GDZ20B-E3-08 Equivalent & Substitute Parts

Part Overview

The GDZ20B-E3-08 is a Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 20 V nominal with 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as Active product status and is ROHS3 compliant. 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

GDZ20B-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 20489GDZ20B-E3-08 Datasheet

Current PartRFQ

GDZ20B-G3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 5905GDZ20B-G3-08 Datasheet

Parametric EquivalentRFQ

MM3Z20VT1G

onsemiIn Stock: 125140MM3Z20VT1G Datasheet

MFR RecommendedRFQ

MMSZ5250BS-7-F

Diodes IncorporatedIn Stock: 156305MMSZ5250BS-7-F Datasheet

MFR RecommendedRFQ

SZMM3Z20VT1G

onsemiIn Stock: 78207SZMM3Z20VT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GDZ20B-E3-08 is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Zener (Nom): 20 V (exact match required)
• Power - Max: 200 mW or greater
• Package / Case: SOD-323 or compatible surface mount package
• Mounting Type: Surface Mount
• Operating Temperature Range: Must encompass or exceed -55°C ~ 150°C
• RoHS Status: ROHS3 Compliant

Parametric Equivalents maintain identical electrical specifications and package form factor. Manufacturer Recommended Substitutes provide equivalent or enhanced performance with allowable variations in tolerance, impedance, or power rating while maintaining functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

GDZ20B-G3-08 (Vishay General Semiconductor - Diodes Division)

This part is a parametric equivalent to the GDZ20B-E3-08, maintaining identical electrical specifications, tolerance, impedance, and package configuration. Both components are Active status products with ROHS3 compliance and MSL 1 rating. Selection between these two Vishay variants is based on availability and supply chain requirements.

MM3Z20VT1G (onsemi)

This manufacturer-recommended substitute provides enhanced power dissipation capability at 300 mW compared to the 200 mW rating of the primary part. Operating temperature range extends to -65°C, providing broader thermal coverage. Impedance is reduced to 55 Ohms, and reverse leakage current is lower at 50 nA @ 14 V. Tolerance specification is ±6%. This part is suitable for applications requiring higher thermal margin or improved leakage characteristics. Active product status with ROHS3 compliance.

MMSZ5250BS-7-F (Diodes Incorporated)

This manufacturer-recommended substitute maintains the 200 mW power rating and 100 nA reverse leakage specification of the primary part. Package configuration differs as SOD-123 instead of SOD-323, requiring PCB layout modification. Impedance is significantly lower at 25 Ohms. Operating temperature range extends to -65°C. Tolerance is ±5%. This part is applicable when SOD-123 package footprint is acceptable and lower impedance is beneficial. Active product status with ROHS3 compliance.

SZMM3Z20VT1G (onsemi)

This manufacturer-recommended substitute is qualified to AEC-Q101 automotive standard and carries automotive-grade designation. Electrical specifications match MM3Z20VT1G with 300 mW power rating, 55 Ohms impedance, and 50 nA reverse leakage. Operating temperature range is -65°C ~ 150°C. Tolerance is ±5%. Packaging is SOD-323 with Cut Tape and Digi-Reel options. Selection of this part is required for automotive applications or when AEC-Q101 qualification is mandated. Active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can GDZ20B-G3-08 be used as a direct replacement for GDZ20B-E3-08?

A: Yes. GDZ20B-G3-08 is a parametric equivalent with identical voltage rating (20 V), power rating (200 mW), tolerance (±4%), impedance (85 Ohms), and SOD-323 package. Both are Vishay products with Active status and ROHS3 compliance. No design changes are required.

Q: What are the differences between MM3Z20VT1G and the primary GDZ20B-E3-08?

A: MM3Z20VT1G provides 300 mW power dissipation versus 200 mW, lower impedance (55 Ohms vs. 85 Ohms), and extended temperature range to -65°C. Tolerance is ±6% compared to ±4%. Both maintain 20 V nominal voltage and SOD-323 package. These differences allow MM3Z20VT1G to operate with greater thermal margin.

Q: Why would MMSZ5250BS-7-F be selected if it uses a different package?

A: MMSZ5250BS-7-F uses SOD-123 package instead of SOD-323. Selection of this part requires PCB layout redesign to accommodate the different footprint. The advantage is significantly lower impedance at 25 Ohms, which may be beneficial in specific circuit applications. Electrical performance at 20 V and 200 mW remains equivalent.

Q: When should SZMM3Z20VT1G be specified?

A: SZMM3Z20VT1G is specified when automotive-grade components are required or when AEC-Q101 qualification is mandated by design standards. This part maintains SOD-323 package compatibility with the primary part while providing automotive qualification and enhanced specifications (300 mW, 55 Ohms impedance, -65°C lower temperature limit).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts—GDZ20B-G3-08, MM3Z20VT1G, MMSZ5250BS-7-F, and SZMM3Z20VT1G—are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All are suitable for applications with ROHS compliance requirements.

Q: What is the primary criterion for substitution compatibility?

A: The primary criterion is 20 V nominal Zener voltage. All substitute parts maintain this specification. Secondary criteria include power rating (200 mW minimum), surface mount configuration, and ROHS3 compliance. Package form factor (SOD-323 or SOD-123) determines PCB compatibility without design modification.