VLZ36C-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ36C-GS18 is a Zener Diode rated at 34.27 V nominal 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, identification of equivalent substitute parts is necessary to maintain design continuity and ensure procurement availability for new production runs and field replacements.

Substiute Parts

VLZ36C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 893VLZ36C-GS18 Datasheet

Current PartRFQ

TLZ36C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1026TLZ36C-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ36C-GS18 is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Zener voltage nominal rating within acceptable circuit tolerance
• 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 & Packaging Criteria:

• Surface Mount mounting type
• SOD-80 package family compatibility
• Automotive grade qualification (AEC-Q101)
• ROHS3 compliance
• Moisture Sensitivity Level 1

Identified Substitute: The TLZ36C-GS18 meets the substitution criteria based on matching power rating, impedance, forward voltage, operating temperature range, mounting type, package family, automotive qualification, and compliance standards. The nominal Zener voltage differs at 36 V versus 34.27 V, and the reverse leakage current specification differs at 40 nA versus 40 µA. These differences must be evaluated within the context of the specific circuit application.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The VLZ36C-GS18 is classified as Obsolete, while the TLZ36C-GS18 is Active. Active product status ensures continued manufacturing availability and supply chain reliability for future procurement requirements.

Compliance & Certification: Both parts are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited). The TLZ36C-GS18 maintains compatibility with the same regulatory framework. The VLZ36C-GS18 carries explicit Automotive grade and AEC-Q101 qualification; the TLZ36C-GS18 specification does not explicitly state these qualifications in the provided data.

Packaging Consideration: The VLZ36C-GS18 uses SOD-80 QuadroMELF packaging, while the TLZ36C-GS18 uses SOD-80 MiniMELF packaging. Both are SOD-80 family variants and Surface Mount types. Physical footprint differences between QuadroMELF and MiniMELF variants must be evaluated against PCB layout constraints.

Electrical Parameter Variance: The nominal Zener voltage differs by 1.73 V (34.27 V versus 36 V). The reverse leakage current specification differs by three orders of magnitude (40 µA versus 40 nA). These differences require circuit-level analysis to determine acceptability within the application's voltage regulation and leakage current tolerances.

Frequently Asked Questions (FAQ)

Q: Can the TLZ36C-GS18 be used as a direct replacement for the VLZ36C-GS18?

A: The TLZ36C-GS18 shares identical power rating, impedance, forward voltage, operating temperature range, mounting type, and compliance status. However, the nominal Zener voltage differs at 36 V versus 34.27 V, and reverse leakage current differs significantly at 40 nA versus 40 µA. Substitution is permissible only when the circuit design tolerates these electrical parameter variations.

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

A: Both are SOD-80 family Surface Mount packages. QuadroMELF and MiniMELF are variant designations within the SOD-80 standard. Physical dimensions and footprint characteristics differ between these variants. PCB layout compatibility must be confirmed before substitution.

Q: Why does the TLZ36C-GS18 have lower reverse leakage current?

A: The reverse leakage current specification is a measured electrical characteristic that differs between part numbers. The TLZ36C-GS18 specifies 40 nanoamperes while the VLZ36C-GS18 specifies 40 microamperes at the same reverse voltage condition. This represents superior leakage performance in the substitute part.

Q: Is the TLZ36C-GS18 suitable for automotive applications?

A: The TLZ36C-GS18 specification does not explicitly state Automotive grade or AEC-Q101 qualification in the provided data. The VLZ36C-GS18 carries explicit Automotive grade and AEC-Q101 qualification. For automotive applications requiring these certifications, confirmation of the TLZ36C-GS18 qualification status is necessary.

Q: What is the significance of the Zener voltage difference between these parts?

A: The VLZ36C-GS18 is rated at 34.27 V nominal while the TLZ36C-GS18 is rated at 36 V nominal. This 1.73 V difference affects the voltage regulation point in the circuit. Substitution is acceptable only when the circuit design permits operation at the higher voltage level or when the voltage tolerance specification accommodates this variance.

Q: Are both parts RoHS compliant?

A: Yes. Both the VLZ36C-GS18 and TLZ36C-GS18 are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.