IRL3103PBF N-Channel 30V 64A MOSFET Equivalent & Substitute Parts

Part Overview

The IRL3103PBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage and 64A continuous drain current in a TO-220AB through-hole package. This device is classified as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning. The HEXFET® series designation indicates advanced gate oxide technology for enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	64	A
Rds On (Max) @ 34A, 10V	12	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	1	V
Gate Charge (Qg) @ 4.5V	33	nC
Input Capacitance (Ciss) @ 25V	1650	pF
Power Dissipation (Max)	94	W
Operating Temperature Range	-55 to 175	°C
Package Type	TO-220AB	Through Hole
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the IRL3103PBF is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain-to-Source Voltage (Vdss): Must equal 30V
Package Type: Must be TO-220AB through-hole configuration
FET Type: Must be N-Channel MOSFET
Operating Temperature Range: Must support -55°C to 175°C
RoHS3 Compliance: Required for regulatory alignment

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Substitute must meet or exceed application requirements
On-Resistance (Rds On): Lower values indicate improved performance; higher values require thermal analysis
Gate Charge (Qg): Affects switching speed and driver requirements
Input Capacitance (Ciss): Influences gate drive circuit design

The substitute parts listed below satisfy the primary criteria and are evaluated based on their electrical performance relative to the original specification.

Parameter Comparison

Parameter	IRL3103PBF	IRLB8721PBF	PSMN022-30PL,127	Unit
Manufacturer	Infineon Technologies	Infineon Technologies	Nexperia USA Inc.	—
Product Status	Obsolete	Active	Obsolete	—
Vdss	30	30	30	V
Id (Continuous) @ 25°C	64	62	30	A
Rds On (Max)	12 @ 34A, 10V	8.7 @ 31A, 10V	22 @ 5A, 10V	mOhm
Vgs(th) (Max)	1 @ 250µA	2.35 @ 25µA	2.15 @ 1mA	V
Gate Charge (Qg) @ 4.5V	33	13	9	nC
Ciss (Max)	1650 @ 25V	1077 @ 15V	447 @ 15V	pF
Power Dissipation (Max)	94	65	41	W
Operating Temperature	-55 to 175	-55 to 175	-55 to 175	°C
Package	TO-220AB	TO-220AB	TO-220AB	—
RoHS3 Compliance	Yes	Yes	Yes	—
Vgs (Max)	±16	±20	±20	V

Engineering Selection Recommendations

IRLB8721PBF (Infineon Technologies) - Primary Substitute

The IRLB8721PBF is the manufacturer-recommended substitute for the IRL3103PBF. Both devices are manufactured by Infineon Technologies and share identical voltage ratings (30V Vdss) and package configuration (TO-220AB). The IRLB8721PBF is currently in active production status, ensuring long-term availability and supply chain stability. This device demonstrates superior on-resistance performance (8.7 mOhm versus 12 mOhm), resulting in lower conduction losses and reduced thermal dissipation requirements. The continuous drain current rating of 62A closely matches the original 64A specification, making this substitute suitable for applications where the IRL3103PBF was previously specified. Gate charge is significantly reduced (13 nC versus 33 nC), enabling faster switching characteristics and reduced driver power consumption. Both devices maintain identical operating temperature ranges (-55°C to 175°C) and RoHS3 compliance status.

PSMN022-30PL,127 (Nexperia USA Inc.) - Secondary Substitute

The PSMN022-30PL,127 is a Nexperia-manufactured N-Channel MOSFET with identical 30V Vdss rating and TO-220AB package configuration. This device is suitable for applications where continuous drain current requirements do not exceed 30A. The PSMN022-30PL,127 exhibits significantly lower input capacitance (447 pF versus 1650 pF) and gate charge (9 nC versus 33 nC), advantageous for high-frequency switching applications and reduced gate driver complexity. However, the on-resistance specification (22 mOhm) is higher than the original device, requiring thermal analysis for applications with sustained high current operation. This substitute is appropriate for lower-current variants of designs originally using the IRL3103PBF or for applications where gate drive efficiency is prioritized over conduction losses.

Selection Criteria Summary:

For direct replacement with maintained performance: IRLB8721PBF
For reduced gate drive requirements in lower-current applications: PSMN022-30PL,127
Compliance verification: All substitutes maintain RoHS3 compliance and REACH unaffected status
Thermal considerations: Verify power dissipation requirements against substitute device ratings

Frequently Asked Questions (FAQ)

Q: Can the IRLB8721PBF directly replace the IRL3103PBF in existing designs?

A: Yes. Both devices share identical voltage ratings (30V Vdss), package configuration (TO-220AB), and operating temperature range (-55°C to 175°C). The IRLB8721PBF is the manufacturer-recommended substitute. The lower on-resistance (8.7 mOhm versus 12 mOhm) and reduced gate charge (13 nC versus 33 nC) represent performance improvements. No circuit modifications are required for direct substitution.

Q: What are the limitations of using PSMN022-30PL,127 as a substitute?

A: The PSMN022-30PL,127 is rated for 30A continuous drain current, compared to the original 64A specification. This device is suitable only for applications where the actual current requirement does not exceed 30A. The higher on-resistance (22 mOhm) results in increased conduction losses and thermal dissipation. This substitute is appropriate for lower-power variants or designs where gate drive efficiency is prioritized.

Q: Are all substitute parts available in the same packaging?

A: Yes. All listed substitutes use the TO-220AB through-hole package configuration, ensuring mechanical and thermal interface compatibility with existing PCB designs and heat sink mounting arrangements.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. All substitute parts are RoHS3 compliant and REACH unaffected, matching the regulatory status of the original IRL3103PBF. ECCN and HTSUS classifications remain consistent across all listed devices.

Q: How do gate charge differences affect circuit design?

A: The IRLB8721PBF exhibits 13 nC gate charge versus 33 nC for the original device, while the PSMN022-30PL,127 has 9 nC. Lower gate charge reduces the energy required per switching cycle and decreases gate driver power consumption. Existing gate driver circuits designed for the IRL3103PBF will operate with improved efficiency margins when driving the substitute devices.

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

A: On-resistance directly affects conduction losses and thermal dissipation. The IRLB8721PBF (8.7 mOhm) provides lower losses than the original (12 mOhm), reducing heat generation. The PSMN022-30PL,127 (22 mOhm) generates higher losses and requires thermal analysis for applications with sustained high current operation. Selection depends on application current levels and thermal management capabilities.

Q: Can these substitutes be used interchangeably in all applications?

A: No. Substitution suitability depends on specific application requirements. The IRLB8721PBF is suitable for direct replacement across the full current range. The PSMN022-30PL,127 is limited to applications with continuous drain current not exceeding 30A. Thermal analysis is required when substituting devices with different on-resistance specifications.

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