Equivalent & Substitute Parts for PZM3.9NB1,115

Part Overview

The PZM3.9NB1,115 is a surface-mount Zener diode with a nominal Zener voltage of 3.9 V and a power rating of 300 mW, supplied in an SMT3 (TO-236-3, SC-59, SOT-23-3) package. Its key attributes include a ±2% voltage tolerance, maximum impedance of 90 Ohms, and operational temperature range from -65°C to 150°C. The device is RoHS3 compliant and unaffected by REACH. This part is classified as obsolete, making it essential to identify suitable electrical and mechanical equivalents from the Diodes, Zener category that match the defined parameters.

Substiute Parts

PZM3.9NB1,115

NXP USA Inc.In Stock: 897PZM3.9NB1,115 Datasheet

Current PartRFQ

BZX84-B3V9,215

Nexperia USA Inc.In Stock: 8645BZX84-B3V9,215 Datasheet

MFR RecommendedRFQ

BZX84B3V9-7-F

Diodes IncorporatedIn Stock: 3478BZX84B3V9-7-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute Zener diodes are grouped strictly based on the following criteria: nominal Zener voltage (3.9 V), voltage tolerance (±2%), maximum power rating, maximum Zener impedance (90 Ohms), reverse leakage current (3 µA @ 1 V), forward voltage, operating temperature range (-65°C to 150°C), surface-mount compatibility, and package equivalency (TO-236-3, SC-59, SOT-23-3, SMT3/MPAK). RoHS and REACH compliance, as well as moisture sensitivity level (MSL 1), are also required. Only parts matching these key parameters are considered as equivalents or substitutes.

Parameter Comparison

Engineering Selection Recommendations

The PZM3.9NB1,115 is obsolete, while BZX84B3V9-7-F and BZX84-B3V9,215 are currently active and available, meeting the required RoHS3 and REACH compliance and moisture sensitivity criteria. Selection within this group is based strictly on matching electrical specifications, mechanical package, and regulatory compliance.

Frequently Asked Questions (FAQ)

Q1: What are the most critical parameters for selecting a Zener diode substitute?
A1: The critical parameters are Zener voltage (Vz), voltage tolerance, maximum power rating, maximum Zener impedance (Zzt), reverse leakage current, forward voltage, operating temperature range, mounting type, and package/case compatibility.

Q2: Can I substitute a 250 mW part for the original 300 mW Zener diode?
A2: Substitute selection is valid if the actual power requirements do not exceed the maximum rating of 250 mW. Both power ratings should be considered relative to the application needs and the provided official parameters.

Q3: How important is package compatibility in substitution?
A3: It is essential. All listed equivalents and substitutes are in packages: TO-236-3, SC-59, or SOT-23-3, which are compatible with the original PZM3.9NB1,115 SMT3/MPAK.

Q4: Are BZX84-B3V9,215 and BZX84B3V9-7-F compliant with RoHS and REACH?
A4: Yes, both substitute parts are explicitly listed as ROHS3 compliant and REACH unaffected.

Q5: What moisture sensitivity level do these Zener diodes have?
A5: All parts, including the substitutes, have a Moisture Sensitivity Level (MSL) of 1 (Unlimited).