IRLR3103TRL N-Channel MOSFET 30V 55A Equivalent & Substitute Parts

Part Overview

The IRLR3103TRL is an N-Channel MOSFET manufactured by Infineon Technologies, designed for surface mount applications in the TO-252AA (DPAK) package. This device operates at 30V drain-to-source voltage with a continuous drain current rating of 55A at 25°C and maximum power dissipation of 107W. The product is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

IRLR3103TRL

Infineon TechnologiesIn Stock: 4105IRLR3103TRL Datasheet

Current PartRFQ

AOD480

Alpha & Omega Semiconductor Inc.In Stock: 19766AOD480 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRLR3103TRL is determined by strict equivalence across the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Drain to Source Voltage (Vdss): 30V minimum
• Package Type: TO-252 (DPAK) surface mount configuration
• FET Type: N-Channel MOSFET technology
• Operating Temperature Range: -55°C to 175°C minimum

Performance Consideration Parameters:

• Continuous Drain Current (Id): Substitute must meet or exceed 55A at 25°C
• On-State Resistance (Rds On): Substitute performance at specified gate voltage and drain current
• Gate Charge (Qg): Switching characteristics at specified gate voltage
• Power Dissipation: Thermal capability at case temperature

The AOD480 from Alpha & Omega Semiconductor Inc. is identified as a manufacturer-recommended substitute. However, this device exhibits reduced continuous drain current (25A versus 55A) and lower power dissipation (21W Tc versus 107W Tc), indicating application-dependent suitability.

Parameter Comparison

Engineering Selection Recommendations

Electrical Compatibility: The AOD480 maintains voltage rating equivalence (30V Vdss) and identical operating temperature range (-55°C to 175°C). Both devices utilize N-Channel MOSFET technology in TO-252 (DPAK) surface mount packages, ensuring mechanical and thermal interface compatibility.

Current Rating Limitation: The AOD480 continuous drain current rating of 25A is 45% lower than the IRLR3103TRL specification of 55A. Applications requiring sustained drain currents above 25A cannot use this substitute without thermal or circuit redesign.

On-State Resistance: The AOD480 exhibits 23mOhm Rds On at 20A, 10V versus 19mOhm for the IRLR3103TRL at 33A, 10V. At equivalent operating points, on-state resistance differences will affect power dissipation and thermal performance.

Compliance Status: The IRLR3103TRL is RoHS non-compliant and classified as Obsolete. The AOD480 is ROHS3 compliant but designated as Not For New Designs. Both devices carry REACH Unaffected status and EAR99 export classification.

Substitution Applicability: The AOD480 is suitable for applications where continuous drain current does not exceed 25A and thermal dissipation requirements remain within 21W (Tc). Applications exceeding these parameters require alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the AOD480 directly replace the IRLR3103TRL in all applications?

A: No. The AOD480 has a maximum continuous drain current of 25A compared to the IRLR3103TRL's 55A rating. Direct substitution is limited to applications operating at or below 25A continuous drain current. Higher current applications require alternative components or circuit modification.

Q: What are the package compatibility considerations?

A: Both the IRLR3103TRL and AOD480 use the TO-252-3 (DPAK) surface mount package with identical pin configuration (2 leads plus tab). PCB footprints and thermal pad layouts are mechanically compatible. No layout modifications are required for package substitution.

Q: How do the on-state resistance characteristics compare?

A: The IRLR3103TRL specifies 19mOhm Rds On at 33A, 10V gate voltage. The AOD480 specifies 23mOhm at 20A, 10V. At lower operating currents, the AOD480 may exhibit comparable or slightly higher on-state resistance, resulting in increased power dissipation and heat generation.

Q: Are there compliance or regulatory differences between these parts?

A: The IRLR3103TRL is RoHS non-compliant and Obsolete. The AOD480 is ROHS3 compliant but designated Not For New Designs. Both carry identical REACH Unaffected and EAR99 classifications. New designs should evaluate RoHS3-compliant alternatives beyond the AOD480.

Q: What is the gate charge difference and how does it affect circuit performance?

A: The IRLR3103TRL specifies 50nC gate charge at 4.5V, while the AOD480 specifies 14nC at 10V. Lower gate charge in the AOD480 results in faster switching transitions and reduced gate drive power requirements. This difference may improve switching efficiency in high-frequency applications.

Q: Can the AOD480 handle the same power dissipation as the IRLR3103TRL?

A: No. The IRLR3103TRL is rated for 107W maximum power dissipation at case temperature. The AOD480 is rated for 21W (Tc). The AOD480 has significantly lower thermal capacity and cannot sustain equivalent power levels without exceeding maximum junction temperature limits.

Q: What input capacitance differences exist between these devices?

A: The IRLR3103TRL specifies 1600pF input capacitance at 25V, while the AOD480 specifies 820pF at 15V. The lower input capacitance of the AOD480 reduces gate drive current requirements and may improve switching speed in gate-drive-limited circuits.