VLZ15-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ15-GS18 is a Zener Diode rated at 15 V with 500 mW power dissipation in a Surface Mount SOD-80 QuadroMELF package, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as Obsolete, indicating that direct procurement from original manufacturing channels may be limited. Identification of equivalent and substitute parts is necessary to ensure continued design support, maintain supply chain reliability, and facilitate component sourcing for new production runs or design revisions.

Substiute Parts

VLZ15-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 819VLZ15-GS18 Datasheet

Current PartRFQ

TLZ15-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 868TLZ15-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ15-GS18 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 15 V nominal
• Maximum power dissipation: 500 mW
• Maximum impedance: 16 Ohms
• Forward voltage: 1.5 V maximum at 200 mA
• Operating temperature range: -65°C to 175°C

Mechanical Equivalence Criteria:

• Surface Mount mounting type
• SOD-80 package family compatibility
• Automotive grade qualification
• AEC-Q101 certification
• RoHS3 compliance
• MSL 1 rating

The substitute part TLZ15-GS18 meets all electrical parameters identically and maintains full compliance with automotive and environmental standards. The primary distinction is the package variant designation (MiniMELF versus QuadroMELF) and product status (Active versus Obsolete), with both variants conforming to the SOD-80 standard.

Parameter Comparison

Engineering Selection Recommendations

The TLZ15-GS18 is a direct electrical and functional equivalent to the VLZ15-GS18. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, operating temperature range, and automotive-grade certifications including AEC-Q101 qualification.

The primary advantage of selecting TLZ15-GS18 is its Active product status, which ensures ongoing availability and manufacturing support. The VLZ15-GS18, classified as Obsolete, presents supply chain risk and may require expedited sourcing or inventory depletion strategies.

Both parts maintain full RoHS3 compliance and REACH compliance status, with identical moisture sensitivity ratings. The SOD-80 package family designation confirms mechanical and thermal compatibility for surface mount assembly processes.

For new designs or production revisions, TLZ15-GS18 is the recommended selection. For existing designs currently utilizing VLZ15-GS18, substitution to TLZ15-GS18 requires verification of printed circuit board layout compatibility with the MiniMELF package variant, though both conform to SOD-80 dimensional standards.

Frequently Asked Questions (FAQ)

Q: Are VLZ15-GS18 and TLZ15-GS18 electrically identical?

A: Yes. Both components have identical Zener voltage (15 V), power rating (500 mW), impedance (16 Ohms maximum), forward voltage characteristics (1.5 V @ 200 mA), and operating temperature range (-65°C to 175°C).

Q: What is the difference between QuadroMELF and MiniMELF package variants?

A: Both are SOD-80 package family variants manufactured by Vishay. The primary difference is physical size and lead configuration. QuadroMELF (VLZ15-GS18) and MiniMELF (TLZ15-GS18) have different footprints. PCB layout compatibility must be verified before substitution.

Q: Why is VLZ15-GS18 classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. This classification necessitates alternative sourcing strategies and may result in limited inventory availability.

Q: Can TLZ15-GS18 be used as a direct replacement in existing designs?

A: Electrical substitution is valid. Mechanical substitution requires PCB layout verification due to package variant differences between QuadroMELF and MiniMELF configurations.

Q: Are both parts automotive-qualified?

A: Yes. Both VLZ15-GS18 and TLZ15-GS18 carry Automotive grade classification and AEC-Q101 qualification, confirming suitability for automotive applications.

Q: What is the difference in packaging format between these parts?

A: VLZ15-GS18 is supplied in bulk packaging. TLZ15-GS18 is supplied in Tape & Reel (TR) format, which is standard for high-volume automated assembly processes.

Q: Do both parts meet RoHS and REACH compliance requirements?

A: Yes. Both components are ROHS3 Compliant and REACH Unaffected, confirming environmental and regulatory compliance.

Q: What is the moisture sensitivity rating for these components?

A: Both parts have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.