Equivalent & Substitute Parts Reference: VLZ27-GS18

Part Overview

The VLZ27-GS18 by Vishay General Semiconductor - Diodes Division is a surface mount automotive grade Zener Diode with a nominal Zener voltage of 27 V and maximum power dissipation of 500 mW in a SOD-80 QuadroMELF package. The part is currently obsolete. For applications requiring new or ongoing production, it is necessary to identify direct substitute parts that match its electrical and mechanical characteristics.

Substiute Parts

VLZ27-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 879VLZ27-GS18 Datasheet

Current PartRFQ

TLZ27-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 824TLZ27-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic is based strictly on matching electrical and mechanical parameters provided, including Zener voltage (27 V), maximum power (500 mW), maximum impedance (45 Ohms), forward voltage (1.5 V @ 200 mA), operating temperature range (-65°C ~ 175°C), mounting type (surface mount), package/case (SOD-80), RoHS3 compliance, moisture sensitivity level (MSL 1), REACH status, ECCN, and HTSUS. Only parts with identical or matching values for these supplied characteristics are considered direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The original VLZ27-GS18 is obsolete. For ongoing design or replacement in assemblies, selection should be based on available substitutes that are active, meet identical electrical and mechanical specifications, and hold equivalent compliance certifications such as RoHS3 and REACH. Both VLZ27-GS18 and TLZ27-GS18 are automotive grade with AEC-Q101 qualification. TLZ27-GS18 is active, meets all compliance requirements, and carries matching ECCN and HTSUS codes.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters for substituting VLZ27-GS18 in a circuit?
A1: The key substitution criteria are Zener voltage (27 V), power rating (500 mW), maximum impedance (45 Ohms), forward voltage (1.5 V @ 200 mA), operating temperature range (-65°C ~ 175°C), mounting type (surface mount), and SOD-80 package compatibility.

Q2: Are VLZ27-GS18 and TLZ27-GS18 mechanically interchangeable?
A2: Both use SOD-80 package variants suitable for surface mount applications. The supplier device package for VLZ27-GS18 is SOD-80 QuadroMELF, and TLZ27-GS18 is SOD-80 MiniMELF, both conforming to industry-standard SOD-80 footprints.

Q3: Is product status important in selecting a substitute?
A3: Yes. VLZ27-GS18 is obsolete; using an active substitute such as TLZ27-GS18 is necessary for ongoing production and replacement needs.

Q4: Does compliance certification affect interchangeability?
A4: Both parts are ROHS3 compliant and REACH unaffected, with the same MSL rating. This ensures similar environmental, reliability, and handling standards.

Q5: Are there differences in performance or ratings between VLZ27-GS18 and TLZ27-GS18 relevant to substitution?
A5: Based strictly on the provided parameters, all key electrical and mechanical ratings are identical, qualifying TLZ27-GS18 as a direct substitute.