IRL520NSTRL Equivalent & Substitute Parts

Part Overview

The IRL520NSTRL is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage with 10A continuous drain current at 25°C. The device is housed in a D2PAK (TO-263-3) surface mount package and is classified as Obsolete. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing production, maintenance, and design continuity. The IRL520NSTRL series represents a legacy HEXFET® technology platform, and suitable alternatives are available from both Infineon and Vishay Siliconix manufacturers.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	100	V
Continuous Drain Current (Id) @ 25°C	10	A (Tc)
On-State Resistance (Rds On Max) @ 6A, 10V	180	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	2	V
Gate Charge (Qg Max) @ 5V	20	nC
Input Capacitance (Ciss Max) @ 25V	440	pF
Power Dissipation (Max)	3.8 (Ta), 48 (Tc)	W
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	D2PAK (TO-263-3)	Surface Mount
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—

Substitute Part Grouping Explanation

Substitution of the IRL520NSTRL is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 100V
Continuous Drain Current (Id): Must equal or exceed 10A at 25°C
Gate Threshold Voltage (Vgs(th)): Must be compatible with 2V maximum specification
On-State Resistance (Rds On): Lower or equivalent values ensure functional compatibility
Operating Temperature Range: Must span -55°C to 175°C minimum
Gate Charge (Qg) and Input Capacitance (Ciss): Must be within acceptable switching performance parameters

Mechanical Compatibility Criteria:

Package Type: D2PAK (TO-263-3) surface mount configuration
Pin Configuration: 2 Leads + Tab standard

Compliance Considerations:

RoHS Status: Compliance status affects long-term design viability
Product Status: Active or Not For New Designs status influences availability and support

The substitute parts listed below meet these criteria with documented electrical and mechanical equivalence.

Parameter Comparison

Parameter	IRL520NSTRL (Main)	IRL520NSTRLPBF (Infineon)	IRL520STRL (Vishay)	IRL520STRR (Vishay)
Manufacturer	Infineon Technologies	Infineon Technologies	Vishay Siliconix	Vishay Siliconix
Vdss (V)	100	100	100	100
Id @ 25°C (A)	10	10	9.2	9.2
Rds On Max @ 6A, 10V (mOhm)	180	180	270 @ 5.5A, 5V	270 @ 5.5A, 5V
Vgs(th) Max @ 250µA (V)	2	2	2	2
Qg Max @ 5V (nC)	20	20	12	12
Ciss Max @ 25V (pF)	440	440	490	490
Power Dissipation Max (W)	3.8 (Ta), 48 (Tc)	3.8 (Ta), 48 (Tc)	3.7 (Ta), 60 (Tc)	3.7 (Ta), 60 (Tc)
Operating Temperature (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)
Product Status	Obsolete	Not For New Designs	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant	Non-compliant

Engineering Selection Recommendations

IRL520NSTRLPBF (Infineon Technologies)

This part is a direct electrical equivalent to the IRL520NSTRL with identical electrical specifications. The primary distinction is RoHS3 compliance, making it suitable for applications requiring environmental compliance. Product status is listed as Not For New Designs, indicating limited long-term availability. This substitute is appropriate for legacy system maintenance and replacement applications where Infineon platform continuity is required.

IRL520STRL and IRL520STRR (Vishay Siliconix)

Both Vishay parts are functionally equivalent with the following considerations: continuous drain current is rated at 9.2A versus 10A for the Infineon parts, representing a 8% reduction in current capacity. On-state resistance is higher at 270mOhm compared to 180mOhm, resulting in increased power dissipation at equivalent current levels. Gate charge is lower at 12nC versus 20nC, providing faster switching characteristics. Both parts maintain the same voltage rating (100V), threshold voltage (2V), and operating temperature range (-55°C to 175°C). Both Vishay parts carry Active product status, ensuring ongoing availability and support. These substitutes are suitable for applications where the reduced current rating and higher on-state resistance are acceptable within circuit design margins.

Compliance Considerations

For applications requiring RoHS compliance, IRL520NSTRLPBF is the only compliant option among the listed substitutes. For legacy systems without compliance requirements, all four parts are functionally interchangeable within their specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can IRL520NSTRLPBF be used as a direct replacement for IRL520NSTRL?

A: Yes. IRL520NSTRLPBF is electrically and mechanically identical to IRL520NSTRL. Both are manufactured by Infineon Technologies with identical electrical specifications, gate charge, input capacitance, and power dissipation ratings. The primary difference is RoHS3 compliance status of the PBFR variant.

Q: What are the key differences between Infineon and Vishay substitute options?

A: Infineon substitutes (IRL520NSTRLPBF) maintain 10A continuous drain current and 180mOhm on-state resistance. Vishay substitutes (IRL520STRL and IRL520STRR) are rated for 9.2A continuous drain current and 270mOhm on-state resistance. Both Vishay parts feature lower gate charge (12nC versus 20nC) and higher input capacitance (490pF versus 440pF). Vishay parts carry Active product status, while Infineon PBFR is Not For New Designs.

Q: Are the Vishay IRL520STRL and IRL520STRR interchangeable?

A: Yes. Both Vishay parts are electrically and mechanically identical. The difference in part number designation (STRL versus STRR) reflects packaging or distribution channel variations, not electrical performance.

Q: What is the impact of using a 9.2A rated part in place of a 10A rated part?

A: The 8% reduction in continuous drain current rating requires circuit design verification. Applications operating at or near 10A continuous current must be re-evaluated to confirm operation within the 9.2A limit. The higher on-state resistance (270mOhm versus 180mOhm) results in increased power dissipation, requiring thermal management assessment.

Q: Are all substitute parts compatible with the D2PAK package footprint?

A: Yes. All substitute parts use the D2PAK (TO-263-3) surface mount package with identical pin configuration (2 Leads + Tab). PCB footprints and thermal pad designs are compatible across all listed parts.

Q: Which substitute should be selected for new design applications?

A: For new designs, Vishay IRL520STRL or IRL520STRR are recommended due to Active product status and assured long-term availability. Design margins must account for the 9.2A current rating and 270mOhm on-state resistance specifications.

Q: What is the significance of RoHS compliance in substitute selection?

A: RoHS3 compliance (IRL520NSTRLPBF) is required for applications subject to environmental regulations in specific markets. Non-compliant parts (IRL520NSTRL, IRL520STRL, IRL520STRR) are suitable for legacy systems and applications without regulatory compliance requirements.

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