LL41-GS18 Equivalent & Substitute Parts

Part Overview

The LL41-GS18 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 V DC reverse voltage and 100 mA average rectified current in a surface mount SOD-80 MiniMELF package. This component is classified as Active product status and carries automotive-grade qualification under AEC-Q101. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set, enabling procurement flexibility and supply chain continuity.

Substiute Parts

LL41-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 781LL41-GS18 Datasheet

Current PartRFQ

LL41-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1803LL41-GS08 Datasheet

Parametric EquivalentRFQ

TMMBAT41FILM

STMicroelectronicsIn Stock: 97990TMMBAT41FILM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LL41-GS18 are qualified based on strict electrical and mechanical parameter equivalence. The substitution logic is structured as follows:

Parametric Equivalents maintain identical specifications across all critical parameters: reverse voltage rating (100 V), average rectified current (100 mA), forward voltage characteristics (1 V @ 200 mA), reverse leakage current (100 nA @ 50 V), junction capacitance (2 pF @ 1 V, 1 MHz), and surface mount package configuration (SOD-80 MiniMELF). These parts are interchangeable without circuit redesign.

Direct Manufacturer Equivalents satisfy the same electrical performance envelope and package footprint compatibility but may originate from different manufacturers. Compatibility is confirmed when reverse voltage, rectified current, reverse leakage, and capacitance parameters align with the main part specification, and the package type supports identical PCB mounting.

The following parameters determine substitution eligibility:

• Voltage - DC Reverse (Vr) (Max): 100 V
• Current - Average Rectified (Io): 100 mA
• Current - Reverse Leakage @ Vr: 100 nA @ 50 V
• Capacitance @ Vr, F: 2 pF @ 1 V, 1 MHz
• Mounting Type: Surface Mount
• Package Compatibility: SOD-80 MiniMELF or equivalent footprint

Parameter Comparison

Engineering Selection Recommendations

LL41-GS08 is a parametric equivalent manufactured by Vishay General Semiconductor. All electrical specifications, package configuration, and compliance certifications are identical to the LL41-GS18. This part is suitable for direct substitution in applications where Vishay sourcing is preferred or where supply availability of the LL41-GS18 is constrained. Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance.

TMMBAT41FILM is a direct manufacturer equivalent produced by STMicroelectronics. This part satisfies the core electrical requirements: 100 V reverse voltage rating, 100 mA rectified current capacity, 100 nA reverse leakage, and 2 pF junction capacitance. The package type is Mini MELF (DO-213AA glass variant), which maintains footprint compatibility with SOD-80 MiniMELF applications. The forward voltage characteristic differs at the specified test point (450 mV @ 1 mA versus 1 V @ 200 mA), but both values fall within acceptable Schottky diode performance ranges for this current class. The TMMBAT41FILM provides an extended operating temperature range (−65°C to 125°C) compared to the LL41-GS18 maximum junction temperature specification of 125°C. This part carries ROHS3 compliance and MSL 1 rating, matching the main part's environmental qualifications.

Selection between these substitutes is determined by supply chain requirements, manufacturer preference, and inventory availability. All three parts are Active status and suitable for new design implementation.

Frequently Asked Questions (FAQ)

Q: Can LL41-GS08 replace LL41-GS18 in existing designs?

A: Yes. The LL41-GS08 is a parametric equivalent with identical electrical specifications, package configuration, and compliance certifications. No circuit modification is required.

Q: What is the difference between LL41-GS08 and TMMBAT41FILM?

A: Both parts meet the core electrical requirements (100 V, 100 mA, 100 nA leakage, 2 pF capacitance). LL41-GS08 is manufactured by Vishay and maintains identical forward voltage characteristics to the LL41-GS18. TMMBAT41FILM is manufactured by STMicroelectronics and features a lower forward voltage at 1 mA test point (450 mV) and an extended operating temperature range (−65°C to 125°C). Package types are both Mini MELF variants with compatible PCB footprints.

Q: Are all substitute parts automotive-qualified?

A: The LL41-GS18 and LL41-GS08 carry AEC-Q101 automotive qualification. The TMMBAT41FILM does not list AEC-Q101 qualification in the provided specifications. Automotive applications requiring AEC-Q101 certification should use LL41-GS08 as the substitute.

Q: What is the package compatibility between SOD-80 and Mini MELF?

A: SOD-80 and Mini MELF (DO-213AC and DO-213AA) are equivalent package designations for surface mount diodes with identical lead spacing and PCB footprint dimensions. These packages are mechanically and electrically interchangeable.

Q: Do all substitute parts have the same moisture sensitivity rating?

A: Yes. The LL41-GS18, LL41-GS08, and TMMBAT41FILM all carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity constraints during storage and handling.

Q: Can TMMBAT41FILM be used in applications requiring the extended temperature range?

A: The TMMBAT41FILM operating temperature range is −65°C to 125°C, which extends below the LL41-GS18 specification of 125°C maximum junction temperature. This part is suitable for applications requiring low-temperature operation. However, applications requiring AEC-Q101 certification must use LL41-GS08.