IRFR5505 P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR5505 is a P-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 18A continuous drain current at 25°C. This device is packaged in TO-252-3 (DPAK) surface mount configuration and is classified as obsolete. Due to its obsolete status, equivalent substitute parts with compatible electrical and mechanical specifications are necessary for ongoing design support and production continuity. Substitute devices maintain functional compatibility through matching or exceeding key electrical parameters while utilizing the same surface mount package format.

Substiute Parts

IRFR5505

Infineon TechnologiesIn Stock: 30119IRFR5505 Datasheet

Current PartRFQ

SPD18P06PGBTMA1

Infineon TechnologiesIn Stock: 20783SPD18P06PGBTMA1 Datasheet

MFR RecommendedRFQ

DMP6185SK3-13

Diodes IncorporatedIn Stock: 4496DMP6185SK3-13 Datasheet

MFR RecommendedRFQ

FQD17P06TM

onsemiIn Stock: 24496FQD17P06TM Datasheet

MFR RecommendedRFQ

STD10P6F6

STMicroelectronicsIn Stock: 15325STD10P6F6 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRFR5505 is determined by the following criteria:

Mandatory Compatibility Parameters:

• FET Type: P-Channel (all substitutes must be P-Channel)
• Package/Case: TO-252-3 (DPAK) surface mount configuration
• Drain to Source Voltage (Vdss): Minimum 55V (substitutes rated 60V are acceptable)
• Continuous Drain Current (Id): Minimum 18A at 25°C (substitutes with 18.6A or higher are acceptable)
• Rds On (Max) @ 10V: Maximum 110mOhm (lower values indicate improved performance)
• Operating Temperature: Minimum -55°C to 150°C junction temperature range
• Gate-Source Voltage (Vgs): ±20V maximum (all substitutes comply with ±20V or higher ratings)

Substitution Logic: Substitute parts are grouped based on their ability to meet or exceed the IRFR5505 electrical specifications while maintaining identical surface mount packaging. All listed substitutes are P-Channel MOSFETs in TO-252-3 package format. Substitutes with higher voltage ratings (60V vs. 55V) provide enhanced voltage margin. Substitutes with equal or higher current ratings ensure thermal performance compatibility. Rds On values determine conduction losses; lower values indicate superior performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SPD18P06PGBTMA1 (Infineon Technologies) This substitute provides the closest electrical match to the IRFR5505, with 18.6A continuous drain current exceeding the original 18A specification. The 60V Vdss rating provides 5V additional voltage margin. Product status is Active with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Higher power dissipation rating (80W vs. 57W) supports thermal performance. Operating temperature range extends to 175°C, providing enhanced thermal headroom. This device is the primary recommended substitute for direct replacement applications.

FQD17P06TM (onsemi) This substitute provides 12A continuous drain current, which is lower than the IRFR5505 specification of 18A. The 60V Vdss rating and TO-252AA package maintain compatibility. Product status is Active with ROHS3 compliance. This device is suitable for applications where the 12A current rating is sufficient and where onsemi device qualification is required. Rds On value of 135mOhm is acceptable for most switching applications.

STD10P6F6 (STMicroelectronics) This substitute provides 10A continuous drain current, which is below the IRFR5505 specification of 18A. The 60V Vdss rating and DPAK package maintain mechanical compatibility. Product status is Active with ROHS3 compliance. This device is suitable only for applications where current requirements do not exceed 10A. Lower gate charge (6.4 nC) indicates faster switching characteristics.

DMP6185SK3-13 (Diodes Incorporated) This substitute provides 9.4A continuous drain current, which is significantly below the IRFR5505 specification of 18A. The 60V Vdss rating and TO-252-3 package maintain compatibility. Product status is Active with ROHS3 compliance. This device is suitable only for low-current applications and is not recommended for designs requiring the full 18A capability of the original part.

Frequently Asked Questions (FAQ)

Q: Can SPD18P06PGBTMA1 be used as a direct replacement for IRFR5505? A: Yes. SPD18P06PGBTMA1 meets or exceeds all critical electrical parameters of the IRFR5505. The 18.6A continuous drain current exceeds the original 18A specification. The 60V Vdss rating provides additional voltage margin over the 55V original specification. Both devices use identical TO-252-3 (DPAK) surface mount packaging. SPD18P06PGBTMA1 is Active status with ROHS3 compliance, addressing the obsolete status of the IRFR5505.

Q: Why do some substitute parts have lower current ratings than the IRFR5505? A: DMP6185SK3-13, FQD17P06TM, and STD10P6F6 have lower continuous drain current ratings (9.4A, 12A, and 10A respectively) compared to the IRFR5505 (18A). These devices are listed as substitutes but are suitable only for applications where the required drain current does not exceed their rated values. For applications requiring the full 18A capability, SPD18P06PGBTMA1 is the appropriate substitute.

Q: Are all substitute parts in the same package format? A: All substitute parts use TO-252-3 (DPAK) surface mount packaging or equivalent designations (PG-TO252-3, TO-252AA, DPAK). These package variants are mechanically and electrically compatible for PCB mounting and thermal management purposes.

Q: What is the significance of the 60V Vdss rating on substitute parts versus the 55V rating of the IRFR5505? A: The 60V Vdss rating on substitute parts provides 5V additional voltage margin compared to the IRFR5505. This higher rating ensures the device can safely operate in applications with voltage transients or design margins that approach the 55V specification. The higher rating does not negatively impact performance in 55V applications.

Q: Why is the IRFR5505 classified as obsolete? A: The IRFR5505 is listed as obsolete by Infineon Technologies. This classification indicates the device is no longer in active production and may have limited availability. Substitute parts with Active status (SPD18P06PGBTMA1, FQD17P06TM, STD10P6F6, DMP6185SK3-13) ensure design continuity and long-term supply chain reliability.

Q: What does ROHS3 compliance mean for these substitute parts? A: ROHS3 compliance indicates the substitute parts meet Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All listed substitute parts are ROHS3 compliant, while the original IRFR5505 is RoHS non-compliant. This compliance status is important for applications subject to environmental and regulatory requirements.

Q: How do Rds On values affect device selection? A: Rds On (on-state resistance) determines conduction losses when the MOSFET is in the on state. Lower Rds On values result in lower power dissipation and reduced heat generation. The IRFR5505 has 110mOhm Rds On. SPD18P06PGBTMA1 (130mOhm) has slightly higher losses but remains acceptable. FQD17P06TM (135mOhm) and DMP6185SK3-13 (150mOhm) have progressively higher losses. STD10P6F6 (160mOhm) has the highest Rds On value. For thermally sensitive applications, lower Rds On values are preferred.

Q: Can substitute parts with lower current ratings be used in IRFR5505 applications? A: Substitute parts with lower current ratings (DMP6185SK3-13 at 9.4A, FQD17P06TM at 12A, STD10P6F6 at 10A) can only be used if the application's actual drain current requirement does not exceed the substitute part's rating. Using an undersized device in an application requiring 18A will result in device failure or thermal damage. Application current requirements must be verified before selecting a lower-rated substitute.