitutes maintain D2PAK packaging compatibility, 100V Vdss rating, ROHS3 compliance, and MSL Level 1 moisture sensitivity, ensuring mechanical and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can IRL540SPBF or IRL540STRLPBF be used as direct replacements for IRL540NSPBF?

A: IRL540SPBF and IRL540STRLPBF are electrically compatible substitutes with identical 100V Vdss and D2PAK packaging. However, the continuous drain current is rated at 28A compared to the original 36A. These substitutes are suitable if the application does not require the full 36A current capacity or if thermal management can accommodate the higher Rds On value (77mOhm vs. 44mOhm). Verify that the application's maximum current demand does not exceed 28A before selection.

Q: What is the difference between IRL540SPBF and IRL540STRLPBF?

A: Both parts are electrically identical with the same electrical specifications. The difference is packaging format: IRL540SPBF is supplied in tube packaging, while IRL540STRLPBF is supplied in tape & reel format. Selection depends on assembly line requirements and procurement volume. Both maintain active product status and ROHS3 compliance.

Q: Is STB30NF10T4 a suitable replacement for IRL540NSPBF?

A: STB30NF10T4 is a suitable substitute with 35A continuous drain current, closely matching the original 36A specification. It maintains 100V Vdss, D2PAK packaging, and ROHS3 compliance. The Rds On is 45mOhm, comparable to the original 44mOhm. Gate threshold voltage is 4V versus the original 2V; verify that the gate driver can accommodate this higher threshold. Power dissipation at Tc is 115W, lower than the original 140W; confirm thermal management is adequate for the application.

Q: When should STB40NF10LT4 be selected over other substitutes?

A: STB40NF10LT4 should be selected when improved thermal performance or higher current headroom is required. It provides 40A continuous drain current (exceeding the original 36A), lower Rds On (33mOhm vs. 44mOhm), and higher power dissipation rating (150W). This substitute reduces switching losses and junction temperature in high-frequency applications. Operating temperature range extends to -65°C, providing wider environmental coverage than the original -55°C minimum.

Q: Are all substitute parts RoHS3 compliant and MSL Level 1?

A: Yes. All recommended substitute parts—IRL540SPBF, IRL540STRLPBF, STB30NF10T4, and STB40NF10LT4—are ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity). This ensures compatibility with modern manufacturing processes and environmental regulations.

Q: What is the impact of different Rds On values on circuit performance?

A: On-state resistance (Rds On) directly affects conduction losses and junction temperature. Lower Rds On values reduce power dissipation during switching. IRL540SPBF and IRL540STRLPBF have higher Rds On (77mOhm) compared to the original (44mOhm), increasing conduction losses by approximately 75%. STB30NF10T4 (45mOhm) and STB40NF10LT4 (33mOhm) provide comparable or improved performance. For applications with high switching frequency or continuous high current, lower Rds On values are preferred to minimize thermal stress.

Q: Can gate drive circuits designed for 2V threshold voltage operate with STB30NF10T4 (4V threshold)?

A: STB30NF10T4 has a gate threshold voltage of 4V compared to the original 2V. Standard gate drivers operating at 5V or 10V logic levels will still turn on the device, but the gate-to-source voltage margin is reduced. Verify that the gate driver provides sufficient voltage above the 4V threshold to ensure reliable switching. For applications with marginal gate drive voltage, select IRL540SPBF, IRL540STRLPBF, or STB40NF10LT4, which maintain lower threshold voltages (2V to 2.5V).

Q: What packaging considerations apply when switching from IRL540NSPBF to substitute parts?

A: All recommended substitutes use D2PAK (TO-263-3) surface mount packaging, identical to the original IRL540NSPBF. PCB footprints, thermal vias, and mounting procedures remain unchanged. No layout modifications are required for mechanical compatibility. Verify that the thermal pad connection and copper area for heat dissipation are adequate for the selected substitute's power dissipation rating.

Q: Are there any gate charge differences that affect circuit design?

A: Gate charge (Qg) varies among substitutes: IRL540NSPBF (74nC @ 5V), IRL540SPBF/IRL540STRLPBF (64nC @ 5V), STB30NF10T4 (55nC @ 10V), and STB40NF10LT4 (64nC @ 4.5V). Lower gate charge reduces gate drive power requirements and switching time. STB30NF10T4 has the lowest gate charge (55nC), improving switching speed. For applications with limited gate drive current, lower gate charge values are advantageous. Verify that the gate driver can supply sufficient current to charge the gate within the required switching time.