Equivalent & Substitute Parts for CDZT2R3.9B – Rohm Semiconductor

Part Overview

CDZT2R3.9B by Rohm Semiconductor is a surface mount Zener diode categorized under Diodes, Zener, supplied in Tape & Reel (TR) packaging. It features a nominal Zener voltage of 3.9 V, a maximum power rating of 100 mW, impedance of 100 Ohms, and a reverse leakage current of 5 µA @ 1 V. The part comes in a VMN2 (SOD-923) package and is ROHS3 compliant. The product status is "Not For New Designs," prompting the requirement to find alternative Zener diodes with matching key electrical and mechanical parameters for continuity and compatibility in existing and future designs.

Substiute Parts

CDZT2R3.9B

Rohm SemiconductorIn Stock: 16250CDZT2R3.9B Datasheet

Current PartRFQ

NZ9F3V9T5G

onsemiIn Stock: 8438NZ9F3V9T5G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute Zener diodes are grouped strictly according to equivalent electrical and mechanical parameters as provided. Criteria include: Zener voltage (Vz), tolerance, maximum power rating, impedance (Zzt), reverse leakage current, operating temperature range, mounting type, package/case, RoHS and REACH status, and moisture sensitivity level. All listed parameters must match or be within acceptable provided ranges to ensure substitution compatibility. Product status is also considered.

Parameter Comparison

Engineering Selection Recommendations

CDZT2R3.9B has a status of "Not For New Designs." Substitute part NZ9F3V9T5G is listed as "Active" and matches the provided compliance requirements such as ROHS3 and REACH Unaffected, with MSL 1 (Unlimited). Electrical and mechanical characteristics are in accordance with the specified parameters. Selection between these parts should be based strictly on product status and certification alignment.

Frequently Asked Questions (FAQ)

Q1: What key parameters must match for a Zener diode substitution?
A1: Substitution must match Zener voltage, tolerance, maximum power rating, impedance, reverse leakage current, operating temperature range, mounting type, package/case, and compliance certifications.

Q2: Is package compatibility ensured between CDZT2R3.9B and NZ9F3V9T5G?
A2: Both parts utilize the SOD-923 surface mount package, ensuring mechanical compatibility.

Q3: How does tolerance affect substitution in Zener diodes?
A3: Tolerance determines allowable variation in Zener voltage, and the substitute NZ9F3V9T5G uses ±5%. This must be verified against design requirements within the provided parameter.

Q4: Are compliance and certification (RoHS, REACH, MSL) sufficient for substitution?
A4: Both parts are ROHS3 compliant, REACH Unaffected, and rated MSL 1 (Unlimited), meeting specified regulatory requirements.

Q5: Why is it necessary to consider product status when substituting?
A5: Product status informs availability for new designs or continuity in production. CDZT2R3.9B is listed "Not For New Designs," whereas NZ9F3V9T5G is "Active," guiding selection toward parts with assured long-term support.