IRFR48ZTRLPBF N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFR48ZTRLPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage with 42A continuous drain current at 25°C. This device is housed in a TO-252AA (DPAK) surface mount package and is part of the HEXFET® series. The part is designated as "Not For New Designs," indicating it has been superseded in Infineon's product portfolio. Equivalent and substitute parts are necessary for applications requiring continued supply, design flexibility, or performance optimization within the same electrical and mechanical constraints.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	55	V
Continuous Drain Current (Id) @ 25°C	42	A (Tc)
On-Resistance (Rds On) @ 37A, 10V	11	mOhm
Gate Threshold Voltage (Vgs(th)) @ 50µA	4	V
Gate Charge (Qg) @ 10V	60	nC
Power Dissipation (Max)	91	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 IRFR48ZTRLPBF is determined by the following critical parameters:

Electrical Compatibility Requirements:

Drain-to-Source Voltage (Vdss) must be equal to or greater than 55V
Continuous Drain Current (Id) must be equal to or greater than 42A at 25°C
On-Resistance (Rds On) must not exceed the application's thermal and efficiency requirements
Gate Threshold Voltage (Vgs(th)) must be compatible with the drive circuit
Operating temperature range must encompass -55°C to 175°C

Mechanical Compatibility Requirements:

Package type must be TO-252-3 (DPAK) surface mount
Pin configuration must be identical (2 Leads + Tab)
Mounting footprint must be compatible with existing PCB layouts

Regulatory Compliance:

RoHS3 compliance required
Moisture Sensitivity Level (MSL) of 1 (Unlimited) preferred for handling consistency

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and functional alternatives (meeting or exceeding electrical requirements with different performance characteristics).

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Qg (nC)	Power Diss. (W)	Package	Status
IRFR48ZTRLPBF	Infineon	55	42 (Tc)	11 @ 37A, 10V	4 @ 50µA	60 @ 10V	91 (Tc)	TO-252-3	Not For New Designs
IRFR48ZTRPBF	Infineon	55	42 (Tc)	11 @ 37A, 10V	4 @ 50µA	60 @ 10V	91 (Tc)	TO-252-3	Active
DMTH6009LK3Q-13	Diodes Inc.	60	59 (Tc)	10 @ 13.5A, 10V	2 @ 250µA	33.5 @ 10V	60 (Tc)	TO-252-3	Active
DMTH6010LK3-13	Diodes Inc.	60	70 (Tc)	8 @ 20A, 10V	3 @ 250µA	41.3 @ 10V	3.1 (Ta)	TO-252-3	Active
DMTH6010LK3Q-13	Diodes Inc.	60	70 (Tc)	8 @ 20A, 10V	3 @ 250µA	41.3 @ 10V	31 (Ta)	TO-252-3	Active
IXTY90N055T2	IXYS	55	90 (Tc)	8.4 @ 25A, 10V	4 @ 250µA	42 @ 10V	150 (Tc)	TO-252-3	Active
STD60NF55LT4	STMicroelectronics	55	60 (Tc)	15 @ 30A, 10V	2 @ 250µA	56 @ 5V	100 (Tc)	TO-252-3	Active
STD65N55F3	STMicroelectronics	55	80 (Tc)	8.5 @ 32A, 10V	4 @ 250µA	45 @ 10V	110 (Tc)	TO-252-3	Active
STD70N6F3	STMicroelectronics	60	70 (Tc)	10.5 @ 35A, 10V	4 @ 250µA	35 @ 10V	110 (Tc)	TO-252-3	Obsolete

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement):

IRFR48ZTRPBF is the direct parametric equivalent to IRFR48ZTRLPBF. Both parts share identical electrical specifications (55V, 42A, 11mOhm Rds On, 91W power dissipation) and package configuration. The primary distinction is product status: IRFR48ZTRPBF is Active, whereas IRFR48ZTRLPBF is designated Not For New Designs. This part is suitable for applications requiring no design modification and is available in higher inventory quantities (10,506 pcs vs. 3,300 pcs).

Functional Alternatives with Enhanced Performance:

IXTY90N055T2 (IXYS) and STD65N55F3 (STMicroelectronics) both maintain the 55V Vdss rating and offer significantly higher continuous drain current (90A and 80A respectively) compared to the original 42A specification. Both are housed in TO-252-3 packages and are Active products. These alternatives provide improved thermal performance and lower on-resistance, suitable for applications where higher current capacity or reduced power dissipation is beneficial.

