VLZ4V7-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ4V7-GS18 is a Zener Diode rated at 4.7 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 status, identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. The part carries Automotive grade qualification (AEC-Q101) and is ROHS3 compliant.

Substiute Parts

VLZ4V7-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 932VLZ4V7-GS18 Datasheet

Current PartRFQ

TLZ4V7-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1078TLZ4V7-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ4V7-GS18 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Zener Voltage (Nom): 4.7 V
• Maximum Power Dissipation: 500 mW
• Maximum Impedance: 25 Ohms
• Forward Voltage (Max) @ If: 1.5 V @ 200 mA
• Operating Temperature Range: -65°C to 175°C

Mechanical Parameters (Must Match):

• Package Type: SOD-80 Surface Mount
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part TLZ4V7-GS18 meets all electrical and compliance requirements. The primary difference is the packaging variant (MiniMELF vs. QuadroMELF) and product status (Active vs. Obsolete), with both utilizing the SOD-80 package designation.

Parameter Comparison

Engineering Selection Recommendations

The TLZ4V7-GS18 is the direct substitute for the obsolete VLZ4V7-GS18. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications across all critical parameters: 4.7 V nominal Zener voltage, 500 mW maximum power dissipation, 25 Ohms maximum impedance, and identical forward voltage characteristics.

The substitute part is currently in Active product status with higher inventory availability (1061 Pcs vs. 921 Pcs), ensuring long-term supply chain reliability. Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, supporting automotive and industrial applications without additional handling requirements.

The packaging variant difference (MiniMELF vs. QuadroMELF) represents a physical form factor change within the SOD-80 package family. Both variants are surface mount components with compatible footprint considerations for PCB layout. The TLZ4V7-GS18 is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can the TLZ4V7-GS18 directly replace the VLZ4V7-GS18 in existing designs?

A: Yes. The TLZ4V7-GS18 meets all electrical specifications of the VLZ4V7-GS18, including Zener voltage, power rating, impedance, and operating temperature range. Both components are surface mount SOD-80 packages suitable for automated assembly.

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

A: Both are SOD-80 package variants used for surface mount Zener diodes. QuadroMELF and MiniMELF refer to different physical form factors within the SOD-80 designation. PCB footprint compatibility must be verified during design transition, as the two variants may have different lead spacing and dimensions.

Q: Why is the VLZ4V7-GS18 marked as Obsolete?

A: The VLZ4V7-GS18 has been discontinued by the manufacturer. The TLZ4V7-GS18 is the active replacement offering identical electrical performance with continued manufacturing support.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. The VLZ4V7-GS18 specifies AEC-Q101 Automotive qualification; this qualification status for the TLZ4V7-GS18 should be confirmed with the manufacturer for applications requiring explicit automotive certification documentation.

Q: What is the inventory status of these parts?

A: The VLZ4V7-GS18 has 921 Pcs in stock (Obsolete status). The TLZ4V7-GS18 has 1061 Pcs in stock (Active status), providing better long-term availability for new production orders.

Q: Are both parts suitable for automotive applications?

A: Yes. Both components carry Automotive grade classification and are suitable for automotive circuit protection and voltage regulation applications within the specified operating temperature range of -65°C to 175°C.