Equivalent & Substitute Parts for CDZT2R4.3B (Rohm Semiconductor)

Part Overview

CDZT2R4.3B is a Zener diode manufactured by Rohm Semiconductor, categorized under Diodes, Zener. It features a nominal Zener voltage of 4.3 V, maximum power dissipation of 100 mW, and is housed in a VMN2 (SOD-923) surface-mount package. The product status is "Not For New Designs," which makes it necessary to identify alternative models that match its electrical and mechanical parameters, ensuring suitable replacement in existing designs or inventory needs.

Key Parameters

Parameter	Description
Voltage - Zener (Nom) (Vz)	4.3 V
Tolerance	±3%
Power - Max	100 mW
Impedance (Max) (Zzt)	100 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V
Operating Temperature	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	2-SMD, Flat Lead
Supplier Device Package	VMN2 (SOD-923)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts are selected based on strict adherence to the following core parameters: Zener voltage (nominal), tolerance, maximum power dissipation, maximum impedance, reverse leakage current, operating temperature range, mounting type, package specifications, and regulatory compliance. Only parts that meet or exceed these criteria, as provided in the input, are included as valid equivalents or substitutes for CDZT2R4.3B.

Parameter Comparison

Parameter	CDZT2R4.3B (Rohm)	BZX585-B4V3,115 (Nexperia)	BZX585-B4V3,135 (Nexperia)
Voltage - Zener (Nom) (Vz)	4.3 V	4.3 V	4.3 V
Tolerance	±3%	±2%	±2%
Power - Max	100 mW	300 mW	300 mW
Impedance (Max) (Zzt)	100 Ohms	90 Ohms	90 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V	3 µA @ 1 V	3 µA @ 1 V
Operating Temperature	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	2-SMD, Flat Lead	SC-79, SOD-523	SC-79, SOD-523
Supplier Device Package	VMN2 (SOD-923)	SOD-523	SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

The primary selection driver is the product status of CDZT2R4.3B, which is "Not For New Designs." Substitute parts BZX585-B4V3,115 and BZX585-B4V3,135 are "Active" and meet the regulatory compliance criteria specified, including ROHS3 and REACH. Selection may proceed based solely on matching these provided compliance and certification statuses.

Frequently Asked Questions (FAQ)

Q1: What are the most critical parameters for substituting CDZT2R4.3B in a design?
A1: Zener voltage, tolerance, maximum power, maximum impedance, reverse leakage current, operating temperature range, mounting type, and package specifications.

Q2: Are substitute parts BZX585-B4V3,115 and BZX585-B4V3,135 compatible in terms of electrical performance?
A2: The listed substitutes match or exceed the core electrical parameters provided, including nominal Zener voltage, tolerance, maximum power, and maximum impedance.

Q3: Are there differences in mounting and packaging between the main part and substitutes?
A3: CDZT2R4.3B uses a VMN2 (SOD-923) package, while the substitutes use SOD-523. Direct interchange depends strictly on meeting mechanical and PCB layout requirements per provided specs.

Q4: How does product status affect component selection?
A4: CDZT2R4.3B is "Not For New Designs," signaling the need to transition to active or currently supported substitutes for ongoing production.

Q5: Are all substitute parts ROHS3 and REACH compliant?
A5: Yes, all listed substitutes indicate ROHS3 compliance and REACH unaffected status as per provided data.

Q6: Is there a difference in moisture sensitivity level (MSL)?
A6: All parts provided specify Moisture Sensitivity Level 1 (Unlimited).

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