VLZ16C-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ16C-GS18 is a Zener diode rated at 16.1 V nominal with 500 mW power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the SOD-80 QuadroMELF package and meets AEC-Q101 automotive qualification standards. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

VLZ16C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 806VLZ16C-GS18 Datasheet

Current PartRFQ

TLZ16C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1026TLZ16C-GS18 Datasheet

DirectRFQ

1N4110UR-1

Microchip TechnologyIn Stock: 12621N4110UR-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VLZ16C-GS18 is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage nominal rating within the 16 V to 16.1 V range
• Power dissipation rating of 500 mW minimum
• Surface mount configuration
• Operating temperature range of -65°C to 175°C minimum
• RoHS3 compliance status

Secondary Compatibility Factors:

• Impedance characteristics (maximum 18 Ohms preferred for circuit performance)
• Reverse leakage current specifications
• Forward voltage characteristics
• Package form factor compatibility with PCB layout constraints

The substitute parts identified below meet the primary substitution criteria. Package variations (SOD-80 MiniMELF versus DO-213AA) represent physical form factor differences that require PCB footprint verification during implementation.

Parameter Comparison

Engineering Selection Recommendations

TLZ16C-GS18 (Vishay General Semiconductor - Diodes Division):

The TLZ16C-GS18 is the primary recommended substitute for the VLZ16C-GS18. Both components are manufactured by Vishay and share identical electrical specifications: 16 V nominal Zener voltage, 500 mW power rating, 18 Ohms maximum impedance, and 1.5 V forward voltage at 200 mA. The TLZ16C-GS18 is currently in active production status, ensuring long-term availability and supply chain stability. Both parts maintain ROHS3 compliance and operate across the identical temperature range of -65°C to 175°C. The primary difference is the package variant: TLZ16C-GS18 uses SOD-80 MiniMELF (DO-213AC) versus the original QuadroMELF form factor. This substitution requires PCB footprint verification to confirm mechanical compatibility. The TLZ16C-GS18 demonstrates superior reverse leakage characteristics (40 nA versus 40 µA), indicating improved performance in low-current applications.

1N4110UR-1 (Microchip Technology):

The 1N4110UR-1 is a secondary substitute option manufactured by Microchip Technology. This component meets the core electrical requirements: 16 V nominal Zener voltage and 500 mW power dissipation. However, several engineering considerations apply to this selection. The impedance specification is 100 Ohms maximum, significantly higher than the 18 Ohms of the original part, which may affect circuit regulation characteristics in precision voltage reference applications. The forward voltage is lower at 1.1 V versus 1.5 V, and reverse leakage is specified at 50 nA @ 12.2 V. The 1N4110UR-1 uses the DO-213AA package form factor, requiring PCB layout modification. Critically, this part carries RoHS non-compliant status, which may conflict with design requirements or regulatory obligations in automotive or consumer applications. The part is currently in active production status.

Selection Criteria Summary:

For applications requiring automotive-grade components with AEC-Q101 qualification and ROHS3 compliance, the TLZ16C-GS18 is the appropriate selection. For applications where RoHS compliance is not mandated and impedance tolerance is acceptable, the 1N4110UR-1 provides an alternative with improved forward voltage characteristics. All three components support the full -65°C to 175°C operating temperature range and 500 mW power dissipation requirement.

Frequently Asked Questions (FAQ)

Q: Can the TLZ16C-GS18 be used as a direct replacement for the VLZ16C-GS18 without circuit modification?

A: The TLZ16C-GS18 is electrically equivalent to the VLZ16C-GS18 in all critical parameters: Zener voltage (16 V nominal), power rating (500 mW), impedance (18 Ohms), and operating temperature range (-65°C to 175°C). However, the package form factor differs (SOD-80 MiniMELF versus SOD-80 QuadroMELF). PCB footprint verification is required to confirm mechanical compatibility. If the PCB layout accommodates the MiniMELF package, no circuit modification is necessary.

Q: What is the significance of the impedance difference between TLZ16C-GS18 (18 Ohms) and 1N4110UR-1 (100 Ohms)?

A: Impedance (Zzt) affects the dynamic regulation of the Zener diode. Lower impedance values provide better voltage regulation under varying load conditions. The 18 Ohms specification of both the VLZ16C-GS18 and TLZ16C-GS18 indicates superior regulation performance compared to the 1N4110UR-1 at 100 Ohms. In precision voltage reference circuits, this difference may be significant. In general-purpose voltage clamping applications, the higher impedance of the 1N4110UR-1 may be acceptable.

Q: Why does the VLZ16C-GS18 show reverse leakage of 40 µA while the TLZ16C-GS18 shows 40 nA?

A: The reverse leakage current specification difference (40 µA versus 40 nA) represents a 1000-fold improvement in the TLZ16C-GS18. This indicates superior semiconductor material quality or manufacturing process refinement in the newer TLZ series. Lower reverse leakage reduces standby power consumption and improves circuit performance in low-current applications. This is a performance advantage of the substitute part.

Q: Is the 1N4110UR-1 suitable for automotive applications?

A: The 1N4110UR-1 does not carry automotive-grade designation or AEC-Q101 qualification. Additionally, it is RoHS non-compliant. For automotive applications requiring AEC-Q101 qualification and ROHS3 compliance, the TLZ16C-GS18 is the appropriate selection. The 1N4110UR-1 is suitable for industrial or consumer applications where automotive qualification is not required.

Q: What PCB layout considerations apply when substituting the TLZ16C-GS18 for the VLZ16C-GS18?

A: The primary consideration is package form factor compatibility. The VLZ16C-GS18 uses SOD-80 QuadroMELF packaging, while the TLZ16C-GS18 uses SOD-80 MiniMELF (DO-213AC) packaging. Both are surface mount packages with different physical dimensions and lead configurations. Verify that the PCB footprint accommodates the MiniMELF form factor. If the existing PCB layout is designed exclusively for QuadroMELF, a footprint redesign is required. Electrical connections and circuit topology remain unchanged.

Q: Can both substitute parts be used interchangeably in the same circuit?

A: No. While both parts meet the core Zener voltage and power requirements, they differ in impedance (18 Ohms versus 100 Ohms), reverse leakage characteristics, forward voltage, and compliance status. The TLZ16C-GS18 is the preferred direct substitute due to matched impedance and superior leakage performance. The 1N4110UR-1 should be selected only when its specific electrical characteristics (lower forward voltage, higher impedance tolerance) are acceptable for the application and RoHS non-compliance is not a constraint.

Q: What is the inventory status of these substitute parts?

A: The TLZ16C-GS18 has 953 pieces in stock (active production status). The 1N4110UR-1 has 1153 pieces in stock (active production status). Both parts demonstrate adequate supply availability for procurement planning.