BAS40SL Equivalent & Substitute Parts

Part Overview

The BAS40SL is a Schottky diode manufactured by onsemi, rated for 40 V DC reverse voltage and 100 mA average rectified current in a surface mount SOD-923F package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. The BAS40SL serves applications requiring small-signal Schottky rectification with fast switching characteristics and low forward voltage drop.

Substiute Parts

BAS40SL

onsemiIn Stock: 1688BAS40SL Datasheet

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BAS40P2T5G

onsemiIn Stock: 3966BAS40P2T5G Datasheet

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NSR0140P2T5G

onsemiIn Stock: 31706NSR0140P2T5G Datasheet

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NSR0340P2T5G

onsemiIn Stock: 29270NSR0340P2T5G Datasheet

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BAS40L-G3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 6601BAS40L-G3-08 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BAS40SL is determined by the following critical parameters: voltage rating (40 V DC reverse), current rating (100 mA average rectified), package type (SOD-923 or compatible), and compliance certifications (ROHS3, REACH Unaffected). Substitute parts must maintain electrical compatibility within the application's voltage and current requirements while meeting the same regulatory standards.

The substitute parts are grouped into two categories:

Category 1: Same Package (SOD-923) with Matching or Higher Current Ratings Parts BAS40P2T5G and NSR0340P2T5G maintain the SOD-923 package footprint and 40 V voltage rating. These parts support higher current ratings (200 mA) compared to the BAS40SL (100 mA), making them suitable for applications requiring increased current capacity within the same voltage class.

Category 2: Lower Voltage Rating (30 V) Part NSR0140P2T5G operates at 30 V maximum reverse voltage with 70 mA current rating. This part is suitable only for applications where the circuit voltage does not exceed 30 V.

Category 3: Alternative Package (DFN1006) with Matching Voltage and Higher Current Part BAS40L-G3-08 provides 40 V voltage rating and 200 mA current capacity in a DFN1006-2A package (0402 metric equivalent). This part requires PCB layout modification due to package change but maintains electrical performance parameters.

Parameter Comparison

Engineering Selection Recommendations

For Direct Footprint Replacement (SOD-923 Package):

BAS40P2T5G is the primary equivalent for the BAS40SL. Both parts share the SOD-923 package, 40 V voltage rating, and onsemi manufacturer origin. BAS40P2T5G is active in production with higher inventory availability (3917 pcs) compared to the obsolete BAS40SL. This part requires no PCB layout modification and maintains full electrical compatibility for applications operating at or below 100 mA.

NSR0340P2T5G provides an alternative SOD-923 solution with doubled current capacity (200 mA) at the same 40 V voltage rating. This part is suitable for applications requiring higher current margins or future design scaling. The faster reverse recovery time (3 ns versus 8 ns) may provide performance benefits in high-frequency switching applications.

For Voltage-Constrained Applications:

NSR0140P2T5G operates at 30 V maximum reverse voltage with 70 mA current rating. This part is suitable only for circuits where the applied voltage does not exceed 30 V. The lower forward voltage (350 mV @ 1 mA) provides reduced power dissipation in low-current applications.

For Alternative Package Requirement (DFN1006):

BAS40L-G3-08 provides 40 V voltage rating and 200 mA current capacity in a DFN1006-2A package. This part requires PCB layout redesign due to package change from SOD-923 to 0402 metric equivalent. Selection of this part is appropriate when space constraints or manufacturing process requirements mandate the smaller DFN1006 package.

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and supply chain compatibility with the original BAS40SL specification.

Frequently Asked Questions (FAQ)

Q: Can BAS40P2T5G directly replace BAS40SL in existing designs?

A: Yes. BAS40P2T5G maintains the SOD-923 package footprint, 40 V voltage rating, and onsemi manufacturer origin. No PCB layout modification is required. BAS40P2T5G is active in production, addressing the obsolescence of BAS40SL.

Q: What is the difference between BAS40P2T5G and NSR0340P2T5G?

A: Both parts operate at 40 V and use the SOD-923 package. NSR0340P2T5G supports 200 mA current (versus unspecified rating for BAS40P2T5G) and features faster reverse recovery time (3 ns versus unspecified). NSR0340P2T5G is suitable for applications requiring higher current capacity or faster switching performance.

Q: Is NSR0140P2T5G suitable as a substitute for BAS40SL?

A: NSR0140P2T5G is suitable only for applications where the circuit voltage does not exceed 30 V. The part operates at 30 V maximum reverse voltage, which is lower than the BAS40SL 40 V rating. Current capacity (70 mA) is also lower than BAS40SL (100 mA). Use this part only when voltage and current requirements are within these limits.

Q: Can BAS40L-G3-08 replace BAS40SL without PCB modification?

A: No. BAS40L-G3-08 uses a DFN1006-2A package (0402 metric equivalent), which differs from the BAS40SL SOD-923 package. PCB layout redesign is required. Selection of this part is appropriate only when package change is acceptable or required by design constraints.

Q: What are the key parameters for determining substitution compatibility?

A: Substitution compatibility is determined by: (1) voltage rating must equal or exceed the application requirement, (2) current rating must equal or exceed the application requirement, (3) package footprint must match or be acceptable for redesign, (4) regulatory compliance (ROHS3, REACH) must be maintained, and (5) operating temperature range must encompass the application environment.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (BAS40P2T5G, NSR0140P2T5G, NSR0340P2T5G, BAS40L-G3-08) are ROHS3 compliant and REACH Unaffected, matching the regulatory status of the original BAS40SL.

Q: What is the inventory status of substitute parts?

A: BAS40P2T5G has 3917 pcs in stock. NSR0140P2T5G has 31683 pcs in stock. NSR0340P2T5G has 29200 pcs in stock. BAS40L-G3-08 has 6517 pcs in stock. All substitute parts are available in active production status.