VLZ4V3-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ4V3-GS18 is a Zener diode rated at 4.3 V nominal voltage with 500 mW maximum power dissipation in a SOD-80 QuadroMELF surface mount package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as Automotive grade with AEC-Q101 qualification. The part is currently listed as Obsolete, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

VLZ4V3-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 826VLZ4V3-GS18 Datasheet

Current PartRFQ

TLZ4V3-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 960TLZ4V3-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ4V3-GS18 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 4.3 V nominal
• Maximum power dissipation: 500 mW
• Maximum impedance: 40 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 classification
• AEC-Q101 qualification
• RoHS3 compliance
• MSL 1 rating

The substitute part TLZ4V3-GS18 meets all electrical parameters identically. The mechanical difference lies in the specific SOD-80 variant: the main part uses QuadroMELF geometry while the substitute uses MiniMELF geometry. Both variants fall within the SOD-80 package family and maintain surface mount compatibility. The substitute part is Active status, providing ongoing availability.

Parameter Comparison

Engineering Selection Recommendations

The TLZ4V3-GS18 is a direct electrical equivalent to the VLZ4V3-GS18 with identical performance specifications across all rated parameters. Both components are manufactured by Vishay General Semiconductor - Diodes Division and carry Automotive grade classification with AEC-Q101 qualification, ensuring suitability for automotive applications.

The primary distinction is product status: the VLZ4V3-GS18 is Obsolete, while the TLZ4V3-GS18 is Active. This status difference, combined with the substitute's higher inventory availability (895 Pcs versus 760 Pcs), establishes the TLZ4V3-GS18 as the recommended selection for new designs and ongoing production requirements.

Both parts maintain identical RoHS3 compliance and MSL 1 ratings. The SOD-80 package family compatibility between QuadroMELF and MiniMELF variants ensures mechanical interchangeability in surface mount applications, provided PCB layout accommodates the specific footprint geometry of the selected variant.

Frequently Asked Questions (FAQ)

Q: Can the TLZ4V3-GS18 replace the VLZ4V3-GS18 in existing designs?

A: Yes. The TLZ4V3-GS18 provides identical electrical performance across all specified parameters: 4.3 V nominal zener voltage, 500 mW maximum power, 40 Ohms maximum impedance, and -65°C to 175°C operating range. Both components are Automotive grade with AEC-Q101 qualification. PCB footprint compatibility must be confirmed, as the parts use different SOD-80 variants (QuadroMELF versus MiniMELF).

Q: What is the difference between SOD-80 QuadroMELF and SOD-80 MiniMELF?

A: Both are SOD-80 package variants used for surface mount diodes. QuadroMELF and MiniMELF differ in physical dimensions and lead geometry. The specific footprint requirements depend on PCB design. Consult the manufacturer datasheets for precise dimensional specifications to ensure compatibility with your circuit board layout.

Q: Why is the VLZ4V3-GS18 listed as Obsolete?

A: Product obsolescence is determined by the manufacturer based on production decisions and market demand. The Obsolete status indicates that the VLZ4V3-GS18 is no longer in active production. The TLZ4V3-GS18, with Active status, represents the current production equivalent.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the VLZ4V3-GS18 and TLZ4V3-GS18 are classified as Automotive grade and carry AEC-Q101 qualification, meeting automotive industry standards for reliability and performance.

Q: Do both parts have the same compliance certifications?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. They share identical regulatory and environmental compliance profiles.

Q: What inventory considerations apply to these parts?

A: The VLZ4V3-GS18 has 760 Pcs in stock but is Obsolete. The TLZ4V3-GS18 has 895 Pcs in stock and is Active. For new production and long-term availability, the TLZ4V3-GS18 is the appropriate selection.