DB2S31400L Equivalent & Substitute Parts

Part Overview

The DB2S31400L is a Schottky diode manufactured by Panasonic Electronic Components, rated for 30 V DC reverse voltage and 30 mA average rectified current in a surface mount SSMini2-F5-B package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production needs. Substitute parts must maintain compatibility with the original electrical specifications and physical package constraints while considering current product availability and manufacturing status.

Substiute Parts

DB2S31400L

Panasonic Electronic ComponentsIn Stock: 128299DB2S31400L Datasheet

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BAT54WX-TP

Micro Commercial CoIn Stock: 9474BAT54WX-TP Datasheet

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NSV1SS400T1G

onsemiIn Stock: 21385NSV1SS400T1G Datasheet

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PMEG3010EB,115

Nexperia USA Inc.In Stock: 20094PMEG3010EB,115 Datasheet

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RB510SM-30FHT2R

Rohm SemiconductorIn Stock: 13932RB510SM-30FHT2R Datasheet

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RB510SM-30T2R

Rohm SemiconductorIn Stock: 56410RB510SM-30T2R Datasheet

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RB520S30T1G

onsemiIn Stock: 185453RB520S30T1G Datasheet

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RB751S40T5G

onsemiIn Stock: 1982RB751S40T5G Datasheet

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SBAT54XV2T1G

onsemiIn Stock: 18206SBAT54XV2T1G Datasheet

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SBR0230T5-7

Diodes IncorporatedIn Stock: 1573SBR0230T5-7 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DB2S31400L is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 30 V
• Package / Case: Must be SC-79 or SOD-523 for physical compatibility
• Mounting Type: Must be Surface Mount
• Current - Average Rectified (Io): Must equal or exceed 30 mA
• Technology: Schottky or Super Barrier technology preferred for forward voltage characteristics
• RoHS Status: Must be RoHS3 Compliant or RoHS Compliant

Acceptable Parameter Variations:

• Current - Average Rectified (Io): Substitute parts rated for higher current (200 mA, 1 A) are acceptable as they provide design margin
• Voltage - Forward (Vf): Substitute parts with lower forward voltage provide improved efficiency
• Reverse Recovery Time (trr): Faster recovery times are acceptable
• Operating Temperature Range: Extended temperature ranges provide additional design flexibility
• Reverse Leakage Current: Variations are acceptable within the same voltage class

Substitute parts are grouped into three categories based on current rating alignment with the original 30 mA specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

RB751S40T5G (onsemi) is the closest functional equivalent to the DB2S31400L. This part maintains the identical 30 V / 30 mA rating, operates within the same temperature range (-55°C to 150°C), and is manufactured in the SOD-523 package. The part is currently in Active product status with ROHS3 compliance. Forward voltage characteristics are superior at 0.37 V @ 1 mA compared to the original 1.0 V @ 30 mA specification.

Secondary Substitutes (Higher Current Rating):

RB520S30T1G (onsemi) and SBR0230T5-7 (Diodes Incorporated) provide 200 mA current ratings with 30 V reverse voltage in SOD-523 packages. Both parts are Active status with ROHS3 compliance. These substitutes are suitable for applications where the original 30 mA specification provides insufficient design margin. RB520S30T1G offers 0.6 V forward voltage @ 200 mA, while SBR0230T5-7 (Super Barrier technology) provides 0.61 V @ 200 mA.

PMEG3010EB,115 (Nexperia USA Inc.) provides 1 A current rating at 30 V with automotive-grade AEC-Q100 qualification. This part is suitable for applications requiring higher current capacity and automotive reliability standards. Forward voltage is 0.68 V @ 1 A.

Tertiary Substitutes (Rohm Semiconductor):

RB510SM-30T2R (Rohm Semiconductor) provides 100 mA at 30 V in SOD-523 package with Active product status. This part offers intermediate current capacity between the original 30 mA and higher-rated alternatives.

Not Recommended for New Designs:

RB510SM-30FHT2R (Rohm Semiconductor) carries "Not For New Designs" product status and should not be selected for new applications despite electrical compatibility.

Voltage Mismatch:

NSV1SS400T1G (onsemi) operates at 100 V reverse voltage, exceeding the 30 V specification of the original part. This substitute is suitable only for applications where higher voltage rating is required and forward voltage characteristics (1.2 V @ 100 mA) are acceptable.

Frequently Asked Questions (FAQ)

Q: Can RB751S40T5G directly replace DB2S31400L without circuit modifications?

A: Yes. RB751S40T5G maintains identical voltage (30 V) and current (30 mA) ratings, operates in the same SOD-523 package, and provides superior forward voltage characteristics (0.37 V @ 1 mA versus 1.0 V @ 30 mA). No circuit modifications are required.

Q: What is the difference between Schottky and Super Barrier diode technologies in these substitutes?

A: Both technologies are suitable for this application. Schottky diodes (RB751S40T5G, RB520S30T1G, BAT54WX-TP, SBAT54XV2T1G) and Super Barrier diodes (SBR0230T5-7) provide low forward voltage drop and fast switching characteristics. Super Barrier technology offers slightly improved performance in specific applications.

Q: Why do some substitutes have higher current ratings (200 mA, 1 A) than the original 30 mA specification?

A: Higher current ratings provide design margin and thermal headroom in applications where the original 30 mA specification is marginal. Substitutes with higher current ratings operate at lower junction temperatures under the same load conditions, improving reliability and component lifespan.

Q: Is the SOD-523 package physically compatible with the original SSMini2-F5-B package?

A: Yes. The SC-79 designation refers to the SOD-523 package outline. All substitute parts listed use SOD-523 packaging, which is physically compatible with the original SSMini2-F5-B supplier package designation.

Q: What is the significance of ROHS3 compliance versus RoHS Compliant status?

A: ROHS3 Compliant indicates compliance with the most current RoHS 3 directive (2015/863/EU), which includes restrictions on phthalates. RoHS Compliant indicates compliance with earlier RoHS directives. ROHS3 Compliant parts are preferred for new designs and long-term supply chain stability.

Q: Can BAT54WX-TP or SBAT54XV2T1G be used as substitutes despite higher forward voltage (0.8 V @ 100 mA)?

A: Yes. Both parts provide 30 V / 200 mA ratings in SOD-523 packages with Active product status. The higher forward voltage (0.8 V @ 100 mA) compared to the original (1.0 V @ 30 mA) is acceptable for most applications. Circuit performance impact depends on specific application requirements.

Q: Should NSV1SS400T1G be selected for 30 V applications?

A: NSV1SS400T1G is not recommended for direct replacement of DB2S31400L. This part operates at 100 V reverse voltage, which exceeds the original 30 V specification. Selection should be limited to applications requiring higher voltage ratings. The forward voltage (1.2 V @ 100 mA) is also higher than preferred alternatives.

Q: What is the inventory status of substitute parts?

A: RB751S40T5G (1,970 Pcs), RB520S30T1G (185,400 Pcs), PMEG3010EB,115 (20,000 Pcs), and SBR0230T5-7 (1,517 Pcs) are currently in stock. Inventory levels should be verified with suppliers for production quantities exceeding available stock.

Q: Are automotive-grade qualifications (AEC-Q100, AEC-Q101) required for this application?

A: Automotive qualifications are not required unless the application is automotive-specific. PMEG3010EB,115 carries AEC-Q100 qualification, and RB510SM-30T2R carries AEC-Q101 qualification. These certifications provide additional reliability assurance for demanding applications.