PDZ16B/ZLF Equivalent & Substitute Parts

Part Overview

The PDZ16B/ZLF is a Zener diode manufactured by Nexperia USA Inc., rated at 16.18 V nominal with 400 mW power dissipation in a surface mount SOD-323 package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial applications requiring voltage regulation or transient protection.

Substiute Parts

PDZ16B/ZLF

Nexperia USA Inc.In Stock: 824PDZ16B/ZLF Datasheet

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MM3Z16VT1G

onsemiIn Stock: 89361MM3Z16VT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PDZ16B/ZLF is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage nominal rating within the application tolerance window
• Power dissipation capacity equal to or greater than the original specification
• Identical package type (SOD-323) and mounting configuration (Surface Mount)
• Impedance characteristics compatible with circuit requirements
• Reverse leakage current specifications suitable for the intended application

Secondary Compatibility Factors:

• Operating temperature range encompassing the original maximum junction temperature
• RoHS and REACH compliance status
• Moisture sensitivity level classification

The MM3Z16VT1G from onsemi qualifies as a substitute based on matching package geometry, mounting type, and zener voltage proximity, though with trade-offs in power rating, tolerance, and impedance specifications.

Parameter Comparison

Engineering Selection Recommendations

PDZ16B/ZLF (Original Part): The PDZ16B/ZLF is obsolete and no longer in active production. Existing inventory of 808 pieces is available but represents a finite supply. This part should be considered only for immediate short-term requirements or legacy system maintenance where exact specifications are non-negotiable.

MM3Z16VT1G (Substitute Part): The MM3Z16VT1G is an active product with substantial inventory availability (89,300 pieces). This part maintains identical package geometry and mounting configuration, ensuring mechanical and thermal compatibility. Both components carry ROHS3 compliance and unlimited moisture sensitivity rating, satisfying regulatory requirements for equivalent applications.

Substitution Feasibility: The MM3Z16VT1G presents a viable substitute for applications where the following conditions are met:

• Circuit design accommodates the 0.18 V nominal voltage difference (16 V vs. 16.18 V)
• Application tolerance permits ±6% zener voltage tolerance (versus ±2% of the original)
• Power dissipation requirements do not exceed 300 mW
• Circuit impedance characteristics are compatible with 40 Ohms maximum impedance
• Operating temperature range does not require sub-zero performance

Compliance Status: Both parts maintain equivalent regulatory compliance across RoHS, REACH, and ECCN classifications, eliminating compliance-related substitution barriers.

Frequently Asked Questions (FAQ)

Q: Can the MM3Z16VT1G directly replace the PDZ16B/ZLF in all applications?

A: Direct replacement is possible only when circuit design parameters accommodate the specified differences. The 0.18 V voltage difference, wider tolerance band (±6% vs. ±2%), reduced power rating (300 mW vs. 400 mW), and doubled impedance (40 Ohms vs. 20 Ohms) must be evaluated against application requirements. Circuits with tight voltage regulation specifications or high power dissipation demands may require design modification.

Q: What is the primary reason for substitution?

A: The PDZ16B/ZLF is classified as obsolete, indicating discontinued production. Substitution becomes necessary for new production runs, inventory replenishment, or long-term design continuity. The MM3Z16VT1G, being an active product, ensures ongoing availability and supply chain stability.

Q: Are the packages physically identical?

A: Both parts use the SOD-323 package designation. This ensures identical footprint, lead spacing, and mounting compatibility on printed circuit boards. No PCB redesign is required for package substitution.

Q: How do the electrical specifications compare?

A: The MM3Z16VT1G operates at 16 V nominal versus 16.18 V for the original part, representing a 0.18 V (1.1%) difference. The substitute exhibits wider tolerance (±6% vs. ±2%), lower maximum power dissipation (300 mW vs. 400 mW), and higher impedance (40 Ohms vs. 20 Ohms). Reverse leakage current remains equivalent at 50 nA, though measured at slightly different reference voltages.

Q: What are the inventory implications?

A: The PDZ16B/ZLF has limited inventory (808 pieces), while the MM3Z16VT1G has substantial availability (89,300 pieces). For production quantities exceeding current PDZ16B/ZLF stock, the substitute part ensures uninterrupted supply.

Q: Are regulatory certifications equivalent?

A: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 ECCN classification. Moisture sensitivity level is equivalent at MSL 1 (unlimited). No regulatory barriers exist to substitution.

Q: What packaging format is available for the substitute?

A: The MM3Z16VT1G is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The original part packaging format is not specified in available data.