PDZ18B-QZ Equivalent & Substitute Parts

Part Overview

The PDZ18B-QZ is an 18 V Zener diode manufactured by Nexperia USA Inc., rated for 400 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as an active product and is designed for voltage regulation and protection applications in electronic circuits. The PDZ18B-QZ is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements. Substitute parts are identified when equivalent electrical characteristics and mechanical compatibility are maintained across the same voltage rating, power rating, tolerance, and package specification.

Substiute Parts

PDZ18B-QZ

Nexperia USA Inc.In Stock: 804PDZ18B-QZ Datasheet

Current PartRFQ

PDZ18B,115

Nexperia USA Inc.In Stock: 2171PDZ18B,115 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PDZ18B-QZ are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Voltage - Zener (Nominal): 18 V
• Tolerance: ±2%
• Power - Maximum: 400 mW
• Impedance (Maximum): 20 Ohms
• Current - Reverse Leakage @ Vr: 50 nA @ 13 V
• Voltage - Forward (Maximum) @ If: 1.1 V @ 100 mA
• Operating Temperature (Junction): 150°C
• Package / Case: SC-76, SOD-323
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all these specifications are classified as parametric equivalents and are suitable for direct substitution in applications where the PDZ18B-QZ is specified.

Parameter Comparison

Engineering Selection Recommendations

The PDZ18B,115 is a direct parametric equivalent to the PDZ18B-QZ. Both parts are manufactured by Nexperia USA Inc. and share identical electrical specifications, mechanical packaging, and compliance certifications. Selection between these parts is based on availability and supply chain considerations.

PDZ18B-QZ is suitable for applications requiring the specific part number designation with current inventory of 737 pieces.

PDZ18B,115 is suitable for applications where the base product number variant is acceptable, with higher current inventory of 2,100 pieces available.

Both parts maintain active product status, ROHS3 compliance, REACH unaffected status, and AEC-Q101 automotive qualification (where applicable to the main part). No electrical or mechanical performance differences exist between these variants.

Frequently Asked Questions (FAQ)

Q: Can PDZ18B,115 be used as a direct replacement for PDZ18B-QZ?

A: Yes. The PDZ18B,115 is a parametric equivalent with identical voltage rating (18 V), tolerance (±2%), power rating (400 mW), impedance (20 Ohms maximum), reverse leakage current (50 nA @ 13 V), forward voltage (1.1 V @ 100 mA), operating temperature (150°C junction), and package specification (SOD-323). All electrical and mechanical parameters match exactly.

Q: Are there package differences between PDZ18B-QZ and PDZ18B,115?

A: No. Both parts use the SC-76, SOD-323 surface mount package with identical mechanical dimensions and land pattern requirements. PCB layout and assembly processes are interchangeable.

Q: Do both parts meet automotive qualification requirements?

A: The PDZ18B-QZ carries AEC-Q101 automotive qualification. The PDZ18B,115 specifications provided do not explicitly list AEC-Q101 qualification in the input data. Verify automotive qualification status with the manufacturer if AEC-Q101 compliance is a design requirement.

Q: What is the difference between PDZ18B-QZ and PDZ18B,115 part numbering?

A: PDZ18B-QZ and PDZ18B,115 are variant designations from Nexperia USA Inc. for the same base product (PDZ18B). The differences reflect packaging or distribution channel variations. Electrical performance and mechanical specifications are identical.

Q: Are there compliance or regulatory differences?

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

Q: Which part should be selected based on availability?

A: PDZ18B,115 has higher current inventory (2,100 pieces) compared to PDZ18B-QZ (737 pieces). Selection should be based on project lead time requirements and supply chain strategy. Both parts are active products with no end-of-life concerns.