PDZ3.9B-QF Zener Diode Equivalent & Substitute Parts

Part Overview

The PDZ3.9B-QF is a 3.9 V Zener diode rated for 400 mW maximum power dissipation in a surface mount SOD-323 package, manufactured by Nexperia USA Inc. This component is classified as Obsolete, indicating that direct procurement of the PDZ3.9B-QF may be limited or unavailable through standard distribution channels. Equivalent and substitute parts are necessary to maintain design continuity and ensure reliable component sourcing for production and repair applications.

Substiute Parts

PDZ3.9B-QF

Nexperia USA Inc.In Stock: 1026PDZ3.9B-QF Datasheet

Current PartRFQ

PDZ3.3B-QX

Nexperia USA Inc.In Stock: 723PDZ3.3B-QX Datasheet

MFR RecommendedRFQ

PDZ3.9B,115

Nexperia USA Inc.In Stock: 2235PDZ3.9B,115 Datasheet

Parametric EquivalentRFQ

PDZ3.9B-QX

Nexperia USA Inc.In Stock: 1012PDZ3.9B-QX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDZ3.9B-QF is determined by the following critical parameters: Zener voltage (Vz), maximum power rating, package type, and automotive qualification status. The substitute parts are grouped into two categories based on these criteria:

Parametric Equivalents maintain identical Zener voltage (3.9 V) and power rating (400 mW), differing only in packaging format or product status. These parts are direct functional replacements.

Voltage Variant Substitute provides an alternative Zener voltage (3.3 V) while maintaining the same power rating, impedance tolerance range, and package specifications. This substitute is applicable only when circuit design permits operation at the lower voltage threshold.

All substitute parts listed maintain the following specifications:

• Maximum power dissipation: 400 mW
• Tolerance: ±2%
• Package: SOD-323 (SC-76)
• Mounting: Surface Mount
• Operating temperature: 150°C (TJ)
• Automotive grade with AEC-Q101 qualification
• RoHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

PDZ3.9B,115 is a parametric equivalent offering identical electrical specifications to the PDZ3.9B-QF with the same 3.9 V Zener voltage and 400 mW power rating. This part is currently in Active product status and available in Cut Tape and Digi-Reel packaging formats. While automotive grade and AEC-Q101 qualification information is not specified for this variant, the electrical parameters are fully compatible. This part is suitable for applications requiring the original 3.9 V specification.

PDZ3.9B-QX is a parametric equivalent with identical electrical characteristics to the PDZ3.9B-QF, maintaining the 3.9 V Zener voltage, 400 mW power rating, and 90 Ohm maximum impedance. This part is currently in Active product status and carries full Automotive grade designation with AEC-Q101 qualification, matching the original part's compliance profile. The PDZ3.9B-QX is supplied in Tape & Reel packaging format and represents the most direct replacement for automotive applications.

PDZ3.3B-QX is a voltage variant substitute with a nominal Zener voltage of 3.3 V, differing from the original 3.9 V specification. This part maintains the same 400 mW power rating, SOD-323 package, and Automotive grade with AEC-Q101 qualification. The PDZ3.3B-QX exhibits slightly higher maximum impedance (95 Ohms versus 90 Ohms) and reverse leakage current (5 µA versus 3 µA at 1 V). This substitute is applicable only in circuit designs where the lower Zener voltage is functionally acceptable.

Frequently Asked Questions (FAQ)

Q: Can PDZ3.9B,115 be used as a direct replacement for PDZ3.9B-QF?

A: PDZ3.9B,115 provides identical electrical specifications including 3.9 V Zener voltage, 400 mW power rating, and 90 Ohm impedance. The part is currently in Active status. However, automotive grade and AEC-Q101 qualification details are not specified for this variant. Verification of compliance requirements for your specific application is necessary before selection.

Q: What is the difference between PDZ3.9B-QX and PDZ3.9B,115?

A: Both parts maintain identical 3.9 V Zener voltage and 400 mW power specifications. PDZ3.9B-QX is supplied in Tape & Reel format with confirmed Automotive grade and AEC-Q101 qualification. PDZ3.9B,115 is supplied in Cut Tape and Digi-Reel formats. Selection depends on packaging requirements and compliance verification needs.

Q: When is PDZ3.3B-QX an acceptable substitute?

A: PDZ3.3B-QX operates at 3.3 V nominal Zener voltage compared to the original 3.9 V specification. This part is acceptable only in applications where circuit design permits operation at the lower voltage threshold. The part maintains 400 mW power rating, SOD-323 package, and Automotive grade with AEC-Q101 qualification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. PDZ3.9B,115, PDZ3.9B-QX, and PDZ3.3B-QX are all RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original PDZ3.9B-QF specifications.

Q: What packaging formats are available for each substitute?

A: PDZ3.9B,115 is available in Cut Tape (CT) and Digi-Reel format. PDZ3.9B-QX and PDZ3.3B-QX are supplied in Tape & Reel (TR) format. Selection depends on production assembly requirements and inventory management practices.

Q: Do all substitute parts carry automotive qualification?

A: PDZ3.9B-QX and PDZ3.3B-QX carry Automotive grade designation with AEC-Q101 qualification. PDZ3.9B,115 does not specify automotive grade or AEC-Q101 qualification in available documentation. For automotive applications, PDZ3.9B-QX is the recommended selection.