TLZ56-GS18 Equivalent & Substitute Parts

Part Overview

The TLZ56-GS18 is an active Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 56 V nominal Zener voltage with 500 mW maximum power dissipation in a surface mount SOD-80 MiniMELF package. This component is designed for voltage regulation and protection applications requiring stable reference voltage at 56 V. Substitute parts are identified to address inventory availability, extended temperature range requirements, or specific tolerance specifications while maintaining electrical and mechanical compatibility.

Substiute Parts

TLZ56-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 792TLZ56-GS18 Datasheet

Current PartRFQ

BZV55-B56,115

Nexperia USA Inc.In Stock: 3481BZV55-B56,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLZ56-GS18 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Zener voltage nominal rating of 56 V
• Maximum power dissipation of 500 mW
• Surface mount package type (SOD-80, DO-213AC, MINI-MELF)

Mechanical Compatibility Requirements:

• Identical package footprint and form factor
• Surface mount mounting type

Compliance Requirements:

• ROHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)
• REACH Unaffected status

The substitute part BZV55-B56,115 meets all critical electrical and mechanical parameters. Variations in impedance, forward voltage characteristics, reverse leakage current, and tolerance specifications do not preclude substitution when the primary functional requirements (56 V Zener voltage, 500 mW power rating, SOD-80 package) are satisfied.

Parameter Comparison

Engineering Selection Recommendations

TLZ56-GS18 (Vishay General Semiconductor):

• Primary selection for applications requiring impedance specification of 100 Ohms maximum
• Suitable for operating environments up to 175°C
• Active product status with established supply chain

BZV55-B56,115 (Nexperia USA Inc.):

• Substitute selection for applications requiring extended operating temperature range to 200°C
• Provides ±2% Zener voltage tolerance specification
• Higher inventory availability (3444 Pcs vs. 682 Pcs)
• Acceptable for applications where impedance specification of 200 Ohms maximum is within design tolerance

Both parts maintain ROHS3 compliance, REACH Unaffected status, and identical surface mount package specifications. Selection between these parts depends on specific application requirements for impedance, temperature range, and tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can BZV55-B56,115 be used as a direct replacement for TLZ56-GS18?

A: Yes, for applications where the design accommodates the impedance difference (100 Ohms vs. 200 Ohms maximum). Both parts share identical 56 V Zener voltage rating, 500 mW power rating, and SOD-80 package specifications. Verify that circuit design tolerates the higher impedance value of the substitute part.

Q: What is the primary difference between these two Zener diodes?

A: The main differences are impedance specification (TLZ56-GS18: 100 Ohms max; BZV55-B56,115: 200 Ohms max), operating temperature range (TLZ56-GS18: -65 to 175°C; BZV55-B56,115: -65 to 200°C), and Zener voltage tolerance (BZV55-B56,115 specifies ±2%). Both maintain identical Zener voltage and power ratings.

Q: Are the packages physically identical?

A: Yes. Both parts use the DO-213AC MINI-MELF SOD-80 package. PCB footprints and reflow soldering profiles are compatible.

Q: Do both parts meet RoHS and REACH requirements?

A: Yes. Both TLZ56-GS18 and BZV55-B56,115 are ROHS3 compliant and REACH Unaffected.

Q: Which part should be selected for high-temperature applications?

A: BZV55-B56,115 supports operating temperatures to 200°C, compared to 175°C for TLZ56-GS18. Select BZV55-B56,115 for applications requiring extended temperature range.

Q: What does the impedance specification mean for circuit design?

A: Impedance (Zzt) represents the dynamic impedance of the Zener diode at the specified Zener voltage. Lower impedance provides better voltage regulation stability. TLZ56-GS18 (100 Ohms) offers superior regulation compared to BZV55-B56,115 (200 Ohms). Verify circuit design requirements before substitution.