TLZ43-GS08 Equivalent & Substitute Parts

Part Overview

The TLZ43-GS08 is an active zener diode manufactured by Vishay General Semiconductor - Diodes Division, designed for voltage regulation and protection applications. This surface mount component operates at a nominal zener voltage of 43 V with a maximum power dissipation of 500 mW in a compact SOD-80 MiniMELF package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

TLZ43-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 22790TLZ43-GS08 Datasheet

Current PartRFQ

BZV55-B43,115

Nexperia USA Inc.In Stock: 3997BZV55-B43,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLZ43-GS08 is determined by the following critical parameters:

Primary Substitution Criteria:

• Nominal zener voltage of 43 V
• Maximum power dissipation of 500 mW
• Surface mount package compatibility (SOD-80, DO-213AC, MINI-MELF)
• Operating temperature range support
• RoHS3 compliance and regulatory alignment

The BZV55-B43,115 manufactured by Nexperia USA Inc. meets these core requirements. Both parts share identical nominal zener voltage (43 V), maximum power rating (500 mW), and compatible package specifications. Both are ROHS3 compliant and operate within overlapping temperature ranges suitable for industrial applications.

Parameter Comparison

Engineering Selection Recommendations

Both the TLZ43-GS08 and BZV55-B43,115 are active products with full regulatory compliance. Selection between these parts is based on the following factors:

TLZ43-GS08 (Vishay General Semiconductor):

• Lower maximum impedance (90 Ohms) provides tighter voltage regulation characteristics
• Higher forward voltage specification (1.5 V @ 200 mA) indicates different forward conduction behavior
• Operating temperature range extends to 175°C
• Current inventory: 22,700 pieces

BZV55-B43,115 (Nexperia USA Inc.):

• Specified tolerance of ±2% on zener voltage provides defined accuracy
• Higher maximum impedance (150 Ohms) affects regulation slope
• Extended operating temperature range to 200°C
• Lower forward voltage specification (900 mV @ 10 mA)
• Current inventory: 3,928 pieces

Both parts satisfy ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity requirements. Selection should be based on circuit-specific impedance requirements, temperature operating envelope, and tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B43,115 directly replace the TLZ43-GS08 in all applications?

A: Both parts share the same nominal zener voltage (43 V), maximum power rating (500 mW), and compatible SOD-80 MiniMELF packages. However, the impedance difference (90 Ohms vs. 150 Ohms) and forward voltage specifications differ. Circuit designs sensitive to regulation slope or forward conduction characteristics require evaluation of these parameters against application requirements.

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

A: Impedance (Zzt) affects the zener diode's regulation characteristics. The TLZ43-GS08 specifies 90 Ohms maximum, while the BZV55-B43,115 specifies 150 Ohms maximum. Lower impedance typically provides better voltage regulation under load changes. Applications requiring tight regulation should account for this difference.

Q: Are both parts suitable for the same temperature range?

A: The TLZ43-GS08 operates from -65°C to 175°C, while the BZV55-B43,115 operates from -65°C to 200°C. The Nexperia part supports a wider upper temperature limit. Applications operating above 175°C require the BZV55-B43,115.

Q: What does the ±2% tolerance specification on the BZV55-B43,115 mean?

A: The BZV55-B43,115 carries a specified tolerance of ±2% on the nominal 43 V zener voltage, meaning the actual zener voltage will fall between 42.14 V and 43.86 V. The TLZ43-GS08 does not specify a tolerance value in the provided data.

Q: Are both parts RoHS3 compliant?

A: Yes, both the TLZ43-GS08 and BZV55-B43,115 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Can these parts be used interchangeably in PCB designs?

A: Both parts use identical package specifications (DO-213AC, MINI-MELF, SOD-80) and surface mount technology, allowing physical interchangeability on PCBs. Electrical interchangeability depends on circuit tolerance to impedance and forward voltage variations.