VLZ39F-GS08 Equivalent & Substitute Parts

Part Overview

The VLZ39F-GS08 is a Zener diode rated at 39.13 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, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part carries Automotive grade qualification (AEC-Q101) and is ROHS3 compliant.

Substiute Parts

VLZ39F-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1161VLZ39F-GS08 Datasheet

Current PartRFQ

TLZ39F-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 5310TLZ39F-GS08 Datasheet

DirectRFQ

BZV55-B39,115

Nexperia USA Inc.In Stock: 3230BZV55-B39,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VLZ39F-GS08 are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Zener voltage nominal rating: 39 V to 39.13 V
• Power dissipation rating: 500 mW
• Package type: SOD-80 surface mount variants (QuadroMELF, MiniMELF, LLDS)
• Operating temperature range: Minimum -65°C to 175°C
• Mounting configuration: Surface mount

Secondary Compatibility Factors:

• Impedance (Zzt): Maximum 85 to 130 Ohms
• Reverse leakage current characteristics
• Forward voltage characteristics
• RoHS3 compliance status
• Moisture sensitivity level (MSL 1)

The identified substitutes maintain electrical performance within the specified operating envelope while accommodating packaging variations and manufacturing source changes.

Parameter Comparison

Engineering Selection Recommendations

TLZ39F-GS08 (Vishay General Semiconductor - Diodes Division)

The TLZ39F-GS08 is the primary substitute for the obsolete VLZ39F-GS08. Both components are manufactured by Vishay and share identical electrical specifications including 39 V nominal zener voltage, 500 mW power rating, and 85 Ohms maximum impedance. The TLZ39F-GS08 is currently in Active product status with 5300 units in stock. The primary difference is the package variant: TLZ39F-GS08 uses SOD-80 MiniMELF configuration versus the QuadroMELF variant of the original part. Both maintain equivalent surface mount compatibility and thermal performance across the -65°C to 175°C operating range. The TLZ39F-GS08 demonstrates improved reverse leakage characteristics (40 nA versus 40 µA), providing superior performance in low-current applications.

BZV55-B39,115 (Nexperia USA Inc.)

The BZV55-B39,115 serves as an alternative substitute manufactured by Nexperia. This component meets the core electrical requirements with 39 V nominal zener voltage and 500 mW power dissipation. The BZV55-B39,115 extends the operating temperature range to 200°C and includes ±2% voltage tolerance specification. The impedance rating of 130 Ohms is higher than the original specification but remains within acceptable substitution parameters. This part is currently Active with 3217 units in stock. The LLDS/MiniMELF package configuration provides surface mount compatibility. Selection of this substitute is appropriate when extended temperature performance or tighter voltage tolerance is required.

Frequently Asked Questions (FAQ)

Q: Can the TLZ39F-GS08 directly replace the VLZ39F-GS08 in existing designs?

A: The TLZ39F-GS08 provides direct electrical substitution with identical zener voltage (39 V nominal), power rating (500 mW), and impedance (85 Ohms maximum). Both components use SOD-80 surface mount packages. The primary consideration is PCB layout compatibility between QuadroMELF and MiniMELF package variants, which may require minor footprint adjustments depending on the original design specifications.

Q: What are the key differences between the TLZ39F-GS08 and BZV55-B39,115?

A: Both substitutes maintain 39 V nominal zener voltage and 500 mW power dissipation. The TLZ39F-GS08 matches the original impedance specification (85 Ohms), while the BZV55-B39,115 has higher impedance (130 Ohms). The BZV55-B39,115 offers extended temperature range (-65°C to 200°C versus -65°C to 175°C) and includes ±2% voltage tolerance. Reverse leakage characteristics differ between the two substitutes, with the BZV55-B39,115 specified at 50 nA @ 27.3 V.

Q: Are there packaging considerations when substituting these parts?

A: The VLZ39F-GS08 uses SOD-80 QuadroMELF packaging, while both substitutes use SOD-80 MiniMELF or LLDS variants. All three components are surface mount devices with compatible lead-free solder processes. PCB footprint verification is required to confirm mechanical fit, as MiniMELF and LLDS packages have different dimensional specifications than QuadroMELF.

Q: Do all substitute parts meet automotive qualification requirements?

A: The VLZ39F-GS08 carries AEC-Q101 automotive qualification. The TLZ39F-GS08 is manufactured by the same automotive-qualified division (Vishay General Semiconductor - Diodes Division). The BZV55-B39,115 is manufactured by Nexperia and should be verified for automotive qualification status in specific applications requiring AEC-Q101 compliance.

Q: What is the significance of the reverse leakage current differences?

A: The VLZ39F-GS08 specifies 40 µA reverse leakage at 36.2 V, while the TLZ39F-GS08 specifies 40 nA at the same voltage. The BZV55-B39,115 specifies 50 nA at 27.3 V. Lower reverse leakage current indicates superior performance in precision analog circuits and low-power applications. The TLZ39F-GS08 and BZV55-B39,115 provide improved leakage characteristics compared to the original part.

Q: Are all parts RoHS3 compliant?

A: Yes, all three components (VLZ39F-GS08, TLZ39F-GS08, and BZV55-B39,115) are ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level), indicating no special moisture handling requirements during storage or assembly.