IRLR120NTRLPBF N-Channel 100V 10A MOSFET Equivalent & Substitute Parts

Part Overview

The IRLR120NTRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 100V drain-to-source voltage and 10A continuous drain current in the TO-252AA (DPAK) surface mount package. This device is part of the HEXFET® series and is classified as Not For New Designs, indicating obsolescence in the original product line. Equivalent and substitute parts are necessary for ongoing production support, design flexibility, and inventory management when the primary part becomes unavailable or when alternative manufacturers' components meet the same electrical and mechanical specifications.

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) @ 6A, 10V	185	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	2	V
Gate Charge (Qg) @ 5V	20	nC
Power Dissipation (Max)	48	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	Surface Mount
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the IRLR120NTRLPBF is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): 100V minimum
Continuous Drain Current (Id): 10A or greater at 25°C
Package Type: TO-252-3 (DPAK) surface mount
FET Type: N-Channel MOSFET
Gate Threshold Voltage (Vgs(th)): 2V nominal at 250µA
On-State Resistance (Rds On): 185mOhm or lower @ specified conditions
Operating Temperature Range: -55°C to 150°C minimum

Parametric Equivalents are parts from the same or different manufacturers that match all primary criteria within the allowed tolerances and maintain identical package geometry and pinout.

Functional Substitutes are parts that exceed the minimum current or power dissipation ratings while maintaining voltage class, package type, and thermal operating range, allowing direct replacement in applications where the original part is unavailable.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Pd Max (W)	Temp Range (°C)	Package	Status
IRLR120NTRLPBF	Infineon	100	10	185 @ 6A, 10V	20 @ 5V	48	-55 to 175	TO-252AA	Not For New Designs
IRLR120NTRPBF	Infineon	100	10	185 @ 6A, 10V	20 @ 5V	48	-55 to 175	TO-252AA	Active
FQD13N10LTM	onsemi	100	10	180 @ 5A, 10V	12 @ 5V	40	-55 to 150	TO-252AA	Active
IRLR120TRPBF	Vishay Siliconix	100	7.7	270 @ 4.6A, 5V	12 @ 5V	42	-55 to 150	TO-252	Active
IRLR120TRLPBF	Vishay Siliconix	100	7.7	270 @ 4.6A, 5V	12 @ 5V	42	-55 to 150	TO-252	Active
BUK7275-100A,118	Nexperia USA Inc.	100	21.7	75 @ 13A, 10V	—	89	-55 to 175	DPAK	Obsolete
FDD1600N10ALZ	onsemi	100	6.8	160 @ 3.4A, 10V	3.61 @ 10V	14.9	-55 to 150	TO-252AA	Active

Engineering Selection Recommendations

Parametric Equivalent (Recommended Primary Substitute):

IRLR120NTRPBF (Infineon Technologies) is the direct parametric equivalent to IRLR120NTRLPBF. Both parts share identical electrical specifications, package geometry, and thermal characteristics. IRLR120NTRPBF carries Active product status, ensuring continued availability and manufacturing support. This part is ROHS3 compliant and maintains the same operating temperature range (-55°C to 175°C). Selection of IRLR120NTRPBF eliminates design risk and provides the highest compatibility for direct replacement applications.

Active Alternatives (Functional Substitutes):

FQD13N10LTM (onsemi) meets the 100V/10A electrical specification with equivalent on-state resistance (180mOhm vs. 185mOhm) and maintains TO-252AA package compatibility. This part is Active and ROHS3 compliant. Operating temperature range is -55°C to 150°C, which is acceptable for most applications within the original part's thermal envelope.

IRLR120TRPBF and IRLR120TRLPBF (Vishay Siliconix) are Active variants with identical base product number but lower continuous drain current rating (7.7A vs. 10A). These parts are suitable only for applications where the actual operating current does not exceed 7.7A. Both are ROHS3 compliant with -55°C to 150°C operating range.

Higher Current Alternative (Functional Upgrade):

BUK7275-100A,118 (Nexperia USA Inc.) provides superior current handling (21.7A) and lower on-state resistance (75mOhm), making it suitable for applications requiring higher current capacity within the same 100V voltage class. This part is Obsolete but maintains DPAK package compatibility and -55°C to 175°C operating range. Selection requires verification that the higher current rating does not introduce thermal management complications in the target application.

Lower Current Alternative (Functional Downgrade):

FDD1600N10ALZ (onsemi) is rated for 6.8A continuous drain current, below the original 10A specification. This part is suitable only for applications where actual operating current remains below 6.8A. It offers lower power dissipation (14.9W) and reduced gate charge (3.61nC), which may benefit low-power switching applications.

