IRLR2905TRLPBF N-Channel 55V 42A MOSFET Equivalent & Substitute Parts

Part Overview

The IRLR2905TRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, part of the HEXFET® series. This device features a 55V drain-to-source voltage rating with 42A continuous drain current capability and 110W maximum power dissipation in a surface mount TO-252AA (DPAK) package. The part is classified as Obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. Substitute parts are selected based on matching or exceeding critical electrical parameters while maintaining compatible packaging and thermal characteristics.

Key Parameters

Parameter	Value	Unit
FET Type	N-Channel	—
Drain-to-Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	42	A (Tc)
On-Resistance (Rds On) @ 25A, 10V	27	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2	V
Gate Charge (Qg) @ 5V	48	nC
Power Dissipation (Max)	110	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the IRLR2905TRLPBF are categorized into two groups based on substitution criteria:

Parametric Equivalent: Parts that match the original specifications across all critical electrical parameters, enabling direct replacement without circuit modification.

Manufacturer Recommended Substitutes: Parts that differ in one or more electrical parameters (voltage rating, current rating, or on-resistance) but remain functionally compatible within defined application constraints. These substitutes are selected when the original part is unavailable and the application can tolerate parameter variations.

Critical Parameters for Substitution:

Drain-to-Source Voltage (Vdss): Must equal or exceed 55V
Continuous Drain Current (Id): Must equal or exceed 42A
Package Type: Must be TO-252-3 (DPAK) for mechanical compatibility
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass -55°C to 175°C
On-Resistance (Rds On): Lower values indicate improved performance; values up to 40mOhm remain acceptable for most applications

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On @ 10V (mOhm)	Qg @ Vgs (nC)	Power Dissipation (W)	Product Status	Package
IRLR2905TRLPBF	Infineon	55	42	27 @ 25A	48 @ 5V	110	Obsolete	TO-252-3
IRLR2905TRPBF	Infineon	55	42	27 @ 25A	48 @ 5V	110	Active	TO-252-3
IPD30N06S2L23ATMA1	Infineon	55	30	23 @ 22A	42 @ 10V	100	Discontinued	TO-252-3
IPD30N10S3L34ATMA1	Infineon	100	30	31 @ 30A	31 @ 10V	57	Active	TO-252-3
IPD35N10S3L26ATMA1	Infineon	100	35	24 @ 35A	39 @ 10V	71	Active	TO-252-3
FDD13AN06A0	onsemi	60	50 (Tc)	13.5 @ 50A	29 @ 10V	115	Active	TO-252-3
FDD13AN06A0-F085	onsemi	60	50 (Tc)	13.5 @ 50A	29 @ 10V	115	Active	TO-252-3
STD20NF06LT4	STMicroelectronics	60	24	40 @ 12A	13 @ 10V	60	Active	TO-252-3
STD25NF10LT4	STMicroelectronics	100	25	35 @ 12.5A	52 @ 5V	100	Active	TO-252-3
STD25NF10T4	STMicroelectronics	100	25	38 @ 12.5A	55 @ 10V	100	Active	TO-252-3
STD15NF10T4	STMicroelectronics	100	23	65 @ 12A	40 @ 10V	70	Active	TO-252-3

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

IRLR2905TRPBF is the parametric equivalent of IRLR2905TRLPBF. Both parts share identical electrical specifications (55V, 42A, 27mOhm Rds On, 110W power dissipation) and package configuration. IRLR2905TRPBF is currently Active in production status, making it the preferred choice for applications requiring exact parameter matching. This part maintains full compatibility with existing circuit designs without modification.

Manufacturer Recommended Substitutes (Infineon OptiMOS™ Series):

IPD30N06S2L23ATMA1 operates at 55V with 30A continuous drain current. This part is suitable for applications where the required drain current does not exceed 30A. The lower on-resistance (23mOhm) provides improved efficiency. Product status is Discontinued at DiGi Electronics; inventory availability should be verified before selection.

IPD30N10S3L34ATMA1 and IPD35N10S3L26ATMA1 feature elevated voltage ratings (100V) with reduced power dissipation. IPD30N10S3L34ATMA1 provides 30A at 100V with 57W dissipation and is currently Active. IPD35N10S3L26ATMA1 provides 35A at 100V with 71W dissipation and is currently Active. These parts are suitable for applications where higher voltage headroom is required or where the original 55V rating exceeds system requirements.

Manufacturer Recommended Substitutes (onsemi PowerTrench® Series):

FDD13AN06A0 and FDD13AN06A0-F085 operate at 60V with 50A continuous drain current (Tc) and 13.5mOhm on-resistance. Both parts exceed the original current and power dissipation specifications. FDD13AN06A0-F085 includes AEC-Q101 automotive qualification. These parts are suitable for applications requiring higher current capacity or lower on-resistance losses.

