VDZT2R18B Equivalent & Substitute Parts Reference

Part Overview

The VDZT2R18B from Rohm Semiconductor is an 18 V, 100 mW, surface-mount Zener diode provided in a SOD-723 (VMD2) package. This diode has a tight ±2% voltage tolerance and is intended for precision regulation and clamping applications. The product status for VDZT2R18B is Obsolete, making it necessary to identify alternative models with closely matched electrical and mechanical characteristics to ensure continuous design and production viability.

Substiute Parts

VDZT2R18B

Rohm SemiconductorIn Stock: 75194VDZT2R18B Datasheet

Current PartRFQ

CDZVT2R18B

Rohm SemiconductorIn Stock: 3895CDZVT2R18B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are evaluated based on matching electrical and mechanical parameters, including Zener voltage (Vz), maximum power rating, maximum impedance (Zzt), reverse leakage current, mounting style, and package compatibility. Only Zener diodes in the “Diodes, Zener” category with matching nominal voltage, power rating, and maximum leakage are considered valid substitutes. These parameters serve as the sole criteria for equivalency.

Parameter Comparison

Engineering Selection Recommendations

VDZT2R18B is classified as Obsolete, while CDZVT2R18B remains Active. Both are ROHS3 Compliant, have an MSL rating of 1 (Unlimited), and a REACH status of “Unaffected.” Both components are assigned ECCN EAR99 and HTS code 8541.10.0050. Selection between these models can be based on availability and product status, ensuring continued supply chain compliance and environmental conformity.

Frequently Asked Questions (FAQ)

Q1: What criteria are used to determine valid Zener diode substitutes?
A1: Substitutes are selected based on voltage rating, maximum power dissipation, impedance, reverse leakage current, mounting type, and package compatibility.

Q2: Are there any differences in regulatory compliance between VDZT2R18B and CDZVT2R18B?
A2: Both parts are ROHS3 Compliant, have MSL 1 ratings, are REACH Unaffected, and classified under ECCN EAR99.

Q3: Does the difference in package type affect substitute suitability?
A3: The main difference is SOD-723 for VDZT2R18B and SOD-923 Flat Lead for CDZVT2R18B; compatibility depends on the PCB footprint and assembly process requirements. All other specified parameters are equivalent.

Q4: Why is finding a substitute for VDZT2R18B necessary?
A4: VDZT2R18B is Obsolete, and alternative parts are required for design continuity and manufacturing support.

Q5: Are the substitute and main part interchangeable in terms of electrical performance?
A5: Electrically, both parts match on Zener voltage, power rating, impedance, leakage current, and mounting style as provided. Only package and case may differ.