VLZ12-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ12-GS18 is a Zener diode rated at 12 V nominal voltage with 500 mW power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This component is packaged in SOD-80 QuadroMELF surface mount configuration and is qualified to AEC-Q101 automotive standards. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

VLZ12-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 945VLZ12-GS18 Datasheet

Current PartRFQ

TLZ12-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 968TLZ12-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ12-GS18 is determined by the following critical electrical and mechanical parameters:

• Zener Voltage: 12 V nominal
• Power Dissipation: 500 mW maximum
• Impedance: 12 Ohms maximum
• Forward Voltage: 1.5 V maximum at 200 mA
• Operating Temperature Range: -65°C to 175°C
• Surface Mount Configuration: SOD-80 package family
• Compliance: RoHS3, REACH Unaffected, AEC-Q101 automotive qualification

The substitute part TLZ12-GS18 meets all these electrical specifications identically. The primary difference is the packaging variant within the SOD-80 family (MiniMELF versus QuadroMELF) and the product status transition from obsolete to active production.

Parameter Comparison

Engineering Selection Recommendations

The TLZ12-GS18 is the direct functional equivalent for the obsolete VLZ12-GS18. Both components share identical electrical specifications across all critical parameters: 12 V zener voltage, 500 mW power rating, 12 Ohms maximum impedance, and -65°C to 175°C operating temperature range.

The TLZ12-GS18 maintains full compliance with RoHS3 and REACH requirements and retains AEC-Q101 automotive qualification. The packaging variant (MiniMELF versus QuadroMELF within the SOD-80 family) represents a physical footprint difference that must be verified against PCB layout constraints. Both variants are surface mount configurations with identical electrical performance.

The transition from obsolete to active product status for the TLZ12-GS18 provides supply chain continuity and access to current manufacturing processes. No performance degradation or functional compromise occurs with this substitution.

Frequently Asked Questions (FAQ)

Q: Can TLZ12-GS18 replace VLZ12-GS18 in existing designs?

A: Yes. The TLZ12-GS18 provides identical electrical performance across all specified parameters. PCB layout verification is required to confirm compatibility with the SOD-80 MiniMELF footprint versus the original QuadroMELF variant.

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

A: Both are SOD-80 package variants with identical electrical specifications. The difference is physical footprint size. MiniMELF is a smaller variant. Verify PCB pad layout compatibility before implementation.

Q: Does the TLZ12-GS18 meet automotive qualification requirements?

A: Yes. The TLZ12-GS18 maintains AEC-Q101 qualification, meeting automotive-grade standards equivalent to the original VLZ12-GS18.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity classification.

Q: Why is VLZ12-GS18 marked as obsolete?

A: The VLZ12-GS18 has been discontinued by the manufacturer. The TLZ12-GS18 represents the active production equivalent with identical electrical specifications.

Q: What packaging format is the TLZ12-GS18 supplied in?

A: The TLZ12-GS18 is supplied in Tape & Reel (TR) format for automated assembly processes.