RB751S-40LP-TP Equivalent & Substitute Parts

Part Overview

The RB751S-40LP-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 30 V DC reverse voltage and 30 mA average rectified current in a surface mount SOD-882 package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts are selected based on matching or exceeding electrical performance parameters while maintaining compatible package and mounting specifications.

Substiute Parts

RB751S-40LP-TP

Micro Commercial CoIn Stock: 1009RB751S-40LP-TP Datasheet

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RB751S-40L2-TP

Micro Commercial CoIn Stock: 2139RB751S-40L2-TP Datasheet

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BAS3010S02LRHE6327XTSA1

Infineon TechnologiesIn Stock: 15433BAS3010S02LRHE6327XTSA1 Datasheet

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BAS40L,315

Nexperia USA Inc.In Stock: 128022BAS40L,315 Datasheet

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PMEG4002EL,315

Nexperia USA Inc.In Stock: 2023PMEG4002EL,315 Datasheet

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RB751CS40,315

Nexperia USA Inc.In Stock: 80386RB751CS40,315 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RB751S-40LP-TP are grouped based on the following substitution criteria:

Primary Substitution Criteria:

• Technology: Schottky rectifier diode
• Voltage - DC Reverse (Vr) (Max): Equal to or greater than 30 V
• Current - Average Rectified (Io): Equal to or greater than 30 mA
• Mounting Type: Surface Mount
• Package / Case: SOD-882 or equivalent surface mount package
• RoHS Status: ROHS3 Compliant

Substitution Logic: Parts are considered equivalent or suitable substitutes when they meet or exceed the reverse voltage and current ratings of the original part while maintaining surface mount technology and compatible packaging. Forward voltage characteristics and reverse leakage specifications are secondary parameters that may vary within acceptable ranges for the application category. Parts with higher current ratings or voltage ratings provide design margin and are acceptable substitutes. Package compatibility is maintained through SOD-882 and equivalent DFN1006-2 surface mount packages.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Active Status): The RB751S-40L2-TP from Micro Commercial Co is the primary active equivalent, offering the same manufacturer lineage and identical electrical characteristics at the 30 mA current rating. This part maintains the same forward voltage specification and is available in active production status with higher inventory availability (2096 pcs).

Higher Current Capacity Substitutes (Active Status): Parts BAS40L,315, PMEG4002EL,315, and RB751CS40,315 provide increased current handling capacity (120 mA to 200 mA) while maintaining or exceeding the 30 V reverse voltage requirement. These parts are manufactured by Nexperia USA Inc. and are in active production status. The RB751CS40,315 maintains identical forward voltage characteristics (370 mV @ 1 mA) to the original part, providing the closest electrical match with enhanced current capability.

Extended Temperature Range Substitute: The BAS3010S02LRHE6327XTSA1 from Infineon Technologies provides the same 30 V reverse voltage rating with significantly higher current capacity (1 A) and extended operating temperature range (-55°C to 150°C). This part is suitable for applications requiring higher thermal performance and current handling.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and REACH unaffected status, matching the original part's regulatory requirements. Parts BAS40L,315 and RB751CS40,315 include AEC-Q100 automotive qualification, providing additional reliability assurance for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can RB751S-40L2-TP directly replace RB751S-40LP-TP? A: Yes. The RB751S-40L2-TP is a direct equivalent from the same manufacturer with identical electrical specifications at the 30 mA rating. The primary difference is the package format (2-DFN1006 versus SOD-882), which are both surface mount technologies with compatible footprints for most applications. Verify PCB layout compatibility before substitution.

Q: What is the difference between SOD-882 and 0402 (1006 Metric) packages? A: Both are surface mount packages for small signal diodes. SOD-882 and DFN1006-2 are equivalent designations for the same physical package. The 0402 metric designation refers to the same package dimensions. These packages are mechanically and electrically compatible for PCB assembly.

Q: Can I use BAS40L,315 or PMEG4002EL,315 as substitutes? A: Yes. Both parts exceed the original specifications with higher reverse voltage (40 V) and current ratings (120 mA and 200 mA respectively). These parts are suitable substitutes for applications where the original 30 mA rating is adequate. The higher ratings provide design margin and improved reliability.

Q: Why does BAS3010S02LRHE6327XTSA1 have higher forward voltage? A: The BAS3010S02LRHE6327XTSA1 is rated for 1 A current capacity, which is significantly higher than the original 30 mA part. Forward voltage specifications are measured at different current levels; this part's 650 mV specification is measured at 1 A, whereas the original part's 370 mV is measured at 1 mA. At lower currents, the BAS3010 forward voltage would be lower.

Q: Are all substitute parts in active production? A: Yes. All listed substitute parts have active product status. The original RB751S-40LP-TP is obsolete, making active substitutes necessary for new designs and ongoing procurement.

Q: Do substitute parts require design re-qualification? A: Electrical compatibility is maintained across all substitutes within their specified parameter ranges. However, PCB layout changes due to package differences may require verification. Consult application-specific requirements and thermal management considerations for your design.

Q: Which substitute offers the best match to the original part? A: The RB751CS40,315 provides the closest electrical match with identical forward voltage characteristics (370 mV @ 1 mA) and reverse voltage (30 V at the original specification point), while offering higher current capacity (120 mA) and active production status. This part is suitable for direct substitution in most applications.