IRLR2908PBF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRLR2908PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 80V drain-to-source voltage with 30A continuous drain current in a Surface Mount TO-252AA (DPAK) package. This device is part of the HEXFET® series and is currently discontinued at DiGi Electronics. Due to its discontinued status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the TO-252-3 DPAK package footprint and support the electrical requirements of the original application.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	80	V
Continuous Drain Current (Id) @ 25°C	30	A (Tc)
On-State Resistance (Rds On) @ Id, Vgs	28 mOhm @ 23A, 10V	mOhm
Gate Threshold Voltage (Vgs(th)) @ Id	2.5	V @ 250µA
Gate Charge (Qg) @ Vgs	33	nC @ 4.5V
Power Dissipation (Max)	120	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 DPAK	Surface Mount
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitute parts for the IRLR2908PBF are selected based on the following critical parameters:

Mandatory Compatibility Criteria:

FET Type: N-Channel
Package: TO-252-3 DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 175°C minimum
Drain-to-Source Voltage (Vdss): 80V or higher
Continuous Drain Current (Id): 30A or higher at 25°C
On-State Resistance (Rds On): Comparable performance at rated current and gate voltage
Gate Threshold Voltage (Vgs(th)): Within acceptable switching characteristics
RoHS3 Compliance and MSL Level 1

Substitution Logic: Parts are grouped into two categories based on voltage and current ratings:

Category A – Direct Voltage Equivalents (80V–100V rated): These parts maintain the original 80V voltage class or operate at 100V, providing direct functional replacement with equal or superior current handling. Includes Infineon OptiMOS™ series (IPD30N10S3L34ATMA1, IPD35N10S3L26ATMA1) and Alpha & Omega Semiconductor devices (AOD2910, AOD2910E).

Category B – Higher Voltage Rated Parts (100V–105V rated): These parts exceed the original voltage specification, providing enhanced voltage margin and are suitable for applications requiring additional headroom. Includes Nexperia TrenchMOS™ series (BUK7227-100B,118, BUK9226-75A,118) and Diodes Incorporated devices (DMNH10H028SK3-13, DMNH10H028SK3Q-13).

All substitute parts share the same package footprint, thermal characteristics within acceptable ranges, and compliance certifications as the original IRLR2908PBF.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Power Dissipation (W)	Product Status	Package
IRLR2908PBF	Infineon	80	30 (Tc)	28 @ 23A, 10V	33 @ 4.5V	120 (Tc)	Discontinued	TO-252-3 DPAK
IPD30N10S3L34ATMA1	Infineon	100	30 (Tc)	31 @ 30A, 10V	31 @ 10V	57 (Tc)	Active	TO-252-3 DPAK
IPD35N10S3L26ATMA1	Infineon	100	35 (Tc)	24 @ 35A, 10V	39 @ 10V	71 (Tc)	Active	TO-252-3 DPAK
AOD2910	Alpha & Omega	100	31 (Tc)	24 @ 20A, 10V	25 @ 10V	53.5 (Tc)	Active	TO-252-3 DPAK
AOD2910E	Alpha & Omega	100	37 (Tc)	—	—	—	Active	TO-252-3 DPAK
AOD4126	Alpha & Omega	100	43 (Tc)	24 @ 20A, 10V	34 @ 10V	100 (Tc)	Active	TO-252-3 DPAK
AOD464	Alpha & Omega	105	40 (Tc)	28 @ 20A, 10V	46 @ 10V	100 (Tc)	Active	TO-252-3 DPAK
BUK7227-100B,118	Nexperia	100	48 (Tc)	27 @ 25A, 10V	37 @ 10V	167 (Tc)	Obsolete	TO-252-3 DPAK
BUK9226-75A,118	Nexperia	75	45 (Tc)	24.6 @ 25A, 10V	—	114 (Tc)	Obsolete	TO-252-3 DPAK
DMNH10H028SK3-13	Diodes Inc.	100	55 (Tc)	28 @ 20A, 10V	36 @ 10V	2 (Ta)	Active	TO-252-3 DPAK
DMNH10H028SK3Q-13	Diodes Inc.	100	55 (Tc)	28 @ 20A, 10V	36 @ 10V	2 (Ta)	Active	TO-252-3 DPAK

Engineering Selection Recommendations

Primary Substitutes (Active Status, Infineon Manufacturer):

IPD30N10S3L34ATMA1 and IPD35N10S3L26ATMA1 are recommended as primary substitutes. Both are manufactured by Infineon Technologies and maintain active product status. IPD30N10S3L34ATMA1 provides equivalent 30A current rating with 100V voltage specification, while IPD35N10S3L26ATMA1 offers enhanced 35A current capability. Both devices are OptiMOS™ series parts with RoHS3 compliance, MSL Level 1, and identical TO-252-3 DPAK packaging. These parts are in high inventory (20,100 and 8,550 units respectively) and support direct PCB layout compatibility.

Secondary Substitutes (Active Status, Alternative Manufacturers):

AOD2910, AOD2910E, AOD4126, and AOD464 from Alpha & Omega Semiconductor provide active alternatives with 100V–105V ratings and current ratings from 31A to 40A. These parts maintain the same package footprint and operating temperature range. AOD2910 and AOD2910E are particularly suitable for applications requiring 30A–37A performance. AOD4126 and AOD464 support higher current applications up to 43A and 40A respectively, with power dissipation ratings of 100W (Tc).