Manufacturer Recommended Substitutes (STMicroelectronics STripFET™ II Series):

STD20NF06LT4 operates at 60V with 24A continuous drain current. This part is suitable for lower-current applications where the 42A rating of the original part exceeds requirements.

STD25NF10LT4 and STD25NF10T4 operate at 100V with 25A continuous drain current and 100W power dissipation. Both parts provide elevated voltage rating with comparable power handling. STD25NF10LT4 features 35mOhm on-resistance; STD25NF10T4 features 38mOhm on-resistance. Both are currently Active.

STD15NF10T4 operates at 100V with 23A continuous drain current and 70W power dissipation. This part is suitable for applications where the original 42A rating exceeds requirements and higher voltage headroom is beneficial.

Compliance and Certification:

All listed substitute parts maintain RoHS3 compliance and REACH Unaffected status, matching the original part's regulatory standing. Moisture Sensitivity Level (MSL) is 1 (Unlimited) across all parts. All parts operate within the -55°C to 175°C temperature range specified for the original device.

Frequently Asked Questions (FAQ)

Q: Can IRLR2905TRPBF be used as a direct replacement for IRLR2905TRLPBF?

A: Yes. IRLR2905TRPBF is a parametric equivalent with identical electrical specifications and package configuration. The only difference is product status: IRLR2905TRLPBF is Obsolete while IRLR2905TRPBF is Active. IRLR2905TRPBF is the recommended direct replacement.

Q: What is the difference between the Infineon OptiMOS™ substitutes and the original HEXFET® part?

A: The OptiMOS™ series (IPD30N06S2L23ATMA1, IPD30N10S3L34ATMA1, IPD35N10S3L26ATMA1) represents a newer technology generation with improved on-resistance and gate charge characteristics. IPD30N06S2L23ATMA1 matches the 55V rating but reduces current to 30A. IPD30N10S3L34ATMA1 and IPD35N10S3L26ATMA1 increase voltage rating to 100V with reduced power dissipation. All maintain TO-252-3 package compatibility.

Q: Can I use a 100V-rated MOSFET in place of the 55V original part?

A: Yes, provided all other parameters meet application requirements. Higher voltage-rated MOSFETs (IPD30N10S3L34ATMA1, IPD35N10S3L26ATMA1, STD25NF10LT4, STD25NF10T4, STD15NF10T4) can operate safely in 55V circuits. However, verify that current and power dissipation ratings are adequate for your application. Higher voltage ratings typically result in increased on-resistance at equivalent current levels.

Q: What does "Tc" mean in the current rating specification?

A: "Tc" denotes current rating at case temperature (typically 25°C). This is the continuous drain current the device can sustain under specified thermal conditions. "Ta" denotes current rating at ambient temperature. FDD13AN06A0 specifies both 9.9A (Ta) and 50A (Tc), indicating significantly higher current capability when case temperature is controlled.

Q: Are all substitute parts available in the same packaging?

A: Yes. All listed substitute parts use TO-252-3 (DPAK) surface mount packaging with identical mechanical dimensions and pin configuration. This ensures compatibility with existing PCB layouts and assembly processes.

Q: What is the significance of on-resistance (Rds On) differences between parts?

A: On-resistance determines conduction losses and heat generation. Lower on-resistance values reduce power dissipation and improve efficiency. For example, FDD13AN06A0 features 13.5mOhm compared to the original 27mOhm, resulting in approximately 50% lower conduction losses at equivalent current levels. However, lower on-resistance typically correlates with higher gate charge and input capacitance, affecting switching speed.

Q: Can I substitute a part with lower current rating if my application does not require 42A?

A: Yes, provided the substitute part's current rating meets or exceeds your actual circuit requirements. For example, STD20NF06LT4 (24A) or STD15NF10T4 (23A) are suitable for applications requiring less than 24A continuous drain current. Verify that power dissipation at your actual operating current does not exceed the part's thermal rating.

Q: What is the difference between FDD13AN06A0 and FDD13AN06A0-F085?

A: Both parts are electrically identical with 60V, 50A, and 13.5mOhm specifications. FDD13AN06A0-F085 includes AEC-Q101 automotive qualification and is supplied in Tape & Reel (TR) packaging. FDD13AN06A0 is supplied in Cut Tape (CT) & Digi-Reel® packaging. Select FDD13AN06A0-F085 for automotive applications requiring AEC-Q101 compliance.

Q: How do I determine which substitute part is best for my application?

A: Identify your circuit's critical requirements: (1) minimum voltage rating required, (2) maximum continuous drain current, (3) acceptable on-resistance and power dissipation, (4) thermal management capability, (5) any regulatory or qualification requirements (automotive, industrial, etc.). Cross-reference these requirements against the Parameter Comparison table. Verify that the selected substitute meets or exceeds all critical parameters while maintaining TO-252-3 package compatibility.

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