IRL3103STRL Equivalent & Substitute Parts

Part Overview

The IRL3103STRL is an N-Channel 30V 64A MOSFET manufactured by Infineon Technologies in D2PAK surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The IRL3103STRL operates across a temperature range of -55°C to 175°C and delivers 94W maximum power dissipation at the case temperature. Substitution requires matching the core electrical parameters: 30V drain-source voltage rating, D2PAK package compatibility, and thermal/current handling characteristics within acceptable design margins.

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	D2PAK (TO-263-3)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the IRL3103STRL is determined by strict adherence to the following electrical and mechanical parameters:

Primary Matching Criteria:

Drain-Source Voltage (Vdss): 30V (exact match required)
Package Type: D2PAK surface mount (TO-263-3 compatible)
FET Type: N-Channel MOSFET
Operating Temperature Range: -55°C to 175°C minimum
Mounting: Surface Mount

Secondary Compatibility Parameters:

Gate drive voltage compatibility (4.5V and 10V operation)
Vgs(th) threshold voltage within acceptable gate drive margins
Rds On characteristics suitable for thermal and current handling
Gate charge and input capacitance within circuit design tolerances

The two substitute parts listed below meet these criteria with variations in continuous drain current rating and on-resistance characteristics. Selection depends on application current requirements and thermal design constraints.

Parameter Comparison

Parameter	IRL3103STRL (Main)	PSMN017-30BL,118	PSMN4R3-30BL,118	Unit
Manufacturer	Infineon Technologies	Nexperia USA Inc.	Nexperia USA Inc.	—
Drain to Source Voltage (Vdss)	30	30	30	V
Continuous Drain Current (Id) @ 25°C	64	32	100	A
Rds On (Max)	12 @ 34A, 10V	17 @ 10A, 10V	4.1 @ 15A, 10V	mOhm
Gate Threshold Voltage (Vgs(th))	1 @ 250µA	2.15 @ 1mA	2.15 @ 1mA	V
Gate Charge (Qg)	33 @ 4.5V	10.7 @ 10V	41.5 @ 10V	nC
Input Capacitance (Ciss)	1650 @ 25V	552 @ 15V	2400 @ 15V	pF
Power Dissipation (Max)	94	47	103	W
Operating Temperature Range	-55 to 175	-55 to 175	-55 to 175	°C
Package Type	D2PAK (TO-263-3)	D2PAK (TO-263-3)	D2PAK (TO-263-3)	—
Product Status	Obsolete	Obsolete	Active	—
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

PSMN4R3-30BL,118 (Primary Substitute): This part is the preferred substitute for applications requiring equivalent or higher current handling. The PSMN4R3-30BL,118 delivers 100A continuous drain current against the IRL3103STRL's 64A rating, providing design margin for thermal and current stress. The on-resistance of 4.1 mOhm at 15A, 10V is superior to the IRL3103STRL's 12 mOhm specification, resulting in lower power dissipation and improved thermal performance. This device carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. The higher gate charge (41.5 nC) and input capacitance (2400 pF) require verification against gate driver capabilities but remain within standard industrial gate drive specifications.

PSMN017-30BL,118 (Derating Substitute): This part is suitable for applications where the IRL3103STRL's 64A rating exceeds actual circuit requirements. The PSMN017-30BL,118 provides 32A continuous drain current with reduced power dissipation (47W) and lower gate charge (10.7 nC), making it advantageous for gate-drive-limited or thermally constrained designs. The higher on-resistance (17 mOhm) and lower input capacitance (552 pF) represent trade-offs in switching efficiency but maintain full voltage rating compatibility. This device is classified as Obsolete but carries ROHS3 compliance.

Both substitutes maintain the 30V Vdss rating, D2PAK package compatibility, and -55°C to 175°C operating temperature range required for direct substitution. Selection between these options depends on application current requirements and thermal design constraints.

Frequently Asked Questions (FAQ)

Q: Can the PSMN4R3-30BL,118 directly replace the IRL3103STRL in all applications?

A: The PSMN4R3-30BL,118 is electrically compatible for direct substitution in applications operating at or below 64A continuous drain current. The superior current rating (100A) and lower on-resistance (4.1 mOhm) provide design margin. However, the higher gate charge (41.5 nC versus 33 nC) and input capacitance (2400 pF versus 1650 pF) must be verified against gate driver output impedance and switching frequency to ensure gate drive circuit stability.

Q: Is the PSMN017-30BL,118 suitable for high-current applications?

A: No. The PSMN017-30BL,118 is rated for 32A continuous drain current, which is below the IRL3103STRL's 64A specification. This part is appropriate only for applications where actual circuit current requirements are 32A or lower. Using this part in circuits designed for 64A operation will result in thermal stress and potential device failure.

Q: What is the impact of different Rds On values on circuit performance?

A: On-resistance directly affects power dissipation and thermal performance. The PSMN4R3-30BL,118 (4.1 mOhm) dissipates significantly less power than the IRL3103STRL (12 mOhm) at equivalent current levels, improving thermal margins. The PSMN017-30BL,118 (17 mOhm) exhibits higher dissipation but operates at lower absolute power due to its 32A current limit. Circuit thermal design must account for these differences.

Q: Are there package compatibility concerns between these parts?

A: All three parts use identical D2PAK (TO-263-3) surface mount packaging with the same pinout and thermal tab configuration. PCB layout and thermal management designs are directly compatible without modification.

Q: What is the significance of product status (Obsolete versus Active)?

A: The PSMN4R3-30BL,118 carries Active status, indicating ongoing manufacturing and long-term availability. The IRL3103STRL and PSMN017-30BL,118 are classified as Obsolete, meaning production has ended. For new designs, the PSMN4R3-30BL,118 is the recommended choice to ensure supply chain continuity.

Q: Do RoHS compliance differences affect substitution decisions?

A: Both Nexperia substitutes are ROHS3 compliant, while the IRL3103STRL is non-compliant. For applications subject to RoHS regulations or customer requirements, either Nexperia part satisfies compliance requirements. The IRL3103STRL may only be used in applications explicitly exempted from RoHS requirements.

Q: How do gate threshold voltage differences impact circuit operation?

A: The IRL3103STRL has a lower threshold voltage (1V @ 250µA) compared to both substitutes (2.15V @ 1mA). This difference affects gate drive margin and switching behavior. Gate driver circuits must be verified to reliably drive the substitute parts to full on-state at the specified Vgs levels (4.5V and 10V).

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