DMNH10H028SK3-13 and DMNH10H028SK3Q-13 from Diodes Incorporated offer 100V, 55A rated devices in TO-252-3 DPAK packaging with active product status. These parts provide significant current margin above the original 30A specification and are suitable for applications requiring enhanced current handling capacity.

Obsolete Alternatives (Not Recommended for New Designs):

BUK7227-100B,118 and BUK9226-75A,118 from Nexperia are marked as obsolete and should not be selected for new designs. These TrenchMOS™ series parts are retained in this reference for legacy system maintenance only.

Compliance and Certification:

All recommended active substitutes maintain RoHS3 compliance, MSL Level 1 (Unlimited moisture sensitivity), and REACH Unaffected status, matching the original IRLR2908PBF certifications. Operating temperature ranges of -55°C to 175°C are consistent across all substitutes.

Frequently Asked Questions (FAQ)

Q1: Can IPD30N10S3L34ATMA1 directly replace IRLR2908PBF in existing designs?

A: Yes. IPD30N10S3L34ATMA1 is a direct functional replacement. Both devices are N-Channel MOSFETs in TO-252-3 DPAK packaging with 30A continuous drain current rating. The substitute operates at 100V (versus 80V original), providing additional voltage margin. On-state resistance (31 mOhm @ 30A, 10V) is comparable to the original (28 mOhm @ 23A, 10V). Gate threshold voltage and operating temperature ranges are compatible. PCB layout and thermal management remain unchanged.

Q2: What is the difference between AOD2910 and AOD2910E?

A: Both are Alpha & Omega Semiconductor N-Channel MOSFETs in TO-252-3 DPAK packaging rated for 100V. AOD2910 is rated for 31A (Tc) continuous drain current, while AOD2910E is rated for 37A (Tc). AOD2910E provides higher current capacity for applications requiring additional headroom. Both maintain the same package footprint and operating temperature range (-55°C to 175°C).

Q3: Why do some substitute parts have higher voltage ratings (100V–105V) than the original 80V?

A: Higher voltage ratings provide additional design margin and component availability flexibility. A 100V or 105V rated device can operate safely in an 80V application while offering enhanced voltage headroom for transient conditions or future design modifications. The higher voltage rating does not negatively impact performance in 80V applications; it only extends the safe operating range.

Q4: Are DMNH10H028SK3-13 and DMNH10H028SK3Q-13 interchangeable?

A: Both devices are Diodes Incorporated N-Channel MOSFETs rated for 100V, 55A (Tc) in TO-252-3 DPAK packaging. The primary difference is gate threshold voltage specification: DMNH10H028SK3-13 is specified at 3.3V @ 250µA, while DMNH10H028SK3Q-13 is specified at 4V @ 250µA. Both are functionally compatible with the original IRLR2908PBF. Selection depends on specific gate drive voltage requirements in the application circuit.

Q5: Can I use AOD464 (105V, 40A) in place of IRLR2908PBF (80V, 30A)?

A: Yes. AOD464 is electrically and mechanically compatible. It provides higher voltage (105V) and current (40A) ratings, offering significant performance margin above the original specification. The TO-252-3 DPAK package is identical. This substitution is suitable for applications where enhanced current capacity and voltage headroom are beneficial or required.

Q6: What is the significance of the "Tc" and "Ta" designations in current ratings?

A: "Tc" denotes continuous drain current rating at case temperature (typically 25°C), while "Ta" denotes continuous drain current rating at ambient temperature. Tc ratings are generally higher than Ta ratings for the same device. When comparing substitute parts, use Tc ratings for consistent evaluation at the same thermal reference point as the original IRLR2908PBF (30A Tc).

Q7: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended active substitute parts listed in this reference maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity level, matching the original IRLR2908PBF certifications. Obsolete parts (BUK7227-100B,118 and BUK9226-75A,118) also maintain these certifications but are not recommended for new designs.

Q8: Which substitute offers the best on-state resistance performance?

A: IPD35N10S3L26ATMA1 and AOD2910 both specify 24 mOhm on-state resistance at 10V gate voltage, which is lower than the original IRLR2908PBF (28 mOhm @ 23A, 10V). Lower on-state resistance reduces power dissipation and heat generation in switching applications. IPD35N10S3L26ATMA1 achieves this at 35A drain current, while AOD2910 achieves it at 20A drain current.

Q9: Can I use a substitute with lower current rating than 30A?

A: No. Substitute parts must maintain equal or higher continuous drain current rating (30A or greater) to ensure safe operation under the original design's maximum current conditions. Using a lower-rated device risks thermal stress, device failure, and circuit malfunction.

Q10: What packaging considerations apply when substituting IRLR2908PBF?

A: All recommended substitutes use TO-252-3 DPAK (2 Leads + Tab), SC-63 packaging, identical to the original IRLR2908PBF. PCB footprint, lead spacing, and thermal pad dimensions are compatible. No PCB layout modifications are required. Verify that the substitute part number confirms TO-252-3 DPAK packaging before procurement.

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