GDZ16LP3-7 Equivalent & Substitute Parts

Part Overview

The GDZ16LP3-7 is a 16 V, 250 mW Zener diode manufactured by Diodes Incorporated in a 0201 (0603 Metric) surface mount package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part carries automotive-grade qualification (AEC-Q101) and maintains ROHS3 compliance.

Substiute Parts

GDZ16LP3-7

Diodes IncorporatedIn Stock: 35385GDZ16LP3-7 Datasheet

Current PartRFQ

SZMMSZ5246BT1G

onsemiIn Stock: 35307SZMMSZ5246BT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GDZ16LP3-7 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Zener voltage: 16 V nominal with ±5% tolerance
• Operating temperature range: -55°C to 150°C
• Reverse leakage current: 100 nA specification
• Automotive-grade qualification: AEC-Q101 certification required
• RoHS3 compliance and unlimited moisture sensitivity level

Mechanical Compatibility Criteria:

• Surface mount mounting type
• Package form factor compatibility with PCB layout constraints

The substitute part SZMMSZ5246BT1G meets all electrical specifications and maintains automotive qualification. The primary difference is the package form factor (SOD-123 versus 0201/0603 Metric) and increased power rating (500 mW versus 250 mW). The higher power rating provides design margin without compromising electrical performance at the specified operating point.

Parameter Comparison

Engineering Selection Recommendations

The SZMMSZ5246BT1G is a direct electrical substitute for the GDZ16LP3-7 based on matching zener voltage, tolerance, operating temperature range, and automotive qualification status. Both components maintain AEC-Q101 certification and ROHS3 compliance, ensuring regulatory and quality requirements are satisfied.

The substitute part is currently in active production status with confirmed inventory availability, addressing the obsolescence of the original component. The increased power dissipation rating (500 mW versus 250 mW) provides additional thermal margin in the application without altering electrical performance at the specified operating point.

Package form factor differs between the two parts. The GDZ16LP3-7 uses a 0201 (0603 Metric) package, while the SZMMSZ5246BT1G uses SOD-123 packaging. PCB layout modifications are required to accommodate the larger SOD-123 footprint. Design teams must verify that the substitute package dimensions are compatible with available board space and thermal management requirements.

Frequently Asked Questions (FAQ)

Q: Can SZMMSZ5246BT1G directly replace GDZ16LP3-7 without circuit modifications?

A: Electrical substitution is valid. The zener voltage, tolerance, temperature range, and leakage current specifications are equivalent. However, the package form factor differs (SOD-123 versus 0201/0603 Metric), requiring PCB layout changes. Verify that board space accommodates the larger SOD-123 footprint.

Q: What is the significance of the higher power rating on the substitute part?

A: The SZMMSZ5246BT1G is rated for 500 mW maximum power dissipation compared to 250 mW for the GDZ16LP3-7. This higher rating provides additional thermal margin and does not negatively impact circuit performance. The component will operate within specification at power levels up to 250 mW, matching the original design requirement.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the GDZ16LP3-7 and SZMMSZ5246BT1G carry automotive-grade classification with AEC-Q101 qualification. They meet the same quality and reliability standards for automotive use.

Q: What is the difference in reverse leakage current specifications?

A: The GDZ16LP3-7 specifies 100 nA @ 11.2 V, while the SZMMSZ5246BT1G specifies 100 nA @ 12 V. Both measurements are at comparable reverse bias voltages within the zener operating region. The leakage current magnitude is identical.

Q: Is the SOD-123 package larger than the 0201 package?

A: Yes. The SOD-123 package is significantly larger than the 0201 (0603 Metric) package. Design teams must confirm that PCB layout can accommodate the larger footprint and that thermal dissipation paths are adequate for the application.

Q: Do both parts comply with environmental and regulatory requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is 1 (Unlimited) for both parts, indicating no special handling requirements during storage or assembly.