PDZ18B-QF Equivalent & Substitute Parts

Part Overview

The PDZ18B-QF is a Zener diode manufactured by Nexperia USA Inc., classified as a surface mount component in the SOD-323 package. This 18 V, 400 mW Zener diode is designed for voltage regulation and protection applications in electronic circuits. The part maintains Active product status and carries automotive-grade qualification under AEC-Q101 standards. Substitute parts are identified when inventory constraints, supply chain disruptions, or procurement requirements necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

PDZ18B-QF

Nexperia USA Inc.In Stock: 1085PDZ18B-QF Datasheet

Current PartRFQ

PDZ18B,115

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDZ18B-QF is permissible with the PDZ18B,115 based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is determined by the following key parameters:

Zener voltage specification (18 V nominal with ±2% tolerance), maximum power dissipation rating (400 mW), impedance characteristics (20 Ohms maximum), reverse leakage current (50 nA @ 13 V), forward voltage drop (1.1 V @ 100 mA), and junction temperature rating (150°C). Both parts share identical package designation (SC-76, SOD-323), surface mount mounting type, and supplier device package specification. Compliance attributes including RoHS3 status, MSL rating of 1, and REACH unaffected classification are identical across both parts. Both parts are manufactured by Nexperia USA Inc. and maintain Active product status.

Parameter Comparison

Engineering Selection Recommendations

The PDZ18B,115 is a direct parametric equivalent to the PDZ18B-QF. Both parts are manufactured by Nexperia USA Inc. and maintain Active product status, ensuring continued availability and manufacturer support. Selection between these parts is based on inventory availability and procurement logistics rather than electrical or mechanical differentiation.

The PDZ18B-QF is qualified to AEC-Q101 automotive standards, while the PDZ18B,115 does not list this qualification in the provided specifications. For applications requiring explicit automotive-grade certification, the PDZ18B-QF is the appropriate selection. For general industrial and commercial applications where automotive qualification is not mandated, either part satisfies the electrical and mechanical requirements.

Both parts comply with RoHS3 regulations, carry MSL rating of 1 (unlimited moisture sensitivity), and are REACH unaffected. The SOD-323 package and surface mount configuration are identical, permitting direct board-level substitution without layout or assembly modifications.

Frequently Asked Questions (FAQ)

Q: Can PDZ18B,115 be used as a direct replacement for PDZ18B-QF in automotive applications?

A: The PDZ18B,115 is electrically and mechanically equivalent to the PDZ18B-QF. However, the PDZ18B-QF carries explicit AEC-Q101 automotive qualification. For applications requiring documented automotive-grade certification, the PDZ18B-QF is the specified part. For non-automotive applications, PDZ18B,115 is a valid substitute.

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use the SC-76, SOD-323 package and are configured for surface mount assembly. Direct board-level substitution is possible without layout modifications.

Q: What are the critical parameters that define substitution eligibility?

A: Substitution is determined by matching Zener voltage (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), junction temperature rating (150°C), and package type (SOD-323). All parameters are identical between the PDZ18B-QF and PDZ18B,115.

Q: Do both parts meet RoHS and REACH compliance requirements?

A: Yes. Both the PDZ18B-QF and PDZ18B,115 are ROHS3 compliant and REACH unaffected. Both carry MSL rating of 1, indicating unlimited moisture sensitivity tolerance.

Q: Is there an inventory advantage to selecting one part over the other?

A: The PDZ18B,115 currently has 2100 pieces in stock, while the PDZ18B-QF has 997 pieces available. For applications without automotive qualification requirements, the PDZ18B,115 offers greater inventory availability.