TLZ39C-GS18 Equivalent & Substitute Parts

Part Overview

The TLZ39C-GS18 is a Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 39 V nominal Zener voltage with 500 mW maximum power dissipation in a surface mount SOD-80 MiniMELF package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when the original part becomes unavailable, when supply chain constraints occur, or when design flexibility permits operation within alternative electrical specifications while maintaining functional circuit requirements.

Substiute Parts

TLZ39C-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1259TLZ39C-GS18 Datasheet

Current PartRFQ

BZV55-B36,115

NXP SemiconductorsIn Stock: 773538BZV55-B36,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLZ39C-GS18 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Zener voltage rating within acceptable circuit tolerance
• Maximum power dissipation capacity of 500 mW or greater
• Impedance characteristics suitable for circuit regulation requirements
• Reverse leakage current specifications compatible with circuit bias conditions
• Forward voltage characteristics within acceptable operating ranges
• Operating temperature range encompassing -65°C to 175°C minimum

Mechanical Compatibility Criteria:

• Surface mount package type (SOD-80 MiniMELF / DO-213AC)
• Identical or compatible footprint dimensions
• Moisture sensitivity level of 1 (Unlimited) or equivalent

Compliance Requirements:

• RoHS3 compliance or equivalent regulatory status
• REACH unaffected status

The BZV55-B36,115 is identified as a manufacturer-recommended substitute based on matching power rating, package type, and surface mount configuration, with Zener voltage deviation of 3 V from the primary specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The TLZ39C-GS18 remains the specified component when the 39 V Zener voltage is a critical design parameter and supply availability permits procurement. This part carries explicit RoHS3 compliance certification and operates within the -65°C to 175°C temperature range.

Substitute Part Selection: The BZV55-B36,115 from NXP Semiconductors is suitable for substitution when:

• Circuit design tolerates a 3 V reduction in Zener voltage (36 V versus 39 V nominal)
• The extended operating temperature range to 200°C provides design margin
• Supply chain constraints prevent procurement of the primary part
• Both parts maintain identical 500 mW power rating and SOD-80 MiniMELF package compatibility
• REACH unaffected status is maintained for both components

Compliance Considerations: Both parts are classified as Active product status. The TLZ39C-GS18 explicitly states RoHS3 compliance. The BZV55-B36,115 does not specify RoHS status in the provided data; verification of RoHS compliance status with the supplier is necessary for applications requiring regulatory certification.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B36,115 be used as a direct replacement for the TLZ39C-GS18?

A: The BZV55-B36,115 is mechanically compatible (identical SOD-80 MiniMELF package) and electrically compatible for applications where a 3 V reduction in Zener voltage (from 39 V to 36 V) is acceptable. Circuit design must verify that the lower voltage rating does not compromise regulation or protection functions.

Q: What is the significance of the 3 V voltage difference between these parts?

A: The TLZ39C-GS18 is rated at 39 V nominal Zener voltage, while the BZV55-B36,115 is rated at 36 V. This 3 V difference affects voltage regulation accuracy and overvoltage protection thresholds. Applications requiring precise 39 V regulation must use the primary part. Applications with voltage tolerance bands that encompass 36 V to 39 V can accommodate the substitute.

Q: Are the package dimensions identical between these two parts?

A: Both parts use the DO-213AC / MINI-MELF / SOD-80 package designation. This indicates identical footprint and mechanical compatibility for printed circuit board assembly.

Q: What is the difference in impedance between these parts?

A: The TLZ39C-GS18 specifies 85 Ohms maximum impedance, while the BZV55-B36,115 specifies 90 Ohms maximum impedance. This 5 Ohm difference has negligible impact on most circuit applications and does not prevent substitution.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both the TLZ39C-GS18 and BZV55-B36,115 are rated at Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or assembly.

Q: What is the temperature operating range difference?

A: The TLZ39C-GS18 operates from -65°C to 175°C. The BZV55-B36,115 extends the upper limit to 200°C, providing an additional 25°C of high-temperature margin. Both parts meet the -65°C lower temperature requirement.

Q: Is RoHS compliance identical for both parts?

A: The TLZ39C-GS18 is explicitly RoHS3 compliant. The BZV55-B36,115 does not specify RoHS status in the provided technical data. Applications requiring RoHS certification must verify compliance status with NXP Semiconductors before substitution.

Q: How do the reverse leakage current specifications compare?

A: The TLZ39C-GS18 specifies 40 nA at 34.2 V, while the BZV55-B36,115 specifies 50 nA at 700 mV. These measurements are taken at different reference voltages, making direct comparison difficult. Both values indicate low reverse leakage suitable for precision circuit applications.