GDZ30B-HG3-08 Equivalent & Substitute Parts

Part Overview

The GDZ30B-HG3-08 is a 30 V Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 mW power dissipation in a surface mount SOD-323 package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter tolerances.

Substiute Parts

GDZ30B-HG3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 1005GDZ30B-HG3-08 Datasheet

Current PartRFQ

CMDZ5256B TR PBFREE

Central Semiconductor CorpIn Stock: 1463CMDZ5256B TR PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GDZ30B-HG3-08 is permissible when the following criteria are met:

Primary Substitution Criteria:

• Zener voltage (Vz) remains at 30 V nominal
• Package and case type remain SOD-323 (SC-76)
• Mounting type remains surface mount
• RoHS3 compliance is maintained
• Operating temperature range encompasses or exceeds the original specification

Secondary Compatibility Parameters:

• Power rating may exceed the original 200 mW specification
• Tolerance may be wider than ±2%
• Impedance and reverse leakage characteristics may vary within acceptable limits for the application
• Regulatory compliance (REACH, ECCN) must remain equivalent

The CMDZ5256B TR PBFREE meets all primary substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

GDZ30B-HG3-08 Selection Criteria:

• Primary choice when ±2% voltage tolerance is required
• Preferred for applications requiring AEC-Q101 automotive qualification
• Suitable for designs with thermal constraints limited to 200 mW dissipation
• Recommended when lower impedance is not a design requirement

CMDZ5256B TR PBFREE Selection Criteria:

• Acceptable substitute when ±5% voltage tolerance is within design specifications
• Suitable for applications requiring extended low-temperature operation (-65°C minimum)
• Preferred when higher power dissipation capability (250 mW) provides design margin
• Lower impedance (49 Ohms vs. 200 Ohms) may improve transient response characteristics
• Both parts maintain identical regulatory compliance and moisture sensitivity ratings

Both parts are active products with current inventory availability and equivalent compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can CMDZ5256B TR PBFREE replace GDZ30B-HG3-08 in all applications?

A: Substitution is valid when the application tolerates ±5% voltage tolerance instead of ±2%, and when the lower impedance characteristic (49 Ohms vs. 200 Ohms) does not negatively impact circuit performance. The higher power rating (250 mW vs. 200 mW) and extended low-temperature range (-65°C vs. -55°C) provide additional design margin.

Q: Are the package dimensions identical between these parts?

A: Both parts use the SOD-323 (SC-76) package with identical mechanical specifications, enabling direct PCB footprint compatibility without layout modifications.

Q: What is the impact of impedance difference on circuit performance?

A: The CMDZ5256B TR PBFREE exhibits lower impedance (49 Ohms) compared to the GDZ30B-HG3-08 (200 Ohms). This characteristic affects transient response and noise filtering behavior. Circuit simulation or testing is necessary to determine if this difference affects the intended application.

Q: Do both parts meet automotive qualification requirements?

A: The GDZ30B-HG3-08 carries AEC-Q101 automotive qualification. The CMDZ5256B TR PBFREE does not list AEC-Q101 qualification in the provided specifications. Applications requiring automotive qualification should retain the GDZ30B-HG3-08.

Q: What is the moisture sensitivity level for both parts?

A: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts RoHS3 compliant?

A: Yes, both GDZ30B-HG3-08 and CMDZ5256B TR PBFREE are ROHS3 compliant and REACH unaffected, meeting current environmental regulatory requirements.

Q: Can these parts be used interchangeably in tape and reel packaging?

A: Both parts are supplied in Tape & Reel (TR) packaging format, enabling direct substitution in automated assembly processes without packaging format changes.