IRL2505STRR N-Channel MOSFET 55V 104A Equivalent & Substitute Parts

Part Overview

The IRL2505STRR is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 104A continuous drain current in a D2PAK surface mount package. This device is classified as obsolete product status. Due to its obsolescence, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term supply chain reliability for applications requiring comparable electrical and mechanical characteristics.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	104	A
On-Resistance (Rds On) @ 54A, 10V	8	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2	V
Gate Charge (Qg) @ 5V	130	nC
Input Capacitance (Ciss) @ 25V	5000	pF
Power Dissipation (Tc)	200	W
Operating Temperature Range	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the IRL2505STRR is determined by the following critical parameters:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss) must be equal to or greater than 55V
Continuous Drain Current (Id) must be equal to or greater than 104A at 25°C
On-Resistance (Rds On) must be comparable to maintain thermal performance
Gate Threshold Voltage (Vgs(th)) must fall within acceptable switching characteristics
Operating temperature range must encompass -55°C to 175°C

Mechanical Compatibility Criteria:

Package type must be D2PAK (TO-263-3) for direct PCB footprint compatibility
Mounting type must be Surface Mount
Lead configuration must match the original 2 Leads + Tab specification

Compliance Criteria:

RoHS compliance status (original part is non-compliant; substitutes should be ROHS3 compliant where available)
Moisture Sensitivity Level (MSL) must be 1 (Unlimited) or equivalent
REACH and ECCN classifications must align with regulatory requirements

Substitute parts are grouped into two categories: Direct Electrical Equivalents (matching or exceeding all electrical parameters within tight tolerances) and Functional Alternatives (meeting minimum electrical requirements with acceptable performance trade-offs for specific applications).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Qg (nC)	Ciss (pF)	Power Diss. (W)	Status	RoHS
IRL2505STRR	Infineon	55	104	8	2	130	5000	200	Obsolete	Non-compliant
IPB081N06L3GATMA1	Infineon	60	50	8.1	2.2	29	4900	79	Active	ROHS3
IPB090N06N3GATMA1	Infineon	60	50	9	4	36	2900	71	Active	ROHS3
BUK9609-75A,118	NXP USA Inc.	75	75	8.5	2	—	8840	230	Active	—
HUF75345S3ST	onsemi	55	75	7	4	275	4000	325	Active	ROHS3
PSMN008-75B,118	Nexperia USA Inc.	75	75	8.5	4	122.8	5260	230	Active	ROHS3
PSMN015-60BS,118	Nexperia USA Inc.	60	50	14.8	4	20.9	1220	86	Active	ROHS3
PSMN7R6-60BS,118	Nexperia USA Inc.	60	92	7.8	4	38.7	2651	149	Active	ROHS3
STB140NF55T4	STMicroelectronics	55	80	8	4	142	5300	300	Active	ROHS3
STB150NF55T4	STMicroelectronics	55	120	6	4	190	4400	300	Active	ROHS3
STB75NF75LT4	STMicroelectronics	75	75	11	2.5	90	4300	300	Active	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

STB150NF55T4 (STMicroelectronics) is the closest functional equivalent. It maintains the 55V Vdss rating matching the original specification, exceeds the 104A continuous drain current requirement with 120A capability, and provides superior on-resistance of 6mOhm at 60A. The D2PAK package and surface mount configuration are identical. Product status is Active with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Power dissipation of 300W exceeds the original 200W specification, providing thermal margin.

STB140NF55T4 (STMicroelectronics) offers 55V Vdss with 80A continuous drain current. While the current rating falls below the original 104A specification, the 8mOhm on-resistance matches the original device. This part is suitable for applications where the actual operating current does not reach the full 104A rating. Active product status and ROHS3 compliance are confirmed.

Secondary Substitutes (Voltage/Current Trade-offs):

HUF75345S3ST (onsemi) provides 55V Vdss with 75A continuous drain current and superior 7mOhm on-resistance. The 325W power dissipation provides significant thermal headroom. This device is appropriate for designs where current requirements are below 104A but thermal performance is critical.

PSMN7R6-60BS,118 (Nexperia USA Inc.) operates at 60V Vdss with 92A continuous drain current and 7.8mOhm on-resistance. The elevated voltage rating provides additional design margin. This part is suitable for applications tolerating the 60V rating with current demands between 92A and 104A.

