VLZ8V2C-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ8V2C-GS18 is a Zener diode rated at 8.24 V nominal with 500 mW power dissipation in a SOD-80 QuadroMELF surface mount package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as Obsolete. Due to its obsolete product status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	8.24 V
Power - Max	500 mW
Impedance (Max)	8 Ohms
Current - Reverse Leakage @ Vr	7.5 µA @ 7.63 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	SOD-80 QuadroMELF
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VLZ8V2C-GS18 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Zener voltage within the 8.2 V to 8.24 V range
Power dissipation rating of 500 mW minimum
Operating temperature range of -65°C to 175°C minimum
Surface mount technology requirement

Mechanical Compatibility Criteria:

SOD-80 package family (includes QuadroMELF and MiniMELF variants)
Surface mount footprint compatibility

Compliance Criteria:

RoHS3 compliance preferred for new designs
AEC-Q101 automotive qualification preferred where available

The substitute parts listed below meet the electrical and mechanical requirements for direct substitution in applications requiring 8.2 V to 8.24 V Zener diodes with 500 mW power rating in surface mount packages.

Parameter Comparison

Parameter	VLZ8V2C-GS18	TLZ8V2C-GS18	1N756AUR-1
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Microchip Technology
Voltage - Zener (Nom)	8.24 V	8.2 V	8.2 V
Tolerance	Not specified	Not specified	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	8 Ohms	8 Ohms	5 Ohms
Current - Reverse Leakage @ Vr	7.5 µA @ 7.63 V	7.5 µA @ 7.63 V	1 µA @ 6 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-80 QuadroMELF	SOD-80 MiniMELF	DO-213AA
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

TLZ8V2C-GS18 (Vishay General Semiconductor - Diodes Division)

The TLZ8V2C-GS18 is the primary substitute for the obsolete VLZ8V2C-GS18. Both components are manufactured by Vishay and share identical electrical specifications: 8.2 V nominal Zener voltage, 500 mW power rating, 8 Ohms maximum impedance, and -65°C to 175°C operating temperature range. The TLZ8V2C-GS18 is currently in Active product status with 757 units in stock. The primary difference is the package variant: TLZ8V2C-GS18 uses SOD-80 MiniMELF (DO-213AC) while the original uses SOD-80 QuadroMELF. Both packages are SOD-80 family variants with compatible surface mount footprints. The TLZ8V2C-GS18 maintains ROHS3 compliance and is suitable for automotive applications.

1N756AUR-1 (Microchip Technology)

The 1N756AUR-1 is an alternative substitute manufactured by Microchip Technology. It meets the core electrical requirements with 8.2 V nominal Zener voltage and 500 mW power rating across the -65°C to 175°C operating temperature range. The 1N756AUR-1 offers improved electrical characteristics: lower impedance (5 Ohms versus 8 Ohms), lower reverse leakage current (1 µA @ 6 V versus 7.5 µA @ 7.63 V), and lower forward voltage (1.1 V @ 200 mA versus 1.5 V @ 200 mA). The package is DO-213AA, a SOD-80 family variant. However, the 1N756AUR-1 is RoHS non-compliant and carries ±5% voltage tolerance specification. This part is suitable for applications where RoHS compliance is not required and improved electrical performance is beneficial. Current inventory is 940 units.

For new designs requiring RoHS3 compliance and automotive qualification, the TLZ8V2C-GS18 is the recommended substitute. For applications where RoHS compliance is not mandatory and improved electrical characteristics are advantageous, the 1N756AUR-1 provides an alternative option.

Frequently Asked Questions (FAQ)

Q: Can the TLZ8V2C-GS18 be used as a direct replacement for the VLZ8V2C-GS18?

A: Yes. Both components share identical electrical specifications: 8.2 V to 8.24 V nominal Zener voltage, 500 mW power dissipation, 8 Ohms maximum impedance, and -65°C to 175°C operating temperature range. The primary difference is the package variant within the SOD-80 family (MiniMELF versus QuadroMELF). Both packages are surface mount compatible and have compatible footprints for PCB integration.

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

A: Both are SOD-80 package family variants used for surface mount Zener diodes. QuadroMELF and MiniMELF refer to different physical dimensions and lead configurations within the SOD-80 standard. The electrical performance and functional characteristics remain identical. PCB layout compatibility depends on the specific footprint design; verify footprint dimensions against your PCB design before implementation.

Q: Is the 1N756AUR-1 suitable for automotive applications?

A: The 1N756AUR-1 is manufactured by Microchip Technology and does not carry AEC-Q101 automotive qualification. While it meets the electrical and temperature requirements for automotive temperature ranges (-65°C to 175°C), it lacks formal automotive qualification. For applications requiring AEC-Q101 certification, the TLZ8V2C-GS18 is the appropriate choice.

Q: Why is the 1N756AUR-1 listed as RoHS non-compliant?

A: The 1N756AUR-1 does not meet ROHS3 compliance requirements. If your application or supply chain mandates RoHS3 compliance, the TLZ8V2C-GS18 is the required substitute. The TLZ8V2C-GS18 is ROHS3 compliant and suitable for applications with RoHS requirements.

Q: What are the electrical performance differences between the substitute parts?

A: The 1N756AUR-1 offers superior electrical characteristics compared to both the VLZ8V2C-GS18 and TLZ8V2C-GS18: lower impedance (5 Ohms versus 8 Ohms), lower reverse leakage current (1 µA @ 6 V versus 7.5 µA @ 7.63 V), and lower forward voltage drop (1.1 V @ 200 mA versus 1.5 V @ 200 mA). These differences may provide benefits in applications sensitive to leakage current or forward voltage characteristics. However, the TLZ8V2C-GS18 maintains electrical compatibility with the original VLZ8V2C-GS18 specification.

Q: Are all three parts available in the same packaging format?

A: No. The VLZ8V2C-GS18 uses SOD-80 QuadroMELF, the TLZ8V2C-GS18 uses SOD-80 MiniMELF (DO-213AC), and the 1N756AUR-1 uses DO-213AA. All three are surface mount packages within the SOD-80 family, but physical dimensions differ. Verify PCB footprint compatibility before selecting a substitute part.

Q: What is the current inventory status for each part?

A: VLZ8V2C-GS18 (Obsolete): 682 units in stock. TLZ8V2C-GS18 (Active): 757 units in stock. 1N756AUR-1 (Active): 940 units in stock. The obsolete VLZ8V2C-GS18 has limited availability; the active substitutes offer better long-term supply assurance.

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