EDZVT2R4.3B Equivalent & Substitute Parts Reference

Part Overview

The Rohm Semiconductor EDZVT2R4.3B is a Zener diode rated for 4.3 V nominal Zener voltage, 150 mW maximum power dissipation, and ±3% voltage tolerance. It is packaged for surface-mount assembly using the SC-79/SOD-523 (EMD2) outline and features compliance with RoHS3 and REACH standards. The product is currently active with significant inventory. Identifying equivalent or substitute Zener diode models using the same critical parameters is essential for ensuring uninterrupted production, maintenance, or second-source qualification.

Key Parameters

Parameter	EDZVT2R4.3B Value
Voltage - Zener (Nom) (Vz)	4.3 V
Tolerance	±3%
Power - Max	150 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	SC-79, SOD-523
Supplier Device Package	EMD2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute Zener diodes are identified when they match or exceed critical electrical and mechanical parameters. Key substitution criteria are:

Zener voltage (nominal)
Tolerance
Power dissipation (maximum)
Impedance (maximum)
Reverse leakage current
Operating temperature range
Mounting type (surface mount)
Package / case compatibility (SC-79, SOD-523)
Compliance (RoHS, REACH)
Moisture Sensitivity Level (MSL)

Only products explicitly listed or identified within the provided parameters as substitutes are included.

Parameter Comparison

Parameter	EDZVT2R4.3B (Rohm Semiconductor)	BZT52C4V7T-7 (Diodes Inc.)	BZT585B4V3T-7 (Diodes Inc.)	CMOZ4L3 TR PBFREE (Central Semi)
Voltage - Zener (Nom) (Vz)	4.3 V	4.7 V	4.3 V	4.3 V
Tolerance	±3%	±6%	±2%	±5%
Power - Max	150 mW	300 mW	350 mW	250 mW
Impedance (Max) (Zzt)	100 Ohms	80 Ohms	150 Ohms	1600 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V	3 µA @ 2 V	3 µA @ 1 V	1 µA @ 1.5 V
Operating Temperature	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
Supplier Device Package	EMD2	SOD-523	SOD-523	SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All referenced Zener diodes, including EDZVT2R4.3B, BZT52C4V7T-7, BZT585B4V3T-7, and CMOZ4L3 TR PBFREE, are listed as active products and are compliant with ROHS3 and REACH. All parts have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), meeting standard industry management and compliance requirements.

Frequently Asked Questions (FAQ)

Q1: What is the most critical parameter when selecting a Zener diode substitute?
A1: The most critical parameters are Zener voltage (Vz), tolerance, maximum power dissipation, and package/case compatibility.

Q2: Why is package compatibility important for Zener diode substitution?
A2: Package compatibility ensures the substitute diode will fit and function correctly on the same PCB footprint as the original part.

Q3: Are the supplied substitutes RoHS and REACH compliant?
A3: All listed substitutes are ROHS3 Compliant and REACH Unaffected, matching the compliance requirements of the main part.

Q4: Can variations in tolerance impact substitution selection?
A4: Yes, the tolerance indicates the allowable spread in the Zener voltage and should be considered when matching alternates.

Q5: What is the significance of Moisture Sensitivity Level (MSL) for substitute parts?
A5: An MSL of 1 (Unlimited) indicates that the parts can be stored and handled without special moisture controls, facilitating easy interchange.

Q6: Is there package/case variation among substitutes?
A6: All substitutes use the SC-79, SOD-523 outline, with slight naming variation (e.g., EMD2, SOD-523). These designations refer to the same JEDEC outline.

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