Higher Voltage Alternatives (75V Rating):

PSMN008-75B,118 and BUK9609-75A,118 both provide 75V Vdss with 75A continuous drain current. These parts are appropriate for designs requiring elevated voltage headroom, though the 75A current rating is below the original 104A specification. Both maintain D2PAK packaging and surface mount configuration.

Compliance and Availability Considerations:

All recommended substitute parts are classified as Active product status, ensuring continued manufacturing and supply chain availability. ROHS3 compliance is confirmed for all Infineon, onsemi, STMicroelectronics, and Nexperia parts, addressing regulatory requirements. The original IRL2505STRR is RoHS non-compliant; substitution with compliant alternatives is recommended for new designs and long-term production.

Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all substitute parts, matching the original specification and eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can I directly replace IRL2505STRR with STB150NF55T4 without circuit modifications?

A: Yes, direct replacement is possible. Both devices share identical D2PAK packaging, surface mount configuration, and 55V Vdss rating. The STB150NF55T4 exceeds the 104A continuous drain current specification with 120A capability and provides superior on-resistance of 6mOhm. No PCB layout changes are required. Verify that your application does not depend on the specific gate charge or input capacitance characteristics of the original device.

Q: Why do some substitute parts have higher Vdss ratings (60V or 75V) than the original 55V?

A: Higher Vdss ratings provide additional voltage margin and are electrically compatible with 55V applications. A 60V or 75V rated device can safely operate in a 55V circuit. The elevated rating does not degrade performance; it only increases the maximum allowable drain-to-source voltage. Select higher voltage alternatives when design margins or future application flexibility are priorities.

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

A: On-resistance directly affects power dissipation and thermal performance. Lower Rds On values (e.g., 6mOhm in STB150NF55T4) result in reduced heat generation at the same current level. Higher Rds On values (e.g., 14.8mOhm in PSMN015-60BS,118) increase power dissipation. Select substitutes with Rds On values equal to or lower than the original 8mOhm specification to maintain or improve thermal performance. If thermal design allows, higher Rds On values may be acceptable for lower-current applications.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitute parts are ROHS3 compliant. The original IRL2505STRR is RoHS non-compliant. Substitution with compliant alternatives is mandatory for new product designs and recommended for existing designs undergoing revision or long-term production planning.

Q: Can I use IPB081N06L3GATMA1 or IPB090N06N3GATMA1 as substitutes despite their lower current ratings?

A: These Infineon OptiMOS™ parts are rated for 50A continuous drain current, significantly below the original 104A specification. They are suitable only for applications where actual operating current does not exceed 50A. Do not use these parts in designs requiring the full 104A capability. Verify actual circuit current requirements before selecting lower-current alternatives.

Q: What is the impact of different gate charge (Qg) values on circuit design?

A: Gate charge affects gate drive circuit design and switching speed. The original IRL2505STRR has 130nC gate charge at 5V. Substitute parts range from 20.9nC to 275nC. Lower gate charge values (e.g., PSMN015-60BS,118 at 20.9nC) require less gate drive energy and enable faster switching. Higher gate charge values (e.g., HUF75345S3ST at 275nC) require more robust gate drive circuits. Verify that your gate driver circuit can supply adequate current for the selected substitute part's gate charge specification.

Q: Does package type affect thermal performance?

A: All substitute parts use D2PAK (TO-263-3) packaging, which is thermally equivalent. Thermal performance differences arise from on-resistance and power dissipation ratings, not package type. The D2PAK package provides adequate thermal coupling to PCB copper planes when properly designed. Ensure adequate copper area and thermal vias are present in PCB layout regardless of which substitute part is selected.

Q: Are there any switching frequency limitations I should consider?

A: The provided specifications do not include switching frequency ratings. Consult individual manufacturer datasheets for maximum recommended switching frequencies. Generally, lower gate charge and input capacitance values support higher switching frequencies. Parts with higher Qg and Ciss values may require frequency derating in high-frequency applications.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging formats?

A: Cut Tape and Tape & Reel are supply formats, not device formats. Both deliver the same D2PAK component. Tape & Reel is standard for high-volume automated assembly. Cut Tape is used for lower-volume or manual assembly operations. Device electrical and thermal characteristics are identical regardless of supply format.

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