GDZ30B-G3-08 Equivalent & Substitute Parts

Part Overview

The GDZ30B-G3-08 is a Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 30 V nominal with 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit higher power ratings or improved electrical characteristics.

Substiute Parts

GDZ30B-G3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 914GDZ30B-G3-08 Datasheet

Current PartRFQ

MM3Z30VST1G

onsemiIn Stock: 6411MM3Z30VST1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GDZ30B-G3-08 is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage rating: 30 V nominal (exact match required)
• Package type: SOD-323 surface mount (mechanical compatibility)
• RoHS3 compliance status (regulatory requirement)
• Operating temperature range compatibility

Secondary Compatibility Factors:

• Power dissipation rating: Substitute parts with equal or higher maximum power ratings are functionally compatible
• Impedance characteristics: Lower impedance values indicate improved voltage regulation performance
• Reverse leakage current: Lower values indicate superior blocking characteristics

The MM3Z30VST1G manufactured by onsemi meets all primary substitution criteria with identical 30 V zener voltage and SOD-323 packaging. The substitute part provides enhanced electrical performance through higher power rating (300 mW versus 200 mW) and significantly lower impedance (2 Ohms versus 200 Ohms), making it suitable for applications requiring improved voltage regulation stability.

Parameter Comparison

Engineering Selection Recommendations

GDZ30B-G3-08 (Vishay General Semiconductor): Select this part when the original design specification calls for 200 mW maximum power dissipation and the higher impedance characteristic is acceptable for the application. This part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

MM3Z30VST1G (onsemi): Select this substitute part when higher power dissipation capability (300 mW) is required or when improved voltage regulation performance is needed due to significantly lower impedance (2 Ohms). This part is suitable for applications operating at lower temperature extremes (down to -65°C) and provides superior reverse leakage characteristics. Both parts maintain identical RoHS3 compliance and regulatory status.

Both parts are active products with full compliance to ROHS3, REACH Unaffected status, and EAR99 export classification. Selection between these parts depends on circuit power budget requirements and voltage regulation performance specifications rather than regulatory or compliance constraints.

Frequently Asked Questions (FAQ)

Q: Can MM3Z30VST1G be used as a direct replacement for GDZ30B-G3-08?

A: Yes. Both parts share identical 30 V zener voltage rating and SOD-323 surface mount packaging. The MM3Z30VST1G is mechanically and electrically compatible for direct PCB substitution. The higher power rating (300 mW) and lower impedance (2 Ohms) of the onsemi part provide equal or superior performance in voltage regulation applications.

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

A: Impedance (Zzt) directly affects voltage regulation quality. The GDZ30B-G3-08 has 200 Ohms maximum impedance, while the MM3Z30VST1G has 2 Ohms maximum impedance. Lower impedance results in better voltage stability and reduced output impedance variation across the operating current range. Applications requiring tight voltage regulation benefit from the lower impedance characteristic of the onsemi part.

Q: Are there temperature range differences that affect part selection?

A: The GDZ30B-G3-08 operates from -55°C to 150°C, while the MM3Z30VST1G operates from -65°C to 150°C (junction temperature). The onsemi part extends the lower temperature limit by 10°C, making it suitable for applications requiring operation in colder environments. Both parts maintain the same upper temperature limit.

Q: Do both parts have identical RoHS and regulatory compliance?

A: Yes. Both the GDZ30B-G3-08 and MM3Z30VST1G are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. They share identical moisture sensitivity level (MSL 1, unlimited). No compliance differences exist between these parts.

Q: What is the reverse leakage current difference, and does it matter?

A: The GDZ30B-G3-08 has 100 nA reverse leakage at 23 V, while the MM3Z30VST1G has 50 nA reverse leakage at 21 V. Lower reverse leakage indicates superior blocking characteristics and reduced standby current draw. The onsemi part provides approximately 50% lower leakage, beneficial for low-power or battery-operated applications.

Q: Can the GDZ30B-G3-08 be used in applications designed for the MM3Z30VST1G?

A: The GDZ30B-G3-08 can be used in most applications designed for the MM3Z30VST1G, provided the circuit power budget does not exceed 200 mW and the higher impedance (200 Ohms) is acceptable for voltage regulation performance. Applications with strict voltage regulation requirements or power dissipation exceeding 200 mW require the MM3Z30VST1G.

Q: Are these parts available in other package types?

A: Both parts are specified only in SOD-323 surface mount packaging. No alternative package options are provided in the component specifications.