PDZ15B/ZLF Equivalent & Substitute Parts

Part Overview

The PDZ15B/ZLF is a Zener diode manufactured by Nexperia USA Inc., rated at 14.66 V nominal with 400 mW power dissipation in a surface mount SOD-323 package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts operate within acceptable parameter tolerances for the intended application.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	14.66	V
Tolerance	±2%	-
Power - Max	400	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 11 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 100 mA
Operating Temperature	150	°C (TJ)
Mounting Type	Surface Mount	-
Package / Case	SC-76, SOD-323	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the PDZ15B/ZLF is determined by the following critical parameters: nominal Zener voltage, voltage tolerance, maximum power dissipation, impedance characteristics, reverse leakage current, forward voltage drop, operating temperature range, and package compatibility. All substitute parts must maintain surface mount SOD-323 packaging and ROHS3 compliance.

Parametric Equivalent Classification: Parts with identical nominal voltage (14.66 V), tolerance (±2%), power rating (400 mW), impedance (15 Ohms), and all electrical characteristics fall into this category.

Similar Substitute Classification: Parts with comparable but not identical electrical specifications, such as nominal voltage within the 15 V range, reduced power ratings (300 mW), or increased impedance (30 Ohms), are classified as similar substitutes. These parts operate within acceptable application tolerances but require circuit-level verification of performance impact.

Parameter Comparison

Parameter	PDZ15B/ZLF (Main)	PDZ15B/DG/B4X (Parametric Equivalent)	MM3Z15VT1G (Similar Substitute)
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	onsemi
Voltage - Zener (Nom)	14.66 V	14.66 V	15 V
Tolerance	±2%	±2%	±5%
Power - Max	400 mW	400 mW	300 mW
Impedance (Max)	15 Ohms	15 Ohms	30 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 11 V	50 nA @ 11 V	50 nA @ 10.5 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA	1.1 V @ 100 mA	900 mV @ 10 mA
Operating Temperature	150°C (TJ)	150°C (TJ)	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

PDZ15B/DG/B4X (Parametric Equivalent): This part is the direct parametric equivalent to the PDZ15B/ZLF. It maintains identical electrical specifications across all measured parameters and is manufactured by the same supplier (Nexperia USA Inc.). The PDZ15B/DG/B4X carries Active product status with 715 units in stock, providing immediate availability for production requirements. This part is recommended as the primary replacement for obsolete PDZ15B/ZLF applications. Both parts are ROHS3 compliant with MSL 1 rating and identical package specifications.

MM3Z15VT1G (Similar Substitute): The MM3Z15VT1G manufactured by onsemi operates as a similar substitute with the following parameter deviations: nominal Zener voltage of 15 V (compared to 14.66 V), voltage tolerance of ±5% (compared to ±2%), maximum power dissipation of 300 mW (compared to 400 mW), and impedance of 30 Ohms (compared to 15 Ohms). The MM3Z15VT1G provides an extended operating temperature range of -65°C to 150°C. This part is suitable for applications where the voltage and power deviations are acceptable within circuit design margins. The MM3Z15VT1G is Active with 161,300 units in stock. Both parts maintain ROHS3 compliance and SOD-323 packaging.

Frequently Asked Questions (FAQ)

Q: Can PDZ15B/DG/B4X be used as a direct replacement for PDZ15B/ZLF?

A: Yes. The PDZ15B/DG/B4X is a parametric equivalent with identical electrical and mechanical specifications. No circuit modifications are required for substitution.

Q: What are the key differences between PDZ15B/ZLF and MM3Z15VT1G?

A: The MM3Z15VT1G differs in nominal Zener voltage (15 V vs. 14.66 V), voltage tolerance (±5% vs. ±2%), maximum power dissipation (300 mW vs. 400 mW), and impedance (30 Ohms vs. 15 Ohms). The MM3Z15VT1G provides a wider operating temperature range.

Q: Are all substitute parts compatible with the SOD-323 package footprint?

A: Yes. All listed parts use the SC-76, SOD-323 package and are compatible with existing PCB layouts designed for the PDZ15B/ZLF.

Q: Do the substitute parts meet RoHS and REACH compliance requirements?

A: Yes. Both PDZ15B/DG/B4X and MM3Z15VT1G are ROHS3 compliant and REACH unaffected, matching the compliance profile of the original PDZ15B/ZLF.

Q: What is the moisture sensitivity level for substitute parts?

A: Both substitute parts carry MSL 1 (Unlimited) rating, identical to the original part. No special moisture control measures are required during storage or handling.

Q: When should MM3Z15VT1G be selected over PDZ15B/DG/B4X?

A: The MM3Z15VT1G should be selected when the extended operating temperature range (-65°C to 150°C) is required or when the reduced power dissipation (300 mW) and increased impedance (30 Ohms) are acceptable within circuit design specifications. The PDZ15B/DG/B4X remains the preferred choice for direct replacement applications.

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