IPB05N03LB N-Channel 30V 80A MOSFET Equivalent & Substitute Parts

Part Overview

The IPB05N03LB is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 30V drain-to-source voltage and 80A continuous drain current in a Surface Mount D2PAK package. This device is part of the OptiMOS™ series and is classified as discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications.

The primary reason for identifying substitute parts is the discontinued product status, which restricts availability for new procurement. Equivalent devices must maintain compatibility across electrical ratings, package form factor, and thermal characteristics to ensure direct replacement capability in existing circuit designs.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	80	A (Tc)
On-State Resistance (Rds On Max) @ 60A, 10V	5	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 40µA	2	V
Gate Charge (Qg Max) @ 5V	25	nC
Power Dissipation (Max)	94	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-263-3, D2PAK	Surface Mount
RoHS Status	Non-compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the IPB05N03LB is determined by the following critical parameters:

Electrical Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
Continuous Drain Current (Id): Must equal or exceed 80A at 25°C
On-State Resistance (Rds On): Must not significantly exceed 5mOhm to maintain thermal performance
Gate Threshold Voltage (Vgs(th)): Must fall within acceptable switching characteristics (approximately 1V to 2.25V range)
Operating Temperature Range: Must support -55°C to 175°C

Mechanical Compatibility Criteria:

Package Type: Must be D2PAK (TO-263-3) Surface Mount configuration
Mounting Type: Surface Mount only

Regulatory Compliance:

RoHS Status: Compliance preferred for new designs
REACH Status: All candidates are REACH Unaffected

The substitute parts listed below satisfy these criteria with varying degrees of performance enhancement or trade-offs in specific parameters.

Parameter Comparison

Parameter	IPB05N03LB	IRF3709ZSTRRPBF	IRL3803STRLPBF	PSMN4R3-30BL,118	PSMN017-30BL,118
Manufacturer	Infineon	Infineon	Infineon	Nexperia	Nexperia
Vdss (V)	30	30	30	30	30
Id @ 25°C (A)	80	87	140	100	32
Rds On Max (mOhm)	5 @ 60A, 10V	6.3 @ 21A, 10V	6 @ 71A, 10V	4.1 @ 15A, 10V	17 @ 10A, 10V
Vgs(th) Max (V)	2 @ 40µA	2.25 @ 250µA	1 @ 250µA	2.15 @ 1mA	2.15 @ 1mA
Qg Max (nC)	25 @ 5V	26 @ 4.5V	140 @ 4.5V	41.5 @ 10V	10.7 @ 10V
Power Dissipation Max (W)	94 (Tc)	79 (Tc)	200 (Tc)	103 (Tc)	47 (Tc)
Operating Temp (°C)	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175
Package	D2PAK	D2PAK	D2PAK	D2PAK	D2PAK
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Not For New Designs	Not For New Designs	Active	Obsolete

Engineering Selection Recommendations

Primary Recommendation: PSMN4R3-30BL,118

The PSMN4R3-30BL,118 from Nexperia is the preferred substitute for the IPB05N03LB. This device exceeds the minimum current requirement (100A vs. 80A), maintains superior on-state resistance (4.1mOhm vs. 5mOhm), and carries Active product status with ROHS3 compliance. The D2PAK package provides direct mechanical compatibility. Current inventory of 10,750 units ensures supply continuity.

Secondary Recommendation: IRF3709ZSTRRPBF

The IRF3709ZSTRRPBF from Infineon provides a near-equivalent alternative with 87A continuous drain current and comparable on-state resistance (6.3mOhm). ROHS3 compliance and Infineon manufacturing heritage support legacy system compatibility. However, product status is classified as Not For New Designs, limiting suitability for new development.

Alternative for High-Current Applications: IRL3803STRLPBF

The IRL3803STRLPBF offers significantly higher current capacity (140A) and superior power dissipation (200W), suitable for applications requiring thermal headroom or current margin. On-state resistance of 6mOhm remains acceptable. ROHS3 compliance and D2PAK packaging ensure compatibility. Product status is Not For New Designs.

Not Recommended: PSMN017-30BL,118

The PSMN017-30BL,118 does not meet the minimum current requirement (32A vs. 80A required) and exhibits elevated on-state resistance (17mOhm). Product status is Obsolete. This device is unsuitable for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the PSMN4R3-30BL,118 directly replace the IPB05N03LB without circuit modification?

A: Yes. Both devices share identical Vdss (30V), compatible Vgs(th) characteristics, D2PAK package configuration, and operating temperature range. The PSMN4R3-30BL,118 exceeds the current rating (100A vs. 80A), providing margin. No circuit redesign is required.

Q: Why is the IRL3803STRLPBF not the primary recommendation despite higher current capacity?

A: While the IRL3803STRLPBF offers superior current handling (140A) and power dissipation (200W), its product status is Not For New Designs. The PSMN4R3-30BL,118 carries Active status, ensuring long-term availability and supply chain stability. For new designs, Active-status devices are preferred.

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

A: RoHS3 compliance indicates adherence to current environmental and material restriction standards. The original IPB05N03LB is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, supporting regulatory requirements for new production and export markets.

Q: Are there thermal performance differences between the IPB05N03LB and PSMN4R3-30BL,118?

A: The PSMN4R3-30BL,118 exhibits lower on-state resistance (4.1mOhm vs. 5mOhm), resulting in reduced conduction losses and improved thermal performance. Power dissipation rating is 103W vs. 94W. Both devices operate within -55°C to 175°C, ensuring thermal compatibility in existing thermal management designs.

Q: Can the PSMN017-30BL,118 be used in lower-current circuit variants?

A: The PSMN017-30BL,118 is not suitable for applications designed around the IPB05N03LB's 80A rating. Its 32A maximum current is insufficient. Additionally, its 17mOhm on-state resistance introduces significant conduction losses compared to the original 5mOhm specification. Obsolete product status further restricts its use.

Q: What packaging considerations apply to these substitutes?

A: All substitute parts use the D2PAK (TO-263-3) Surface Mount package, identical to the IPB05N03LB. PCB footprints, thermal pad dimensions, and lead spacing are compatible. No layout modifications are required for direct substitution.

Q: How do gate charge differences affect circuit performance?

A: The IPB05N03LB specifies 25nC gate charge at 5V. Substitutes range from 10.7nC (PSMN017) to 140nC (IRL3803). Lower gate charge reduces driver power dissipation and switching losses. Higher gate charge may require driver current verification but does not prevent substitution if the existing driver can supply adequate current.

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