Product Status Considerations:

Parts with Active status (IRLR120NTRPBF, FQD13N10LTM, IRLR120TRPBF, IRLR120TRLPBF) are recommended for new designs and ongoing production. The original IRLR120NTRLPBF is classified as Not For New Designs, and BUK7275-100A,118 is Obsolete; these should be used only for legacy system support or when inventory constraints require their use.

Frequently Asked Questions (FAQ)

Q: Can IRLR120NTRPBF be used as a direct replacement for IRLR120NTRLPBF?

A: Yes. IRLR120NTRPBF is a parametric equivalent with identical electrical specifications (100V, 10A, 185mOhm Rds On, 48W power dissipation) and package type (TO-252AA). The primary difference is product status: IRLR120NTRPBF is Active, while IRLR120NTRLPBF is Not For New Designs. Direct pin-for-pin and functional replacement is supported.

Q: What is the difference between IRLR120TRPBF and IRLR120NTRLPBF?

A: Both parts share the same base product number (IRLR120) and 100V voltage rating, but differ in continuous drain current rating. IRLR120NTRLPBF is rated for 10A, while IRLR120TRPBF is rated for 7.7A. IRLR120TRPBF is suitable only for applications where actual operating current does not exceed 7.7A. Both use TO-252 DPAK packaging and are ROHS3 compliant.

Q: Is FQD13N10LTM compatible with IRLR120NTRLPBF?

A: FQD13N10LTM is functionally compatible for applications operating at or below 10A continuous drain current. Both parts are rated for 100V and use TO-252AA packaging. On-state resistance is comparable (180mOhm vs. 185mOhm). Operating temperature range differs slightly (FQD13N10LTM: -55°C to 150°C vs. IRLR120NTRLPBF: -55°C to 175°C). Compatibility depends on whether the application requires the full 175°C upper temperature limit.

Q: Can BUK7275-100A,118 replace IRLR120NTRLPBF?

A: BUK7275-100A,118 can replace IRLR120NTRLPBF in applications where higher current capacity (21.7A vs. 10A) and lower on-state resistance (75mOhm vs. 185mOhm) are beneficial or neutral. Both parts use DPAK packaging and are rated for 100V. However, BUK7275-100A,118 is Obsolete, and its higher current rating may introduce thermal design considerations. Replacement is not recommended for new designs.

Q: What does "Not For New Designs" mean for IRLR120NTRLPBF?

A: "Not For New Designs" indicates that the manufacturer (Infineon) has discontinued active development and marketing of this part. While existing inventory may be available, the part is not recommended for new product designs. Designers should select Active alternatives such as IRLR120NTRPBF or FQD13N10LTM to ensure long-term supply chain stability and manufacturing support.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant (IRLR120NTRPBF, FQD13N10LTM, IRLR120TRPBF, IRLR120TRLPBF). BUK7275-100A,118 is also ROHS3 compliant. Verification of RoHS compliance is required for applications subject to regulatory requirements. The original IRLR120NTRLPBF is ROHS3 compliant.

Q: What is the significance of packaging variants (CT, TR, Tube)?

A: Packaging variants indicate the form in which parts are supplied: Cut Tape (CT) and Digi-Reel® are standard reel formats for automated assembly; Tape & Reel (TR) is a continuous reel format; Tube packaging is for manual handling. All variants use identical TO-252AA (DPAK) component geometry and are electrically equivalent. Selection depends on assembly equipment compatibility and inventory management requirements, not electrical performance.

Q: Can FDD1600N10ALZ be used in high-current applications?

A: No. FDD1600N10ALZ is rated for 6.8A continuous drain current, which is below the original IRLR120NTRLPBF specification of 10A. This part is suitable only for applications where actual operating current remains below 6.8A. Use in higher-current applications risks device failure and thermal damage.

Q: What is the operating temperature difference between substitute parts?

A: IRLR120NTRLPBF operates from -55°C to 175°C. Most onsemi and Vishay alternatives (FQD13N10LTM, IRLR120TRPBF, IRLR120TRLPBF) operate from -55°C to 150°C, a 25°C reduction in upper temperature limit. BUK7275-100A,118 maintains the full -55°C to 175°C range. Applications requiring operation above 150°C must use IRLR120NTRPBF or BUK7275-100A,118.

Q: How do gate charge differences affect circuit performance?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. IRLR120NTRLPBF has 20nC gate charge, while FQD13N10LTM has 12nC and IRLR120TRPBF has 12nC. Lower gate charge reduces switching losses and allows faster switching speeds. Substitution with lower gate charge parts improves efficiency but requires verification that gate driver circuits can supply the required current within the target switching frequency.

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