STD60NF55LT4 (STMicroelectronics) provides 55V operation at 60A continuous current with Active product status. This part represents a mid-range alternative between the original 42A specification and higher-current options.

Higher Voltage Alternatives:

DMTH6010LK3Q-13 (Diodes Incorporated) and STD70N6F3 (STMicroelectronics) operate at 60V Vdss, exceeding the original 55V specification. Both support 70A continuous drain current and are housed in TO-252-3 packages. DMTH6010LK3Q-13 carries AEC-Q101 automotive qualification and is Active. STD70N6F3 is Obsolete and should not be selected for new applications.

Compliance Considerations:

All recommended active substitutes maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing supply chain and manufacturing processes. DMTH6010LK3Q-13 includes AEC-Q101 automotive qualification, suitable for automotive and high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can IRFR48ZTRPBF be used as a direct replacement for IRFR48ZTRLPBF?

A: Yes. IRFR48ZTRPBF is a parametric equivalent with identical electrical specifications and package configuration. The only difference is product status (Active vs. Not For New Designs). No circuit modifications are required.

Q: What is the primary reason to select a substitute part?

A: The IRFR48ZTRLPBF is designated "Not For New Designs," indicating Infineon has discontinued active development and support. Substitute parts ensure continued supply availability and access to active product support. IRFR48ZTRPBF provides identical performance with Active status.

Q: Can higher-current alternatives like IXTY90N055T2 or STD65N55F3 be used in place of the original part?

A: Yes, provided the application circuit can accommodate the different on-resistance and gate charge characteristics. Both parts maintain 55V Vdss operation and TO-252-3 packaging. Lower on-resistance (8.4mOhm and 8.5mOhm respectively vs. 11mOhm) reduces power dissipation. Gate charge differences (42nC and 45nC vs. 60nC) may affect switching speed. Thermal design must account for higher power dissipation capability (150W and 110W vs. 91W).

Q: Are 60V-rated alternatives compatible with 55V applications?

A: Yes. Higher voltage ratings provide additional design margin and are electrically compatible with 55V applications. DMTH6010LK3Q-13 and STD70N6F3 both operate at 60V and support 70A continuous current. Verify that the application circuit does not depend on the lower voltage rating for component selection or protection scheme design.

Q: What is the significance of the TO-252-3 (DPAK) package specification?

A: The TO-252-3 package is a surface mount configuration with two signal leads and one tab (thermal connection). All substitute parts listed maintain this identical package footprint, ensuring PCB compatibility without layout modifications. Package compliance is mandatory for direct substitution.

Q: Does on-resistance (Rds On) variation affect circuit performance?

A: Yes. Lower on-resistance reduces power dissipation and heat generation. The original part specifies 11mOhm at 37A and 10V. Alternatives range from 8mOhm to 15mOhm depending on measurement conditions. Lower values improve efficiency; higher values increase thermal load. Verify thermal design margins when selecting parts with different Rds On specifications.

Q: What is the importance of gate charge (Qg) in substitution decisions?

A: Gate charge affects switching speed and drive circuit requirements. The original part specifies 60nC at 10V. Alternatives range from 33.5nC to 56nC. Lower gate charge enables faster switching and reduces drive circuit power consumption. Higher gate charge may require stronger drive circuits. Verify drive circuit capability when selecting parts with significantly different Qg values.

Q: Is AEC-Q101 qualification required for all applications?

A: No. AEC-Q101 automotive qualification is required only for automotive and high-reliability applications. DMTH6010LK3Q-13 includes this qualification. Standard industrial applications do not require this certification. Verify application requirements before selecting qualified parts.

Q: Why is STD70N6F3 listed if it is Obsolete?

A: STD70N6F3 is included in the comparison for reference purposes only. This part is Obsolete and should not be selected for new designs or ongoing production. Active alternatives such as DMTH6010LK3Q-13 or STD65N55F3 are recommended instead.

Q: Can packaging type be changed during substitution?

A: No. All substitute parts must maintain TO-252-3 (DPAK) surface mount packaging to ensure PCB footprint compatibility. Packaging changes require PCB redesign and are outside the scope of direct substitution.

Q: What compliance certifications are maintained across all substitute parts?

A: All active substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. These certifications ensure compatibility with modern manufacturing processes and supply chain requirements. Verify specific compliance requirements for your application before final part selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message