CDZT2RA4.3B Equivalent & Substitute Parts Reference

Part Overview

CDZT2RA4.3B, manufactured by Rohm Semiconductor, is a Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.3 V, a maximum power dissipation of 100 mW, and is supplied in a surface-mount VMN2 (SOD-923) package. The part is listed as active with RoHS3 compliance and is suitable for surface mount assembly. Considering potential inventory constraints, EOL notifications, automotive qualification, or mechanical footprint requirements, alternative models with equivalent key parameters can be required for engineering continuity or multi-sourcing strategy.

Key Parameters

Parameter	Value
Manufacturer Part Number	CDZT2RA4.3B
Manufacturer	Rohm Semiconductor
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	4.3 V
Tolerance	±3.02%
Power - Max	100 mW
Impedance (Max) (Zzt)	100 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	2-SMD, Flat Leads
Supplier Device Package	VMN2 (SOD-923)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Alternative and equivalent parts for the CDZT2RA4.3B are grouped strictly based on the following key electrical and mechanical parameters: Zener voltage (4.3 V nominal), maximum power dissipation (100 mW or higher), reverse leakage current at test voltage, impedance at test current, package type (surface mount SOD-923 or SOD-523), operating temperature range, RoHS3 and REACH compliance, and moisture sensitivity level. Substitution is determined by exact or better matching of these attributes.

Parameter Comparison

Parameter	CDZT2RA4.3B	CDZVT2R4.3B	CDZFHT2RA4.3B	BZT585B4V3T-7
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor	Diodes Incorporated
Voltage - Zener (Nom) (Vz)	4.3 V	4.3 V	4.3 V	4.3 V
Tolerance	±3.02%	-	±3.02%	±2%
Power - Max	100 mW	100 mW	100 mW	350 mW
Impedance (Max) (Zzt)	100 Ohms	100 Ohms	100 Ohms	150 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V	5 µA @ 1 V	5 µA @ 1 V	3 µA @ 1 V
Operating Temperature	150°C (TJ)	150°C	150°C (TJ)	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	2-SMD, Flat Leads	2-SMD, Flat Lead	2-SMD, Flat Lead	SC-79, SOD-523
Supplier Device Package	VMN2 (SOD-923)	VMN2M (SOD-923)	VMN2 (SOD-923)	SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Selection among the listed substitute parts can be determined using their active status, availability, and compliance to RoHS3 and REACH requirements. All compared options maintain at least MSL 1 (Unlimited) moisture level and are suitable for surface mount assembly. For automotive or qualification-specific requirements, the automotive grade (AEC-Q101) part number may be selected based on input suitability.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for selecting a Zener diode substitute in this category?
A1: Substitute parts must have the same nominal Zener voltage, equivalent or better tolerance, maximum power rating, reverse leakage current, impedance, and must be supplied in an equivalent surface mount package with matching compliance status.

Q2: Do substitutions require identical package types?
A2: Packages must be surface mount and match in functionality (e.g., SOD-923, SOD-523). Board footprint compatibility should be verified based on package details provided.

Q3: How is compliance status considered in substitution?
A3: Only parts with ROHS3 and REACH unaffected status are included for substitution to meet environmental regulations and assembly process compatibility.

Q4: Are automotive-grade substitutes available?
A4: CDZFHT2RA4.3B offers automotive-grade (AEC-Q101) qualification. Selection depends on whether such qualification is mandated for the application.

Q5: Can differences in maximum power handling affect substitution?
A5: Substitute parts listed have the same or higher power rating relative to CDZT2RA4.3B as per the provided input parameters.

Q6: Is reverse leakage current a constraint for substitution?
A6: All listed substitutes meet or exceed the specified reverse leakage characteristics at the indicated test voltage.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message