IRLI540N N-Channel MOSFET 100V 23A Equivalent & Substitute Parts

Part Overview

The IRLI540N is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage with 23A continuous drain current at 25°C. This device is packaged in TO-220-3 Full Pack configuration and is designed for through-hole mounting applications. The IRLI540N is classified as an obsolete product, making identification of functionally equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

IRLI540N

Infineon TechnologiesIn Stock: 3688IRLI540N Datasheet

Current PartRFQ

FDP3682

onsemiIn Stock: 15501FDP3682 Datasheet

MFR RecommendedRFQ

IRLI540G

Vishay SiliconixIn Stock: 2796IRLI540G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRLI540N is determined by strict electrical and mechanical parameter compatibility within the N-Channel MOSFET category. The following parameters establish the substitution criteria:

Critical Matching Parameters:

• Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
• FET Type: N-Channel only
• Package Type: TO-220-3 through-hole configuration
• Operating Temperature Range: Must encompass -55°C to 175°C
• Technology: Metal Oxide MOSFET

Performance Parameters for Functional Equivalence:

• Continuous Drain Current (Id): Substitute must support minimum 23A at 25°C
• On-State Resistance (Rds On): Lower or equivalent values indicate improved performance
• Gate Threshold Voltage (Vgs(th)): Must be compatible with existing gate drive circuits
• Gate Charge (Qg): Affects switching speed and drive circuit requirements
• Input Capacitance (Ciss): Influences gate drive current demands

The identified substitute parts meet these criteria while maintaining electrical and mechanical compatibility with the original IRLI540N design.

Parameter Comparison

Engineering Selection Recommendations

IRLI540G (Vishay Siliconix) - Primary Substitute

The IRLI540G is an active product with identical voltage rating (100V Vdss) and compatible gate threshold voltage (2V @ 250µA). Continuous drain current is rated at 17A (Tc), which is lower than the IRLI540N's 23A specification. This device maintains the same operating temperature range (-55°C to 175°C) and TO-220-3 through-hole package configuration. The IRLI540G is suitable for applications where the 17A rating meets system requirements. Product status is Active, ensuring long-term availability. RoHS compliance status is non-compliant, matching the original part's regulatory classification.

FDP3682 (onsemi) - Alternative Substitute

The FDP3682 is an active product with 100V Vdss rating and superior continuous drain current specification of 32A (Tc), exceeding the IRLI540N's 23A rating. This device features lower on-state resistance (36 mOhm @ 32A, 10V) and reduced gate charge (28 nC @ 10V), indicating improved switching efficiency. The FDP3682 operates across the same temperature range (-55°C to 175°C) and uses TO-220-3 through-hole packaging. Gate threshold voltage is specified at 4V @ 250µA, which is higher than the IRLI540N. Maximum gate voltage rating is ±20V, providing greater margin than the IRLI540N's ±16V. This device is ROHS3 Compliant, offering improved regulatory alignment. The FDP3682 is suitable for applications requiring higher current capacity and enhanced thermal performance.

Regulatory and Compliance Considerations

Both substitute parts maintain the same operating temperature range as the original IRLI540N. The IRLI540G preserves the RoHS non-compliant status of the original part, ensuring consistency in legacy system designs. The FDP3682 offers ROHS3 compliance, which may be advantageous for new designs or systems with updated regulatory requirements. Selection between these substitutes should account for application-specific current requirements, thermal management capabilities, and regulatory compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can the IRLI540G directly replace the IRLI540N in all applications?

A: The IRLI540G is electrically compatible with the IRLI540N in applications where continuous drain current does not exceed 17A. Both devices share identical 100V Vdss rating, 2V gate threshold voltage, and TO-220-3 through-hole package configuration. Applications requiring the full 23A continuous current rating of the IRLI540N must use the FDP3682 or verify that the IRLI540G's 17A rating is sufficient for the specific circuit design.

Q: What are the key differences between the IRLI540G and FDP3682 substitutes?

A: The IRLI540G provides 17A continuous drain current with 77 mOhm on-state resistance, while the FDP3682 provides 32A continuous drain current with 36 mOhm on-state resistance. The FDP3682 features lower gate charge (28 nC versus 64 nC) and higher maximum gate voltage (±20V versus ±10V). The FDP3682 is ROHS3 Compliant, whereas the IRLI540G maintains RoHS non-compliant status. Both devices operate across -55°C to 175°C and use TO-220-3 through-hole packaging.

Q: Is the TO-220-3 package identical across all three parts?

A: All three devices use TO-220-3 through-hole packaging suitable for identical PCB footprints. The IRLI540N and IRLI540G both specify TO-220-3 Full Pack configuration. The FDP3682 specifies TO-220-3 standard configuration. Physical pin assignments and mounting hole locations are compatible across all three parts. Thermal tab isolation characteristics may differ; verify specific thermal management requirements for your application.

Q: Which substitute is recommended for new designs?

A: Selection depends on application current requirements and regulatory compliance mandates. For applications requiring 23A or higher continuous current, the FDP3682 is the appropriate choice, offering superior current capacity, lower on-state resistance, and ROHS3 compliance. For applications with current requirements below 17A, the IRLI540G provides an active product with direct electrical compatibility to the original IRLI540N design.

Q: Are there any gate drive circuit compatibility concerns when switching between these parts?

A: Gate threshold voltages differ between substitutes. The IRLI540N and IRLI540G both specify 2V @ 250µA, while the FDP3682 specifies 4V @ 250µA. Gate charge specifications also vary: IRLI540N at 74 nC @ 5V, IRLI540G at 64 nC @ 5V, and FDP3682 at 28 nC @ 10V. Existing gate drive circuits designed for the IRLI540N may require adjustment when using the FDP3682 due to higher threshold voltage and different gate charge characteristics. Verify gate drive voltage and current capabilities against the selected substitute's specifications.

Q: What is the impact of different maximum gate voltage ratings?

A: The IRLI540N specifies ±16V maximum gate voltage, the IRLI540G specifies ±10V, and the FDP3682 specifies ±20V. Gate drive circuits must not exceed these maximum ratings. If the original design applies gate voltages above ±10V, the IRLI540G is not suitable. The FDP3682's ±20V rating provides greater margin for gate drive circuits operating at higher voltages. Verify that your gate drive circuit operates within the selected substitute's maximum gate voltage specification.

Q: How do input capacitance differences affect circuit performance?

A: Input capacitance (Ciss) values are IRLI540N at 1800 pF @ 25V, IRLI540G at 2200 pF @ 25V, and FDP3682 at 1250 pF @ 25V. Higher input capacitance increases gate drive current requirements and may affect switching speed. The FDP3682's lower input capacitance (1250 pF) reduces gate drive current demands compared to the original IRLI540N (1800 pF). The IRLI540G's higher input capacitance (2200 pF) increases gate drive current requirements. Verify that your gate drive circuit can supply the required current for the selected substitute's input capacitance specification.