IRF3610STRLPBF Equivalent & Substitute Parts

Part Overview

The IRF3610STRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage with 103A continuous drain current at 25°C. This device is part of the HEXFET® series and is supplied in Surface Mount packaging (TO-263-3, D2PAK format) on tape and reel. The part maintains Active product status and is fully RoHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining the same package form factor and mounting technology. Substitution becomes necessary due to inventory availability, supply chain considerations, or design flexibility requirements.

Substiute Parts

IRF3610STRLPBF

Infineon TechnologiesIn Stock: 1399IRF3610STRLPBF Datasheet

Current PartRFQ

HUFA75645S3S

Fairchild SemiconductorIn Stock: 1743HUFA75645S3S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRF3610STRLPBF is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain a Drain-to-Source Voltage (Vdss) rating of 100V or greater to ensure safe operation within the same circuit topology.

Current Handling Capacity: The substitute part must support continuous drain current (Id) at or above the application requirement. The IRF3610STRLPBF specifies 103A at 25°C; substitute parts with lower current ratings may be acceptable only if the application circuit operates below the substitute part's rated current.

On-State Resistance (Rds On): This parameter directly affects power dissipation and thermal performance. Substitute parts with higher Rds On values will generate increased heat and may require thermal management adjustments.

Package and Mounting: The substitute part must use identical or mechanically compatible Surface Mount packaging (TO-263-3, D2PAK format) to ensure PCB footprint compatibility without redesign.

Gate Charge and Input Capacitance: These parameters influence switching speed and gate drive requirements. Variations in these values may affect circuit performance in high-frequency applications.

Compliance and Product Status: Both the main part and substitute must maintain Active product status and comply with applicable regulatory standards (RoHS3, REACH).

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (IRF3610STRLPBF): The IRF3610STRLPBF is the specified component and should be used when available. This part offers the lowest on-state resistance (11.6 mOhm) and lowest gate charge (150 nC), resulting in optimal switching performance and minimal power dissipation. Full RoHS3 compliance and REACH unaffected status confirm regulatory alignment. Active product status ensures long-term availability and supply chain stability.

Substitute Selection (HUFA75645S3S): The HUFA75645S3S from Fairchild Semiconductor is electrically compatible for applications where continuous drain current requirements do not exceed 75A. This part maintains the same 100V voltage rating and identical gate threshold voltage (4V @ 250µA). Both devices use compatible TO-263 (D2PAK) Surface Mount packaging without PCB redesign.

Current Derating Consideration: The HUFA75645S3S is rated for 75A continuous drain current, compared to 103A for the IRF3610STRLPBF. Substitution is valid only when circuit design ensures actual drain current remains below 75A under all operating conditions, including transient events and thermal stress scenarios.

On-State Resistance Impact: The HUFA75645S3S exhibits higher on-state resistance (14 mOhm versus 11.6 mOhm). This 20.7% increase results in proportionally higher power dissipation at equivalent current levels. Thermal management design must account for this difference to maintain junction temperature within specified limits (-55°C to 175°C operating range).

Switching Characteristics: The HUFA75645S3S demonstrates higher gate charge (238 nC @ 20V versus 150 nC @ 10V) and lower input capacitance (3790 pF versus 5380 pF). These differences may affect gate drive circuit performance in high-frequency switching applications. Gate drive voltage and current capability must be verified for compatibility.

Compliance Status: The IRF3610STRLPBF provides explicit RoHS3 compliance certification. The HUFA75645S3S compliance status is not specified in available documentation. Applications requiring documented RoHS3 compliance should prioritize the IRF3610STRLPBF.

Frequently Asked Questions (FAQ)

Q: Can HUFA75645S3S directly replace IRF3610STRLPBF without circuit modification?

A: Direct replacement is possible only if the application circuit operates with continuous drain current below 75A. The identical 100V voltage rating and TO-263 (D2PAK) package enable mechanical and electrical compatibility. However, the higher on-state resistance (14 mOhm versus 11.6 mOhm) will increase power dissipation. Thermal analysis must confirm that junction temperature remains within the -55°C to 175°C operating range under worst-case conditions.

Q: What is the impact of higher gate charge in the HUFA75645S3S?

A: The HUFA75645S3S specifies 238 nC gate charge at 20V Vgs, compared to 150 nC at 10V Vgs for the IRF3610STRLPBF. Higher gate charge requires greater charge delivery from the gate drive circuit, potentially increasing switching losses and extending switching time. Gate drive circuits must provide sufficient current capacity to meet the substitute part's charge requirements within the required switching frequency.

Q: Are the package footprints identical between these two parts?

A: Both parts use TO-263 (D2PAK) Surface Mount packaging with 2 leads plus tab configuration. The mechanical footprint is compatible, and PCB redesign is not required for substitution. However, thermal pad design and copper area allocation should be reviewed, as the HUFA75645S3S may require enhanced thermal management due to higher on-state resistance.

Q: What is the significance of the lower input capacitance in HUFA75645S3S?

A: The HUFA75645S3S exhibits lower input capacitance (3790 pF @ 25V Vds versus 5380 pF @ 25V Vds). Lower input capacitance reduces the charge required to drive the gate and may improve switching speed. This characteristic can be advantageous in high-frequency applications but does not affect DC operating point or steady-state performance.

Q: Does RoHS3 compliance status affect substitution eligibility?

A: The IRF3610STRLPBF carries explicit RoHS3 compliance certification. The HUFA75645S3S compliance status is not documented in the provided specifications. Applications subject to RoHS3 regulatory requirements must use the IRF3610STRLPBF or obtain formal compliance documentation for the substitute part from the manufacturer.

Q: What current derating should be applied when using HUFA75645S3S?

A: The HUFA75645S3S is rated for 75A continuous drain current at 25°C. Circuit design must ensure that actual drain current, including all transient conditions and thermal stress scenarios, remains below this limit. Derating curves provided in the device datasheet should be consulted for operation at elevated junction temperatures.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: Interchangeability in high-frequency applications requires careful evaluation of gate charge, input capacitance, and switching time specifications. The HUFA75645S3S exhibits different gate charge and capacitance characteristics, which may affect switching losses and EMI performance. Gate drive circuit design and thermal management must be validated for the substitute part before deployment in frequency-sensitive applications.