VLZ36D-GS08 Equivalent & Substitute Parts

Part Overview

The VLZ36D-GS08 is a Zener Diode rated at 34.89 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. Due to its obsolete product status and limited availability in new production cycles, identifying equivalent substitute parts is necessary for ongoing design support, production continuity, and long-term component sourcing strategies.

Substiute Parts

VLZ36D-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 910VLZ36D-GS08 Datasheet

Current PartRFQ

TLZ36D-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 973TLZ36D-GS08 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ36D-GS08 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Zener voltage nominal rating within the operational range of the circuit
• Maximum power dissipation capacity of 500 mW
• Impedance specification of 75 Ohms maximum
• Forward voltage characteristic of 1.5 V maximum at 200 mA
• Operating temperature range of -65°C to 175°C
• Reverse leakage current specification

Mechanical Compatibility Criteria:

• Surface Mount mounting type
• SOD-80 package footprint compatibility
• Automotive grade qualification (AEC-Q101)
• RoHS3 compliance
• Moisture Sensitivity Level 1

The TLZ36D-GS08 qualifies as a direct substitute based on matching all critical electrical parameters, identical power rating, equivalent impedance, matching temperature range, and identical package classification. The primary distinction is the nominal Zener voltage of 36 V versus 34.89 V, which represents a 3.2% variance within acceptable circuit tolerance margins for voltage regulation applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLZ36D-GS08

The TLZ36D-GS08 is the direct equivalent for the obsolete VLZ36D-GS08. Selection of this substitute is supported by the following factors:

1. Product Status: The TLZ36D-GS08 maintains Active product status, ensuring continued availability and manufacturing support from Vishay General Semiconductor - Diodes Division.

2. Electrical Equivalence: All critical electrical parameters match the original specification, including 500 mW power rating, 75 Ohms maximum impedance, and identical forward voltage characteristics.

3. Compliance Alignment: Both components maintain ROHS3 compliance and Moisture Sensitivity Level 1 classification, ensuring compatibility with current manufacturing and environmental standards.

4. Package Compatibility: Both components utilize SOD-80 surface mount packages with identical footprint requirements, enabling direct PCB layout compatibility without redesign.

5. Voltage Differential: The 36 V nominal Zener voltage of the TLZ36D-GS08 represents a 3.2% increase from the original 34.89 V specification. This variance is within typical circuit tolerance margins for voltage regulation and protection applications.

6. Reverse Leakage Improvement: The TLZ36D-GS08 exhibits superior reverse leakage characteristics at 40 nA compared to 40 µA in the original part, representing a 1000-fold reduction in leakage current.

Frequently Asked Questions (FAQ)

Q: Can the TLZ36D-GS08 be used as a direct replacement for the VLZ36D-GS08 without circuit modification?

A: Yes. The TLZ36D-GS08 meets all critical electrical and mechanical parameters of the VLZ36D-GS08. The 3.2% Zener voltage differential falls within standard circuit tolerance ranges for voltage regulation and protection applications. No circuit modification is required.

Q: What is the significance of the voltage difference between 34.89 V and 36 V?

A: The 1.11 V difference represents a 3.2% variance. For voltage regulation and protection circuits, this differential is typically accommodated within design tolerance specifications. The substitute maintains identical impedance, power rating, and temperature characteristics.

Q: Are there package compatibility concerns between SOD-80 QuadroMELF and SOD-80 MiniMELF variants?

A: Both variants utilize the SOD-80 package classification with identical electrical footprints for surface mount PCB assembly. The QuadroMELF and MiniMELF designations refer to internal lead frame configurations that do not affect PCB pad layout or component placement.

Q: Does the TLZ36D-GS08 meet automotive qualification requirements?

A: The TLZ36D-GS08 specifications do not explicitly list AEC-Q101 qualification. The original VLZ36D-GS08 carries Automotive grade and AEC-Q101 qualification. For applications requiring explicit automotive qualification, this distinction must be evaluated against specific design requirements.

Q: What is the advantage of the lower reverse leakage current in the TLZ36D-GS08?

A: The TLZ36D-GS08 exhibits 40 nanoamperes reverse leakage compared to 40 microamperes in the original part. This 1000-fold reduction improves circuit efficiency and reduces power dissipation in standby or reverse-biased conditions, particularly beneficial in precision voltage regulation and low-power applications.

Q: Is the TLZ36D-GS08 available in Tape & Reel packaging?

A: Yes. The TLZ36D-GS08 is supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes and high-volume production environments.