STB70NF03LT4 Equivalent & Substitute Parts

Part Overview

The STB70NF03LT4 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 30V drain-to-source voltage with 70A continuous drain current at 25°C. This device is part of the STripFET™ II series and is classified as Active product status. The component is housed in a D2PAK surface mount package and is suitable for high-current switching applications requiring efficient thermal management.

Substitute parts are identified based on matching electrical specifications including drain-to-source voltage rating, package type, and operating temperature range. Alternative devices may be required due to inventory constraints, supply chain considerations, or design optimization for specific application parameters.

Substiute Parts

STB70NF03LT4

STMicroelectronicsIn Stock: 25184STB70NF03LT4 Datasheet

Current PartRFQ

PSMN017-30BL,118

Nexperia USA Inc.In Stock: 2850PSMN017-30BL,118 Datasheet

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PSMN4R3-30BL,118

Nexperia USA Inc.In Stock: 10797PSMN4R3-30BL,118 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STB70NF03LT4 are qualified based on the following criteria:

Matching Parameters:

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

Substitution Logic: Parts are grouped as equivalent or substitute based on electrical compatibility within the 30V voltage class and D2PAK package constraint. Continuous drain current (Id) and on-resistance (Rds On) characteristics may vary between substitute parts, affecting application suitability for specific current and thermal requirements. All substitute parts maintain compliance with RoHS3 and REACH standards.

Parameter Comparison

Engineering Selection Recommendations

PSMN4R3-30BL,118 (Nexperia USA Inc.): This part is suitable as a direct substitute for the STB70NF03LT4 in applications requiring equal or higher continuous drain current capability. The PSMN4R3-30BL,118 provides 100A continuous drain current compared to the main part's 70A, with superior on-resistance characteristics (4.1 mOhm versus 9.5 mOhm). Both devices maintain identical voltage ratings, operating temperature range, and D2PAK packaging. The PSMN4R3-30BL,118 carries Active product status and full RoHS3 compliance. This substitute is appropriate for designs where higher current capacity or lower conduction losses provide system benefits.

PSMN017-30BL,118 (Nexperia USA Inc.): This part is a limited substitute for the STB70NF03LT4, suitable only for applications with reduced current requirements. The PSMN017-30BL,118 is rated for 32A continuous drain current, significantly lower than the main part's 70A specification. This device carries Obsolete product status, indicating discontinued manufacturing and potential supply constraints. The higher on-resistance (17 mOhm versus 9.5 mOhm) and lower power dissipation rating (47W versus 100W) restrict its use to lower-power applications. RoHS3 compliance and D2PAK packaging are maintained. Selection of this substitute should be limited to legacy system support or applications with confirmed current requirements below 32A.

Frequently Asked Questions (FAQ)

Q: Can the PSMN4R3-30BL,118 be used as a direct replacement for the STB70NF03LT4?

A: Yes, the PSMN4R3-30BL,118 is electrically compatible as a substitute. Both devices share identical 30V drain-to-source voltage ratings, D2PAK surface mount packaging, and -55°C to 175°C operating temperature range. The PSMN4R3-30BL,118 provides higher continuous drain current (100A versus 70A) and lower on-resistance, making it suitable for equivalent or higher-current applications.

Q: What are the limitations of using the PSMN017-30BL,118 as a substitute?

A: The PSMN017-30BL,118 has significantly reduced current capability (32A versus 70A) and higher on-resistance (17 mOhm versus 9.5 mOhm). Additionally, this part carries Obsolete product status, indicating discontinued production. Use this substitute only in applications with confirmed current requirements below 32A and where supply availability is confirmed.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes, all listed substitute parts use the D2PAK (TO-263-3) surface mount package, ensuring mechanical and thermal interface compatibility with existing PCB designs. Pin configuration and lead spacing are identical across all parts.

Q: Do the substitute parts meet the same compliance standards as the main part?

A: Yes, all substitute parts listed are RoHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the STB70NF03LT4.

Q: How do gate charge differences affect circuit design?

A: Gate charge (Qg) varies between parts: STB70NF03LT4 (30 nC @ 5V), PSMN4R3-30BL,118 (41.5 nC @ 10V), and PSMN017-30BL,118 (10.7 nC @ 10V). Higher gate charge requires greater driver current and switching time. Applications with fast switching requirements or current-limited gate drivers should verify compatibility with the specific gate charge specification of the selected substitute.

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

A: On-resistance directly affects conduction losses and thermal dissipation. The PSMN4R3-30BL,118 (4.1 mOhm) provides lower losses than the main part (9.5 mOhm), reducing heat generation. The PSMN017-30BL,118 (17 mOhm) exhibits higher losses. Selection should account for thermal budget and efficiency requirements of the application.