PDZ9.1B-QX Equivalent & Substitute Parts Reference

Part Overview

The Nexperia PDZ9.1B-QX is a surface-mount Zener diode, 9.1V nominal Zener voltage, rated at 400 mW, enclosed in SOD-323 (SC-76) package. It is qualified for automotive applications with AEC-Q101 certification. This component is RoHS3 compliant and has an MSL of 1 (unlimited). When specifying Zener diodes, it is necessary to identify substitutes compatible with the electrical, mechanical, and environmental requirements, especially in cases of supply chain limitations or sourcing optimization.

Key Parameters

Parameter	Value
Manufacturer Part Number	PDZ9.1B-QX
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	9.1 V
Tolerance	±2%
Power - Max	400 mW
Impedance (Max) (Zzt)	10 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 6 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA
Operating Temperature	150°C (TJ)
Compliance/Qualifications	RoHS3, REACH Unaffected, AEC-Q101
Mounting Type	Surface Mount
Package / Case	SC-76, SOD-323
Product Status	Active

Substitute Part Grouping Explanation

Substitute Zener diodes are determined strictly by matching nominal Zener voltage (Vz), tolerance, power dissipation, maximum impedance, leakage current, forward voltage, operating temperature, mounting type, package, and qualification status. Only alternatives meeting or exceeding each specified parameter are grouped as equivalents.

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
Compliance/Qualifications (RoHS3, AEC-Q101 as required)

Parameter Comparison

Parameter	PDZ9.1B-QX	PDZ9.1B,115
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	9.1 V	9.1 V
Tolerance	±2%	±2%
Power - Max	400 mW	400 mW
Impedance (Max) (Zzt)	10 Ohms	10 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 6 V	500 nA @ 6 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA	1.1 V @ 100 mA
Operating Temperature	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	SC-76, SOD-323	SC-76, SOD-323
Compliance/Qualifications	RoHS3, REACH Unaffected, AEC-Q101	RoHS3, REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

The PDZ9.1B-QX and PDZ9.1B,115 Zener diodes are both RoHS3 compliant and have an MSL of 1 (unlimited). The PDZ9.1B-QX is AEC-Q101 qualified for automotive use, while qualification is not specified for PDZ9.1B,115 from the provided parameters. Both parts possess REACH unaffected status. Selection for automotive or other high-reliability applications should confirm AEC-Q101 qualification if required by end-use standards.

Frequently Asked Questions (FAQ)

Q1: What parameters are mandatory for substitution of Zener diodes in this category?
A1: Substitution requires matching Voltage - Zener (Nom), tolerance, power rating, impedance, leakage current, forward voltage, operating temperature, mounting type, package, and compliance with relevant standards.

Q2: Are the PDZ9.1B-QX and PDZ9.1B,115 footprint compatible?
A2: Yes. Both devices are in SC-76, SOD-323 surface mount packages and are footprint compatible.

Q3: Does AEC-Q101 qualification affect the choice of substitute?
A3: Yes. If automotive qualification is required, only parts with explicit AEC-Q101 qualification should be selected.

Q4: Can RoHS and REACH status affect substitution eligibility?
A4: Yes. Only substitutes that are RoHS3 compliant and REACH unaffected meet the same environmental and regulatory requirements.

Q5: Is there any difference in electrical performance between PDZ9.1B-QX and PDZ9.1B,115 based on provided parameters?
A5: No. Both parts share identical values for all listed key electrical parameters.

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