VLZ2V4B-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ2V4B-GS18 is a Zener diode rated at 2.53 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, indicating discontinuation from active production. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing manufacturing requirements for applications utilizing this zener diode specification.

Substiute Parts

VLZ2V4B-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1200VLZ2V4B-GS18 Datasheet

Current PartRFQ

TLZ2V4B-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 939TLZ2V4B-GS18 Datasheet

DirectRFQ

1N4617UR

Microchip TechnologyIn Stock: 8991N4617UR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ2V4B-GS18 is determined by alignment of the following critical parameters: nominal zener voltage, maximum power dissipation, impedance characteristics, reverse leakage current, forward voltage drop, operating temperature range, and regulatory compliance status. The substitute parts identified maintain compatibility within the allowed electrical and mechanical specifications for zener diode applications.

Critical Parameters for Substitution:

• Zener voltage nominal value within application tolerance
• Power dissipation rating of 500 mW
• Operating temperature range of -65°C to 175°C
• Surface mount configuration
• RoHS and automotive compliance where applicable

Parameter Comparison

Engineering Selection Recommendations

TLZ2V4B-GS18 (Vishay General Semiconductor): This substitute maintains the highest degree of compatibility with the VLZ2V4B-GS18. Both components are manufactured by Vishay General Semiconductor, share identical power dissipation (500 mW), impedance (100 Ohms), reverse leakage current (70 µA @ 1 V), and forward voltage characteristics (1.5 V @ 200 mA). The TLZ2V4B-GS18 operates across the same temperature range (-65°C to 175°C) and maintains ROHS3 compliance. The nominal zener voltage differs at 2.4 V versus 2.53 V. The TLZ2V4B-GS18 is currently in Active product status with confirmed inventory availability. Package configuration differs between SOD-80 QuadroMELF and SOD-80 MiniMELF variants.

1N4617UR (Microchip Technology): This substitute provides functional equivalence at the 2.4 V nominal zener voltage and 500 mW power rating with identical operating temperature range. However, significant parameter deviations exist: impedance is specified at 1400 Ohms (versus 100 Ohms), reverse leakage current is substantially lower at 1 µA @ 1 V (versus 70 µA @ 1 V), and forward voltage is reduced to 1.1 V @ 200 mA (versus 1.5 V @ 200 mA). The 1N4617UR is RoHS non-compliant and lacks automotive grade and AEC-Q101 qualification. Package configuration is DO-213AA (Glass). This component is currently in Active product status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the TLZ2V4B-GS18 directly replace the VLZ2V4B-GS18 in all applications?

A: The TLZ2V4B-GS18 is electrically compatible for most applications due to matching power dissipation, impedance, reverse leakage, and forward voltage specifications. The nominal zener voltage difference (2.4 V versus 2.53 V) must be evaluated against circuit tolerance requirements. Package configuration differs between QuadroMELF and MiniMELF variants; PCB layout and footprint compatibility must be verified.

Q: What are the key differences between the TLZ2V4B-GS18 and 1N4617UR?

A: Both components share 2.4 V nominal zener voltage and 500 mW power rating. The 1N4617UR exhibits significantly higher impedance (1400 Ohms versus 100 Ohms), lower reverse leakage current (1 µA versus 70 µA @ 1 V), and lower forward voltage (1.1 V versus 1.5 V @ 200 mA). The 1N4617UR is RoHS non-compliant and lacks automotive qualification. Package types differ: SOD-80 MiniMELF versus DO-213AA (Glass).

Q: Is the 1N4617UR suitable for automotive applications?

A: The 1N4617UR lacks automotive grade designation and AEC-Q101 qualification. The component is RoHS non-compliant. Use of this substitute in automotive applications requires design review and compliance verification against specific application requirements.

Q: How does the zener voltage difference between 2.53 V and 2.4 V affect circuit performance?

A: The 2.4 V nominal zener voltage of both substitute parts represents a 5.1% reduction from the original 2.53 V specification. Circuit impact depends on application tolerance and regulation requirements. Voltage regulation circuits, reference designs, and protection circuits must be evaluated for acceptable performance within this voltage differential.

Q: What packaging considerations apply when substituting these components?

A: The VLZ2V4B-GS18 uses SOD-80 QuadroMELF packaging. The TLZ2V4B-GS18 uses SOD-80 MiniMELF packaging. The 1N4617UR uses DO-213AA (Glass) packaging. Physical dimensions, PCB footprints, and reflow profile compatibility differ between these package types. PCB layout verification is required prior to implementation.

Q: Why is the VLZ2V4B-GS18 classified as Obsolete?

A: Obsolete status indicates the component has been discontinued from active production by the manufacturer. Substitute parts in Active product status provide ongoing supply chain availability and manufacturing support.

Q: Are all substitute parts RoHS compliant?

A: The TLZ2V4B-GS18 is ROHS3 compliant. The 1N4617UR is RoHS non-compliant. Regulatory compliance requirements must be verified against specific application and regional standards.