Equivalent & Substitute Parts Reference for PDZ18B-QX Zener Diode

Part Overview

The PDZ18B-QX by Nexperia USA Inc. is an automotive-grade Zener diode designed for voltage regulation applications. This part delivers a nominal Zener voltage of 18 V, with a rated maximum power dissipation of 400 mW and tight ±2% voltage tolerance. The component is supplied in a compact SOD-323 (SC-76) surface mount package, fully AEC-Q101 qualified for automotive use, and active in production. Selection of alternative models is necessary to ensure continuous manufacturing, maintain regulatory compliance, or address inventory needs.

Substiute Parts

PDZ18B-QX

Nexperia USA Inc.In Stock: 1163PDZ18B-QX Datasheet

Current PartRFQ

PDZ18B,115

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute relationships for Zener diodes are determined by matching the following key electrical and mechanical parameters: Zener voltage (Vz), voltage tolerance, maximum power dissipation, maximum Zener impedance (Zzt), reverse leakage current at specified voltage (Vr), forward voltage at rated current (If), operating temperature, mounting type, and package specification. Compliance characteristics such as RoHS and AEC-Q101 qualification are mandatory for cross-category and automotive-grade substitution. Only parts fully matching these specifications are considered equivalent substitutes.

Key parameters for substitution:

• Voltage - Zener (Nom) (Vz)
• Tolerance
• Power - Max
• Impedance (Max) (Zzt)
• Current - Reverse Leakage @ Vr
• Voltage - Forward (Vf) (Max) @ If
• Operating Temperature
• Mounting Type
• Package / Case
• Supplier Device Package
• RoHS Status
• Product Status
• Qualification
• Moisture Sensitivity Level (MSL)
• REACH Status
• ECCN
• HTSUS

Parameter Comparison

Engineering Selection Recommendations

For PDZ18B-QX, engineering substitution with PDZ18B,115 is permitted as all parametric values provided are identical or equivalent within the allowed specification. Product status for both parts is active, and RoHS3 compliance is confirmed for each. Automotive grade and AEC-Q101 qualification should be referenced if required for the application, as PDZ18B-QX includes these, while PDZ18B,115 provides no explicit AEC-Q101 status in the provided parameters. Moisture Sensitivity Level (MSL) and REACH compliance are identical and meet standard requirements.

Frequently Asked Questions (FAQ)

Q: What are the primary parameters required for Zener diode substitution?
A: Zener voltage, tolerance, maximum power, impedance, reverse leakage current, forward voltage, operating temperature, mounting type, and package compatibility are essential. Compliance factors like RoHS and AEC-Q101 are additionally relevant for regulated and automotive applications.

Q: Can PDZ18B,115 be used as a direct replacement for PDZ18B-QX?
A: All provided electrical and mechanical specifications for PDZ18B,115 match those of PDZ18B-QX. Use PDZ18B,115 when AEC-Q101 qualification is not strictly mandated by application.

Q: What package compatibility considerations exist between PDZ18B-QX and PDZ18B,115?
A: Both parts utilize the SC-76, SOD-323 surface mount package and share the SOD-323 supplier device package modifier, ensuring compatibility for automated and manual assembly.

Q: Is there any difference in compliance or regulatory status between the two parts based on provided data?
A: Both parts are RoHS3 compliant and REACH unaffected. Only PDZ18B-QX is explicitly specified as AEC-Q101 qualified.

Q: What is the Moisture Sensitivity Level (MSL) for both parts?
A: The MSL is 1 (Unlimited) for both, indicating suitability for all standard reflow processes with no shelf-life limitations.