PZM3.9NB2,115 Equivalent & Substitute Parts Reference

Part Overview

The PZM3.9NB2,115 is a surface-mount Zener diode manufactured by NXP USA Inc. It features a Zener voltage of 3.9 V, power dissipation of 300 mW, ±2% tolerance, and is available in an SMT3 (TO-236-3, SC-59, SOT-23-3) package. The part status is marked as obsolete, making it necessary to identify alternatives with compatible electrical and mechanical attributes to ensure continued design support and system maintainability.

Key Parameters

Parameter	PZM3.9NB2,115
Voltage - Zener (Nom) (Vz)	3.9 V
Tolerance	±2%
Power - Max	300 mW
Impedance (Max) (Zzt)	90 Ohms
Current - Reverse Leakage @ Vr	3 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts are grouped strictly based on compatibility with the following key parameters: Zener voltage (3.9 V), electrical tolerance (±2%), maximum power dissipation (≥250 mW), maximum impedance (90 Ohms), reverse leakage (3 µA @ 1 V), forward voltage rating, identical or compatible surface-mount packaging (TO-236-3, SC-59, SOT-23-3), and matching or more lenient environmental compliance (RoHS, REACH). Only parts meeting all specified electrical and mechanical attributes are considered viable substitutes in this category.

Parameter Comparison

Parameter	PZM3.9NB2,115 NXP USA Inc.	BZX84B3V9-7-F Diodes Inc.	BZX84-B3V9,215 Nexperia USA Inc.
Voltage - Zener (Nom) (Vz)	3.9 V	3.9 V	3.9 V
Tolerance	±2%	±2%	±2%
Power - Max	300 mW	300 mW	250 mW
Impedance (Max) (Zzt)	90 Ohms	90 Ohms	90 Ohms
Current - Reverse Leakage @ Vr	3 µA @ 1 V	3 µA @ 1 V	3 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The original PZM3.9NB2,115 (NXP USA Inc.) is obsolete. Both BZX84B3V9-7-F (Diodes Incorporated) and BZX84-B3V9,215 (Nexperia USA Inc.) are active, RoHS3 compliant, and have an MSL of 1 (Unlimited) and REACH unaffected status. Substitute selection within this component category can be based on product status (active), RoHS compliance, and MSL/REACH status.

Frequently Asked Questions (FAQ)

Q1: What are the most critical parameters for substituting the PZM3.9NB2,115 Zener diode?
A1: The most critical parameters are Zener voltage, tolerance, maximum power dissipation, impedance, leakage current, mounting type, and package compatibility.

Q2: Which packages are compatible for direct substitution?
A2: TO-236-3, SC-59, and SOT-23-3 packages are listed as compatible in all referenced parts for this product group.

Q3: Is automotive qualification relevant for all substitutes?
A3: While BZX84-B3V9,215 offers automotive qualification (AEC-Q101), this is only provided in the input for that part and is not a selection criterion for all substitutes.

Q4: Do all substitute parts comply with RoHS and REACH standards?
A4: Yes, all parts listed as substitutes are ROHS3 compliant and REACH unaffected.

Q5: Are there differences in maximum power dissipation among substitutes?
A5: The original part and BZX84B3V9-7-F both have a 300 mW rating, while BZX84-B3V9,215 is rated at 250 mW. All other key parameters match within stated tolerances.

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