TLZ39B-GS18 Equivalent & Substitute Parts

Part Overview

The TLZ39B-GS18 is an active Zener diode manufactured by Vishay General Semiconductor - Diodes Division, designed for voltage regulation and protection applications. This 39 V, 500 mW surface mount component operates across an extended temperature range of -65°C to 175°C and is packaged in the SOD-80 MiniMELF form factor. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Finding equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain component availability across manufacturing cycles.

Substiute Parts

TLZ39B-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 922TLZ39B-GS18 Datasheet

Current PartRFQ

BZV55-C39,115

NXP SemiconductorsIn Stock: 838039BZV55-C39,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLZ39B-GS18 are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Electrical Parameters:

• Zener voltage nominal rating of 39 V
• Maximum power dissipation of 500 mW
• Surface mount technology compatibility
• Operating temperature range capability

Mechanical Parameters:

• Package format: DO-213AC, MINI-MELF, SOD-80
• Mounting type: Surface Mount

Compliance Parameters:

• ROHS3 compliance status
• REACH unaffected status
• Moisture sensitivity level MSL 1

The BZV55-C39,115 manufactured by NXP Semiconductors meets all core substitution criteria. Both parts share identical nominal Zener voltage (39 V), maximum power rating (500 mW), identical package designation (DO-213AC, MINI-MELF, SOD-80), and surface mount configuration. Both maintain ROHS3 and REACH compliance with MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

The BZV55-C39,115 from NXP Semiconductors is a direct functional equivalent to the TLZ39B-GS18. Both components share identical core electrical specifications (39 V nominal Zener voltage, 500 mW maximum power dissipation) and mechanical packaging (SOD-80 MiniMELF). Both parts maintain active product status and full compliance with ROHS3 and REACH requirements.

The NXP substitute offers an extended operating temperature range (-65°C to 200°C versus -65°C to 175°C), providing additional thermal margin in high-temperature applications. The impedance specification difference (130 Ohms versus 85 Ohms) reflects manufacturer characterization methodology and does not preclude functional substitution in standard voltage regulation circuits.

Both components carry MSL 1 (unlimited) moisture sensitivity rating, eliminating moisture-related handling constraints. Selection between these parts should be based on supply availability, lead time requirements, and established supplier relationships, as electrical performance in typical applications remains equivalent.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-C39,115 be used as a direct replacement for the TLZ39B-GS18 in existing designs?

A: Yes. Both components share identical nominal Zener voltage (39 V), maximum power dissipation (500 mW), and package format (SOD-80 MiniMELF). The electrical characteristics are compatible for standard voltage regulation and protection applications.

Q: What is the significance of the impedance difference between these parts?

A: The TLZ39B-GS18 specifies 85 Ohms maximum impedance while the BZV55-C39,115 specifies 130 Ohms maximum impedance. This difference reflects manufacturer test methodology and does not affect functional substitution in typical circuit applications. Impedance specifications are provided for detailed circuit analysis when required.

Q: Are there any temperature-related limitations when substituting the NXP part?

A: The NXP BZV55-C39,115 extends the upper operating temperature limit to 200°C compared to the Vishay part's 175°C. This provides additional thermal headroom and does not create any compatibility issues. Both parts maintain the same lower temperature limit of -65°C.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the TLZ39B-GS18 and BZV55-C39,115 are ROHS3 compliant and REACH unaffected. Both carry MSL 1 (unlimited) moisture sensitivity rating, eliminating special handling requirements.

Q: What is the tolerance specification for the Zener voltage?

A: The NXP BZV55-C39,115 specifies ±5% tolerance on the 39 V nominal Zener voltage. The Vishay TLZ39B-GS18 tolerance specification was not provided in the available data. For applications requiring specific tolerance bands, consult detailed datasheets from each manufacturer.

Q: Are the package dimensions identical between these parts?

A: Both components use the DO-213AC, MINI-MELF, SOD-80 package designation. This ensures mechanical and electrical compatibility in PCB layouts designed for either part.