VLZ10C-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ10C-GS18 is a Zener Diode rated at 9.95 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, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part carries AEC-Q101 automotive qualification and is ROHS3 compliant.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	9.95 V
Power - Max	500 mW
Impedance (Max) (Zzt)	8 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 9.22 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 Variant
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VLZ10C-GS18 is determined by the following critical parameters: nominal Zener voltage, maximum power dissipation, operating temperature range, and surface mount compatibility. The main part operates at 9.95 V nominal; substitute parts must operate at 10 V nominal, which represents a 0.05 V deviation within acceptable circuit tolerance for voltage regulation applications. All substitute parts maintain the 500 mW power rating and -65°C to 175°C operating temperature range.

Substitutes are grouped into two categories based on package configuration:

Category 1: Same Package Family (SOD-80 MiniMELF) The TLZ10C-GS18 maintains the SOD-80 package designation and represents a direct Vishay product line upgrade from the obsolete VLZ series to the active TLZ series.

Category 2: Alternative Package (DO-213AA) The 1N4104DUR-1, 1N4104UR-1, 1N5530BUR-1, and 1N758AUR-1 parts utilize the DO-213AA package, which is mechanically and electrically compatible for surface mount applications but differs in physical form factor. These parts are manufactured by Microchip Technology and represent industry-standard alternatives.

Parameter Comparison

Parameter	VLZ10C-GS18	TLZ10C-GS18	1N4104DUR-1	1N4104UR-1	1N5530BUR-1	1N758AUR-1
Manufacturer	Vishay	Vishay	Microchip	Microchip	Microchip	Microchip
Voltage - Zener (Nom) (Vz)	9.95 V	10 V	10 V	10 V	10 V	10 V
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max) (Zzt)	8 Ohms	8 Ohms	200 Ohms	200 Ohms	60 Ohms	7 Ohms
Current - Reverse Leakage @ Vr	40 µA @ 9.22 V	40 nA @ 9.22 V	500 nA @ 7.6 V	500 nA @ 7.6 V	50 nA @ 9.1 V	1 µA @ 8 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-80 QuadroMELF	SOD-80 MiniMELF	DO-213AA	DO-213AA	DO-213AA	DO-213AA
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

Primary Recommendation: TLZ10C-GS18

The TLZ10C-GS18 is the preferred substitute for the obsolete VLZ10C-GS18. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical specifications including 500 mW power rating, 8 Ohm impedance, and -65°C to 175°C operating temperature range. The TLZ10C-GS18 carries Active product status and ROHS3 compliance. The nominal Zener voltage increases from 9.95 V to 10 V, representing a 0.05 V deviation suitable for voltage regulation circuits. The package designation remains within the SOD-80 family (MiniMELF variant), ensuring mechanical compatibility with existing PCB layouts designed for the original part.

Secondary Recommendations: Microchip Technology Alternatives

The 1N4104DUR-1, 1N4104UR-1, 1N5530BUR-1, and 1N758AUR-1 parts provide functional equivalence with the following considerations:

The 1N4104DUR-1 offers ROHS3 compliance with ±1% voltage tolerance, providing tighter voltage regulation than the original part. The 1N4104UR-1 and 1N5530BUR-1 provide ±5% voltage tolerance with RoHS non-compliance. The 1N758AUR-1 delivers impedance characteristics (7 Ohms) closest to the original part specification.

All Microchip alternatives utilize the DO-213AA package, which requires PCB layout modification compared to the SOD-80 package family. These parts are suitable for applications where package footprint change is acceptable and where RoHS compliance requirements align with design specifications.

Frequently Asked Questions (FAQ)

Q: Can the TLZ10C-GS18 directly replace the VLZ10C-GS18 without circuit modification?

A: The TLZ10C-GS18 maintains electrical equivalence with a nominal Zener voltage of 10 V compared to the original 9.95 V. This 0.05 V difference is within acceptable tolerance for voltage regulation applications. Both parts share identical power ratings (500 mW), impedance (8 Ohms), and operating temperature ranges (-65°C to 175°C). The SOD-80 package family compatibility ensures mechanical fit on existing PCBs. No circuit modification is required.

Q: What is the primary difference between the Vishay TLZ10C-GS18 and the Microchip alternatives?

A: The TLZ10C-GS18 maintains the SOD-80 package family, requiring no PCB layout changes. Microchip alternatives (1N4104DUR-1, 1N4104UR-1, 1N5530BUR-1, 1N758AUR-1) utilize the DO-213AA package, which has different physical dimensions and requires PCB footprint modification. Electrical performance differs in impedance characteristics and reverse leakage specifications.

Q: Which substitute part offers the best impedance match to the original VLZ10C-GS18?

A: The 1N758AUR-1 provides impedance of 7 Ohms, which closely matches the original part's 8 Ohm specification. The TLZ10C-GS18 maintains identical 8 Ohm impedance. The 1N5530BUR-1 offers 60 Ohms, while the 1N4104DUR-1 and 1N4104UR-1 specify 200 Ohms impedance.

Q: Are all substitute parts suitable for automotive applications?

A: The original VLZ10C-GS18 carries AEC-Q101 automotive qualification. The TLZ10C-GS18 is manufactured by the same automotive-qualified division. Microchip alternatives do not specify AEC-Q101 qualification in the provided data. For automotive applications requiring AEC-Q101 certification, the TLZ10C-GS18 is the appropriate selection.

Q: What is the significance of the voltage tolerance specifications?

A: The original VLZ10C-GS18 does not specify voltage tolerance. The TLZ10C-GS18 similarly does not specify tolerance. The 1N4104DUR-1 provides ±1% tolerance, offering tighter voltage regulation. The 1N4104UR-1, 1N5530BUR-1, and 1N758AUR-1 specify ±5% tolerance. Tighter tolerance improves voltage regulation stability in precision applications.

Q: Can Microchip parts be used in designs originally specified for SOD-80 packages?

A: Microchip alternatives utilize the DO-213AA package, which differs physically from the SOD-80 package family. PCB layout modification is required, including changes to pad dimensions, spacing, and trace routing. Electrical functionality remains equivalent, but mechanical integration requires design revision.

Q: What is the impact of RoHS compliance status on part selection?

A: The TLZ10C-GS18 maintains ROHS3 compliance matching the original part. The 1N4104DUR-1 is ROHS3 compliant. The 1N4104UR-1, 1N5530BUR-1, and 1N758AUR-1 are RoHS non-compliant. For applications subject to RoHS regulations, the TLZ10C-GS18 or 1N4104DUR-1 are appropriate selections.

Q: How do reverse leakage specifications compare across substitute parts?

A: The original VLZ10C-GS18 specifies 40 µA reverse leakage at 9.22 V. The TLZ10C-GS18 reduces this to 40 nA at the same voltage, representing a 1000-fold improvement. Microchip alternatives specify 500 nA (1N4104DUR-1, 1N4104UR-1), 50 nA (1N5530BUR-1), or 1 µA (1N758AUR-1) at different reference voltages. Lower reverse leakage improves circuit performance in precision applications.

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