LL4001G L0G Equivalent & Substitute Parts

Part Overview

The LL4001G L0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount MELF package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

LL4001G L0G

Taiwan Semiconductor CorporationIn Stock: 719LL4001G L0G Datasheet

Current PartRFQ

S1D

YAGEOIn Stock: 6087S1D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LL4001G L0G is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed 50 V
• Current - Average Rectified (Io) rating must equal or exceed 1 A
• Voltage - Forward (Vf) characteristics must be compatible with circuit design specifications
• Recovery speed classification must match or exceed standard recovery performance

Mechanical Compatibility Criteria:

• Package type must be surface mount compatible
• Physical dimensions must accommodate existing PCB footprints

Compliance Criteria:

• RoHS3 compliance status
• Moisture Sensitivity Level (MSL) rating of 1 or equivalent

The substitute part S1D from YAGEO meets these substitution criteria and is available in active production status with full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The S1D from YAGEO is a qualified substitute for the obsolete LL4001G L0G based on the following factors:

Product Status: The S1D maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete LL4001G L0G.

Compliance Alignment: Both components carry identical ROHS3 compliance certification, ECCN classification (EAR99), and HTSUS code (8541.10.0080), confirming regulatory equivalence.

Moisture Sensitivity: Both components are rated MSL 1 (Unlimited), indicating identical moisture handling and storage requirements.

Electrical Performance: The S1D demonstrates superior voltage rating (200 V versus 50 V), providing enhanced design margin for applications requiring the LL4001G L0G specifications. Forward voltage characteristics are equivalent at 1.1 V.

Package Compatibility: Both components utilize surface mount packages (MELF and DO-214AC respectively), suitable for modern PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the S1D directly replace the LL4001G L0G in existing designs?

A: The S1D is electrically compatible for applications requiring the LL4001G L0G electrical specifications. The S1D package type (DO-214AC) differs from the original MELF package (DO-213AB), requiring PCB footprint verification before implementation.

Q: What is the primary reason for substitution?

A: The LL4001G L0G is classified as obsolete. The S1D provides functional equivalence with active production status and full compliance certifications.

Q: Are there compliance differences between the two parts?

A: No. Both components carry identical ROHS3 compliance, EAR99 ECCN classification, and MSL 1 rating.

Q: Does the S1D voltage rating of 200 V affect circuit compatibility?

A: The higher voltage rating of the S1D (200 V versus 50 V) does not negatively impact circuits designed for 50 V operation. The component operates safely within lower voltage specifications.

Q: What package considerations apply to substitution?

A: The LL4001G L0G uses DO-213AB MELF packaging, while the S1D uses DO-214AC packaging. Physical dimensions and PCB footprints differ; layout verification is required before component substitution.

Q: Is inventory availability a factor in selecting the S1D?

A: The S1D maintains significantly higher inventory availability (5993 Pcs) compared to the obsolete LL4001G L0G (609 Pcs), supporting sustained procurement requirements.