VLZ16B-GS18 Zener Diode Equivalent & Substitute Parts Reference

Part Overview

The VLZ16B-GS18 is a surface-mount Zener diode from Vishay General Semiconductor - Diodes Division, nominally rated at 15.65 V, 500 mW, packaged in SOD-80 QuadroMELF. It is classified as an automotive grade, AEC-Q101 qualified device. This part is marked as obsolete, necessitating the identification of direct substitutes for ongoing production, repair, and inventory fulfillment.

Key Parameters

Manufacturer Part Number	Voltage - Zener (Nom) (Vz)	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status	Qualification
VLZ16B-GS18	15.65 V	500 mW	18 Ohms	40 µA @ 14.5 V	1.5 V @ 200 mA	-65°C ~ 175°C	Surface Mount	SOD-80 Variant	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	AEC-Q101

Substitute Part Grouping Explanation

Substitution is assessed based on equivalency in the following parameters: nominal Zener voltage (Vz), maximum power dissipation, impedance (Zzt), maximum reverse leakage current at the specified test voltage, forward voltage (Vf) at test current, surface mount package compatibility, operational temperature range, RoHS compliance, and AEC-Q101 or related automotive qualification. Only parts directly meeting these parameters are considered substitutes.

Parameter Comparison

Manufacturer Part Number	Voltage - Zener (Nom) (Vz)	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	RoHS Status	Moisture Sensitivity Level (MSL)	REACH Status
VLZ16B-GS18	15.65 V	500 mW	18 Ohms	40 µA @ 14.5 V	1.5 V @ 200 mA	-65°C ~ 175°C	Surface Mount	SOD-80 Variant	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
TLZ16B-GS18	16 V	500 mW	18 Ohms	40 nA @ 14.5 V	1.5 V @ 200 mA	-65°C ~ 175°C	Surface Mount	DO-213AC, MINI-MELF, SOD-80	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
1N4110UR-1	16 V	500 mW	100 Ohms	50 nA @ 12.2 V	1.1 V @ 200 mA	-65°C ~ 175°C	Surface Mount	DO-213AA	RoHS non-compliant	1 (Unlimited)	REACH Unaffected

Engineering Selection Recommendations

The VLZ16B-GS18 is obsolete. Substitute selection should consider compliance and qualification information. The TLZ16B-GS18 is active, meets ROHS3 requirements, is supplied in SOD-80 compatible surface mount packaging, and matches all principal electrical parameters. The 1N4110UR-1 is RoHS non-compliant and is supplied in a DO-213AA package. Only devices that align with RoHS and AEC-Q101 or similar qualification, where required, should be considered for applications with such needs. Inventory availability and product status are favorable for TLZ16B-GS18.

Frequently Asked Questions (FAQ)

Q: What are the primary factors when substituting VLZ16B-GS18 Zener diodes?
A: Primary factors include Zener voltage, power dissipation, maximum impedance, reverse leakage current, forward voltage, package compatibility, mounting type, operating temperature, RoHS status, and qualification.

Q: Is the case size or package type interchangeable between VLZ16B-GS18 and its substitutes?
A: TLZ16B-GS18 is supplied in a SOD-80 compatible MiniMELF package. 1N4110UR-1 is supplied in DO-213AA, which may require mechanical compatibility checks.

Q: How does RoHS compliance affect substitute selection?
A: For applications needing RoHS compliance, TLZ16B-GS18 is suitable. 1N4110UR-1 is not RoHS compliant.

Q: Are AEC-Q101-qualified substitutes available?
A: Only VLZ16B-GS18 explicitly lists AEC-Q101 qualification. Substitute parts should be verified for required qualifications based on application.

Q: Does a minor difference in Zener voltage (15.65 V vs. 16 V) impact substitutability?
A: Only Zener voltage values provided in the parameters are considered. Substitution decisions must be based strictly on these specified values for the intended circuit design.

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