VLZ3V3-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ3V3-GS18 is a Zener Diode rated at 3.3 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 it is no longer in active production. Finding equivalent substitute parts is necessary to support ongoing design requirements, maintenance operations, and new production builds where this specification is required.

Substiute Parts

VLZ3V3-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1186VLZ3V3-GS18 Datasheet

Current PartRFQ

TLZ3V3-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 947TLZ3V3-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ3V3-GS18 is determined by the following critical parameters:

• Zener Voltage (Vz): 3.3 V nominal
• Power Dissipation: 500 mW maximum
• Impedance (Zzt): 70 Ohms maximum
• Forward Voltage (Vf): 1.5 V maximum at 200 mA
• Operating Temperature Range: -65°C to 175°C
• Mounting Type: Surface Mount
• Package Family: SOD-80 variants
• Compliance: ROHS3, AEC-Q101 Automotive Grade

The substitute part TLZ3V3-GS18 meets all electrical specifications and compliance requirements. The primary difference is the package variant designation (QuadroMELF versus MiniMELF) and product status (Obsolete versus Active). Both parts utilize the SOD-80 package family and are manufactured by the same supplier.

Parameter Comparison

Engineering Selection Recommendations

The TLZ3V3-GS18 is a direct electrical equivalent to the VLZ3V3-GS18, with identical electrical performance across all specified parameters. The substitute part is currently in Active production status, ensuring long-term availability and supply chain continuity.

Both parts are ROHS3 compliant and manufactured by Vishay General Semiconductor - Diodes Division. The VLZ3V3-GS18 carries AEC-Q101 Automotive Grade qualification; the TLZ3V3-GS18 specification does not explicitly list this qualification in the provided data.

The primary distinction between the two parts is the package variant designation: QuadroMELF (VLZ3V3-GS18) versus MiniMELF (TLZ3V3-GS18). Both are SOD-80 package family components. Physical dimensions and PCB footprint compatibility must be verified against the specific package drawings for the intended application.

Selection of TLZ3V3-GS18 is supported by its Active product status and equivalent electrical specifications. Applications requiring explicit AEC-Q101 certification should confirm qualification status with the manufacturer.

Frequently Asked Questions (FAQ)

Q: Are the VLZ3V3-GS18 and TLZ3V3-GS18 electrically interchangeable?

A: Yes. Both parts have identical Zener voltage (3.3 V), power rating (500 mW), impedance (70 Ohms maximum), and forward voltage characteristics (1.5 V @ 200 mA). Operating temperature ranges are identical (-65°C to 175°C).

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

A: Both are SOD-80 package family designations. QuadroMELF and MiniMELF refer to different physical package configurations within the SOD-80 standard. PCB footprint compatibility must be confirmed using the manufacturer's package drawings before substitution.

Q: Why is the VLZ3V3-GS18 marked as Obsolete?

A: Obsolete status indicates the part is no longer manufactured. The TLZ3V3-GS18 is the Active equivalent, ensuring continued availability for new designs and production requirements.

Q: Does the TLZ3V3-GS18 meet automotive qualification requirements?

A: The TLZ3V3-GS18 specification provided does not explicitly list AEC-Q101 qualification. The VLZ3V3-GS18 carries AEC-Q101 Automotive Grade certification. Confirmation of automotive qualification for the substitute part should be obtained from the manufacturer if required for the application.

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

A: The VLZ3V3-GS18 is supplied in standard packaging. The TLZ3V3-GS18 is supplied in Tape & Reel (TR) format. Both are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Can I use TLZ3V3-GS18 as a direct replacement on existing PCBs designed for VLZ3V3-GS18?

A: PCB compatibility depends on the specific footprint used in the original design. Both parts use SOD-80 package family, but QuadroMELF and MiniMELF variants may have different physical dimensions. The PCB layout must accommodate the substitute part's package variant. Consult the manufacturer's package drawings for dimensional verification.