LLSD101C-7 Equivalent & Substitute Parts

Part Overview

The LLSD101C-7 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 DO-213AC Mini MELF (SOD-80) surface mount configuration and operates across a junction temperature range of -55°C to 125°C.

This part is classified as obsolete. Identifying equivalent and substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this Schottky rectifier diode.

Substiute Parts

LLSD101C-7

Diodes IncorporatedIn Stock: 22890LLSD101C-7 Datasheet

Current PartRFQ

SD101CW-7-F

Diodes IncorporatedIn Stock: 17833SD101CW-7-F Datasheet

MFR RecommendedRFQ

LL101C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1020LL101C-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LLSD101C-7 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40 V
• Current - Average Rectified (Io): Must equal or exceed 15 mA
• Voltage - Forward (Vf) (Max) @ If: Must not exceed 900 mV @ 15 mA
• Reverse Recovery Time (trr): Must equal or be faster than 1 ns
• Current - Reverse Leakage @ Vr: Must not exceed 200 nA @ 30 V
• Capacitance @ Vr, F: Must not exceed 2.2 pF @ 0V, 1MHz

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Technology: Schottky
• Operating Temperature - Junction: Must support the required operating range

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Two substitute parts meet these criteria with differing package configurations and product status classifications.

Parameter Comparison

Engineering Selection Recommendations

SD101CW-7-F (Diodes Incorporated)

The SD101CW-7-F is an active product from the same manufacturer as the obsolete LLSD101C-7. It provides identical electrical performance across all critical parameters: 40 V reverse voltage, 15 mA average rectified current, 900 mV forward voltage drop, and 1 ns reverse recovery time. The primary difference is the package configuration: SD101CW-7-F uses SOD-123 surface mount packaging instead of the Mini MELF (SOD-80) package of the original part. This substitution requires PCB layout modification to accommodate the different package footprint. The extended operating temperature range (-65°C to 125°C) provides additional low-temperature margin. ROHS3 compliance and MSL 1 rating match the original specification. This substitute is recommended for new designs or redesigns where package footprint changes are acceptable.

LL101C-GS18 (Vishay General Semiconductor - Diodes Division)

The LL101C-GS18 maintains the same Mini MELF (SOD-80) package configuration as the LLSD101C-7, eliminating the need for PCB layout modification. Electrical parameters are equivalent or superior: 40 V reverse voltage, 30 mA average rectified current (exceeds the 15 mA requirement), 900 mV forward voltage drop, and 1 ns reverse recovery time. This part carries automotive-grade qualification (AEC-Q101) and is an active product. ROHS3 compliance and MSL 1 rating are maintained. The higher current rating provides design margin for applications with variable load conditions. This substitute is recommended for direct replacement in existing designs where package compatibility is a priority.

Both substitutes satisfy all electrical and mechanical requirements. Selection between them depends on whether package footprint compatibility or automotive qualification is the primary design constraint.

Frequently Asked Questions (FAQ)

Q: Can SD101CW-7-F directly replace LLSD101C-7 without PCB modification?

A: No. SD101CW-7-F uses SOD-123 packaging while LLSD101C-7 uses Mini MELF (SOD-80) packaging. These packages have different footprints and pin configurations. PCB layout modification is required.

Q: Can LL101C-GS18 directly replace LLSD101C-7 without PCB modification?

A: Yes. LL101C-GS18 uses the same Mini MELF (SOD-80) package as LLSD101C-7. The footprint and pin configuration are compatible, allowing direct substitution on existing PCBs.

Q: Are the electrical characteristics of both substitutes identical to LLSD101C-7?

A: Both substitutes meet or exceed the electrical specifications of LLSD101C-7. SD101CW-7-F provides identical performance at 15 mA. LL101C-GS18 provides superior current handling at 30 mA while maintaining the same voltage and switching characteristics.

Q: What is the difference in operating temperature range between the substitutes?

A: LLSD101C-7 operates from -55°C to 125°C. SD101CW-7-F extends the lower limit to -65°C. LL101C-GS18 specifies 125°C as the maximum junction temperature without a defined minimum. For applications requiring -55°C operation, both substitutes are suitable.

Q: Does LL101C-GS18 automotive qualification affect its use in non-automotive applications?

A: No. Automotive qualification (AEC-Q101) indicates additional testing and reliability screening. Parts qualified to automotive standards are suitable for all applications, including non-automotive use.

Q: Are both substitutes RoHS3 compliant?

A: Yes. Both SD101CW-7-F and LL101C-GS18 are ROHS3 compliant, matching the compliance status of LLSD101C-7.

Q: What is the moisture sensitivity level (MSL) for both substitutes?

A: Both substitutes carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. This matches the original part specification.

Q: Which substitute should be selected for a new design?

A: For new designs, SD101CW-7-F is recommended if package size reduction is beneficial. LL101C-GS18 is recommended if automotive-grade reliability is required or if the existing Mini MELF footprint is already established in the design.

Q: Can both substitutes be used interchangeably in the same design?

A: No. The two substitutes use different packages (SOD-123 vs. Mini MELF). A design must select one substitute and maintain consistent PCB footprints throughout production.