IRLR2905ZPBF N-Channel MOSFET 55V 42A Equivalent & Substitute Parts

Part Overview

The IRLR2905ZPBF 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 IRLR2905ZPBF is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while preserving the same mechanical package footprint.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	42	A (Tc)
On-State Resistance (Rds On) @ 36A, 10V	13.5	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	3	V
Gate Charge (Qg) @ 5V	35	nC
Power Dissipation (Max)	110	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	Surface Mount
FET Type	N-Channel	MOSFET

Substitute Part Grouping Explanation

Substitute parts for the IRLR2905ZPBF are categorized based on electrical parameter compatibility within the following criteria:

Primary Substitutes (Direct Equivalents): Parts maintaining identical or superior Vdss (55V minimum), Id (42A minimum), Rds On performance, and TO-252-3 package compatibility. These parts are pin-compatible and require no circuit modifications.

Secondary Substitutes (Higher Voltage Rating): Parts with elevated Vdss ratings (75V to 100V) that maintain or exceed the 42A current capability and preserve the TO-252-3 package. These provide additional voltage margin and are electrically compatible in applications where higher voltage headroom is acceptable.

Tertiary Substitutes (Current-Optimized): Parts with Vdss ratings between 55V and 100V that may have current ratings differing from 42A but maintain thermal and package compatibility. These are suitable for applications where exact current matching is not critical.

All substitute parts must satisfy the following mandatory criteria:

N-Channel MOSFET technology
Surface mount TO-252-3 (DPAK) package
Operating temperature range of -55°C to 175°C minimum
RoHS3 compliance
Moisture Sensitivity Level 1 (Unlimited)

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On @ 10V (mOhm)	Vgs(th) (V)	Qg @ Vgs (nC)	Power Dissipation (W)	Package	Status
IRLR2905ZPBF	Infineon	55	42	13.5	3	35 @ 5V	110	TO-252-3	Discontinued
IRLR2905ZTRPBF	Infineon	55	42	13.5	3	35 @ 5V	110	TO-252-3	Active
STD60NF55LT4	STMicroelectronics	55	60	15	2	56 @ 5V	100	TO-252-3	Active
STD60NF55LAT4	STMicroelectronics	55	60	15	2	40 @ 5V	110	TO-252-3	Active
FDD13AN06A0-F085	onsemi	60	50	13.5	4	29 @ 10V	115	TO-252-3	Active
STD30NF06LT4	STMicroelectronics	60	35	28	2.5	31 @ 5V	70	TO-252-3	Active
STD45NF75T4	STMicroelectronics	75	40	24	4	80 @ 10V	125	TO-252-3	Active
STD25NF10LT4	STMicroelectronics	100	25	35	2.5	52 @ 5V	100	TO-252-3	Active
STD26NF10	STMicroelectronics	100	25	38	4	55 @ 10V	100	TO-252-3	Active
IPD30N10S3L34ATMA1	Infineon	100	30	31	2.4	31 @ 10V	57	TO-252-3	Active
IPD35N10S3L26ATMA1	Infineon	100	35	24	2.4	39 @ 10V	71	TO-252-3	Active

Engineering Selection Recommendations

Direct Replacement (No Circuit Modification Required):

IRLR2905ZTRPBF is the direct equivalent to IRLR2905ZPBF. This part maintains identical electrical specifications across all parameters and is manufactured by Infineon Technologies under the same HEXFET® series designation. The ZTRPBF variant differs only in packaging format (Cut Tape & Digi-Reel® versus bulk packaging) and product status (Active versus Discontinued). This part is recommended as the primary replacement with zero design risk.

Recommended Alternatives (Voltage-Compatible Substitutes):

STD60NF55LT4 and STD60NF55LAT4 are functionally compatible alternatives manufactured by STMicroelectronics. Both maintain the 55V Vdss rating and provide superior current capability (60A versus 42A), enabling direct substitution in existing designs. STD60NF55LAT4 includes AEC-Q101 automotive qualification, suitable for automotive applications. These parts are pin-compatible with the IRLR2905ZPBF and require no circuit modifications.

