LLSD101C-13 Equivalent & Substitute Parts

Part Overview

The LLSD101C-13 is a Schottky diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage with 15 mA average rectified current. The device is packaged in a Mini MELF (DO-213AA) surface mount configuration and features a 1 ns reverse recovery time, making it suitable for small signal applications requiring fast switching characteristics.

The LLSD101C-13 is classified as obsolete. Substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. The substitute parts listed below maintain electrical compatibility within the specified parameter ranges while offering active product status and improved availability.

Substiute Parts

LLSD101C-13

Diodes IncorporatedIn Stock: 854LLSD101C-13 Datasheet

Current PartRFQ

BAS81-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1353BAS81-GS08 Datasheet

MFR RecommendedRFQ

TMMBAT48FILM

STMicroelectronicsIn Stock: 75370TMMBAT48FILM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LLSD101C-13 are qualified based on the following electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Technology: Schottky diode
• Voltage - DC Reverse (Vr) (Max): 40 V (equal or greater)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Operating Temperature Range: Must encompass or exceed the original specification

Current Rating Consideration: Substitute parts may exceed the 15 mA average rectified current specification, as higher current ratings are backward compatible for applications requiring lower current operation. The forward voltage and reverse leakage characteristics must remain within acceptable limits for the intended circuit function.

Package Compatibility: The original LLSD101C-13 uses DO-213AA (Mini MELF) packaging. Substitute parts may use equivalent Mini MELF or SOD-80 MiniMELF packages, which share identical footprints and mounting characteristics for surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

BAS81-GS08 (Vishay General Semiconductor - Diodes Division)

The BAS81-GS08 is an active product offering direct electrical compatibility with the LLSD101C-13. Both devices share identical 40 V reverse voltage ratings and equivalent small signal speed classifications. The BAS81-GS08 provides a 30 mA current rating, which exceeds the original 15 mA specification while maintaining backward compatibility. The forward voltage specification of 1 V @ 15 mA is marginally higher than the original 900 mV, representing a 100 mV increase. The reverse leakage current remains at 200 nA, measured at the higher 40 V rating. The SOD-80 MiniMELF package shares identical footprint characteristics with the original DO-213AA Mini MELF package. This substitute is suitable for direct replacement in applications where the slightly elevated forward voltage is acceptable. ROHS3 compliance and unlimited moisture sensitivity level are maintained.

TMMBAT48FILM (STMicroelectronics)

The TMMBAT48FILM is an active product with identical 40 V reverse voltage rating and Mini MELF packaging. This device is rated for 350 mA average rectified current, significantly exceeding the original 15 mA specification. The forward voltage of 750 mV @ 200 mA is lower than the original specification, indicating improved efficiency characteristics. The reverse recovery time of 10 ns is slower than the original 1 ns specification, reflecting a fast recovery classification suitable for higher current applications. The reverse leakage current of 25 µA @ 40 V is substantially higher than the original 200 nA, which may impact low-power circuit performance. The operating temperature range extends to -65°C, providing enhanced low-temperature performance. This substitute is suitable for applications requiring higher current capacity and improved forward voltage characteristics, provided that the elevated reverse leakage current is acceptable for the circuit design. ROHS3 compliance and unlimited moisture sensitivity level are maintained.

Frequently Asked Questions (FAQ)

Q: Can the BAS81-GS08 be used as a direct replacement for the LLSD101C-13?

A: The BAS81-GS08 is electrically compatible for applications operating at or below 15 mA. Both devices share the same 40 V reverse voltage rating, small signal speed classification, and surface mount Mini MELF packaging. The forward voltage difference of 100 mV must be evaluated within the specific circuit context. The SOD-80 MiniMELF package is footprint-compatible with the original DO-213AA Mini MELF package.

Q: What is the primary difference between the BAS81-GS08 and TMMBAT48FILM?

A: The primary differences are current rating and reverse leakage characteristics. The BAS81-GS08 is rated for 30 mA with 200 nA reverse leakage, making it suitable for small signal applications. The TMMBAT48FILM is rated for 350 mA with 25 µA reverse leakage, making it suitable for higher current applications. The TMMBAT48FILM also features a lower forward voltage (750 mV) compared to both the original part (900 mV) and the BAS81-GS08 (1 V).

Q: Are there package compatibility concerns when substituting these parts?

A: The BAS81-GS08 uses SOD-80 MiniMELF packaging, which is footprint-compatible with the original DO-213AA Mini MELF package. The TMMBAT48FILM uses DO-213AA (Glass) packaging, which is identical to the original package designation. Both substitute parts are suitable for direct PCB placement without layout modifications.

Q: How does the reverse leakage current affect circuit performance?

A: The LLSD101C-13 and BAS81-GS08 both specify 200 nA reverse leakage current, suitable for precision analog circuits and low-power applications. The TMMBAT48FILM specifies 25 µA reverse leakage current, which is 125 times higher. In applications sensitive to leakage current, such as precision rectifiers or low-power detectors, the TMMBAT48FILM may introduce unacceptable circuit performance degradation.

Q: What compliance certifications are maintained across all substitute parts?

A: All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Both BAS81-GS08 and TMMBAT48FILM are classified as active products with current manufacturing support, ensuring long-term availability and supply chain continuity.

Q: Can the TMMBAT48FILM be used in applications designed for 15 mA operation?

A: The TMMBAT48FILM is rated for 350 mA and is backward compatible with lower current applications. However, the elevated reverse leakage current (25 µA) and higher capacitance (20 pF) may affect circuit performance in precision applications. Circuit validation is necessary to confirm acceptable performance with these parameter variations.

Q: What is the significance of the reverse recovery time specification?

A: The LLSD101C-13 specifies 1 ns reverse recovery time, indicating very fast switching characteristics suitable for high-frequency small signal applications. The TMMBAT48FILM specifies 10 ns, which is slower but still classified as fast recovery. The BAS81-GS08 does not specify reverse recovery time but is classified as small signal speed. For applications requiring the fastest switching performance, the LLSD101C-13 or equivalent 1 ns devices are preferred.