FDD13AN06A0-F085 (onsemi, PowerTrench® series) provides 60V Vdss with 50A continuous current capability and includes AEC-Q101 automotive qualification. This part is suitable for applications requiring automotive-grade components and offers improved current handling.

Higher Voltage Alternatives (Design Flexibility):

STD45NF75T4 (75V, 40A) and IPD35N10S3L26ATMA1 (100V, 35A) provide elevated voltage ratings while maintaining current capability near or above the original 42A specification. These parts are appropriate for designs requiring additional voltage margin or where supply voltage tolerance necessitates higher Vdss ratings. All parts maintain TO-252-3 package compatibility and identical pin configuration.

Compliance and Certification:

All recommended substitute parts comply with RoHS3 requirements and carry Moisture Sensitivity Level 1 (Unlimited) ratings. STD60NF55LAT4 and FDD13AN06A0-F085 include AEC-Q101 automotive qualification for applications requiring automotive-grade component certification.

Frequently Asked Questions (FAQ)

Q: Can IRLR2905ZTRPBF be used as a direct replacement for IRLR2905ZPBF?

A: Yes. IRLR2905ZTRPBF is electrically and mechanically identical to IRLR2905ZPBF. The only difference is packaging format and product status. No circuit modifications are required.

Q: What is the primary difference between the substitute parts listed?

A: Substitute parts differ in Vdss rating (55V, 60V, 75V, or 100V), continuous drain current capability (25A to 60A), and on-state resistance characteristics. Parts with higher Vdss ratings provide additional voltage margin but may have different Rds On performance. Current capability varies to accommodate different application requirements.

Q: Are all substitute parts pin-compatible with IRLR2905ZPBF?

A: Yes. All substitute parts use the TO-252-3 (DPAK) package with identical pin configuration: Gate, Drain, and Source connections. No PCB layout modifications are required for mechanical compatibility.

Q: Which substitute part should I select if my application requires automotive qualification?

A: STD60NF55LAT4 and FDD13AN06A0-F085 both carry AEC-Q101 automotive qualification. STD60NF55LAT4 maintains the 55V Vdss rating with 60A current capability. FDD13AN06A0-F085 provides 60V Vdss with 50A current capability.

Q: What is the impact of selecting a substitute with higher Vdss rating?

A: Higher Vdss ratings (75V or 100V) provide additional voltage safety margin in applications with variable supply voltages. These parts are electrically compatible and require no circuit modifications. However, on-state resistance (Rds On) may differ, affecting power dissipation characteristics. Verify thermal performance in your specific application.

Q: Can I use STD25NF10LT4 or STD26NF10 as substitutes despite their lower current rating?

A: These parts have 100V Vdss ratings but only 25A continuous current capability, below the original 42A specification. They are suitable only for applications where the actual circuit current requirement is 25A or less. Verify circuit current requirements before selection.

Q: What is the difference between STD60NF55LT4 and STD60NF55LAT4?

A: Both parts maintain 55V Vdss and 60A current capability with identical pin configuration. STD60NF55LAT4 includes AEC-Q101 automotive qualification and carries a 110W power dissipation rating. STD60NF55LT4 is rated for 100W power dissipation. Select STD60NF55LAT4 for automotive applications.

Q: Are there any thermal performance differences between substitute parts?

A: Yes. Power dissipation ratings vary: IRLR2905ZPBF and IRLR2905ZTRPBF are rated 110W, while STD60NF55LT4 is rated 100W and STD30NF06LT4 is rated 70W. Higher current-rated parts (60A) may have lower Rds On values, reducing power dissipation in high-current applications. Verify thermal performance through datasheet analysis for your specific operating conditions.

Q: Do all substitute parts have the same gate charge characteristics?

A: No. Gate charge (Qg) varies between parts, ranging from 29nC to 80nC depending on the specific device. Lower gate charge reduces driver power requirements and switching losses. Verify gate charge compatibility with your gate driver circuit specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message