Equivalent & Substitute Parts Reference for EDZVFHT2R4.3B

Part Overview

EDZVFHT2R4.3B is a Zener diode manufactured by Rohm Semiconductor, specifically designed for automotive applications requiring a 4.3 V nominal Zener voltage, 150 mW maximum power dissipation, and surface-mount compatibility in an EMD2 (SC-79, SOD-523) package. The part is currently active and stocked. Sourcing alternative models is necessary for supply chain resilience, platform flexibility, and inventory management, especially when identical key electrical or mechanical features are mandatory in the application.

Key Parameters

Parameter	Value
Manufacturer Part Number	EDZVFHT2R4.3B
Manufacturer	Rohm Semiconductor
Category	Diodes, Zener
Voltage - Zener (Nom)(Vz)	4.3 V
Tolerance	±3.02%
Power - Max	150 mW
Impedance (Max)(Zzt)	100 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V
Operating Temperature	150°C (TJ)
Grade / Qualification	Automotive / AEC-Q101
Mounting Type	Surface Mount
Package / Case	SC-79, SOD-523
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution decisions for Zener diodes in the Diodes, Zener category are strictly determined by matching the following allowed parameters: nominal Zener voltage, tolerance, maximum power dissipation, impedance, reverse leakage current, operating temperature, mounting type, package/case, and compliance statuses (RoHS, REACH, MSL). Only parts that meet or closely align with these parameters, as explicitly stated, are included as substitutes. The presence of common package types (SC-79, SOD-523) further assures mechanical compatibility.

Parameter Comparison

Parameter	Main: EDZVFHT2R4.3B	BZT585B4V3T-7	CMOZ4L3 TR PBFREE	CMOZ5V6 TR PBFREE
Manufacturer	Rohm Semiconductor	Diodes Incorporated	Central Semiconductor Corp	Central Semiconductor Corp
Voltage - Zener (Nom)(Vz)	4.3 V	4.3 V	4.3 V	5.6 V
Tolerance	±3.02%	±2%	±5%	±5%
Power - Max	150 mW	350 mW	250 mW	300 mW
Impedance (Max)(Zzt)	100 Ohms	150 Ohms	1600 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V	3 µA @ 1 V	1 µA @ 1.5 V	1 µA @ 2 V
Operating Temperature	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
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 substitute Zener diodes listed—BZT585B4V3T-7, CMOZ4L3 TR PBFREE, CMOZ5V6 TR PBFREE—have an active product status and are compliant with ROHS3, REACH, and have MSL 1 (Unlimited). Each model is supplied in a surface-mount, SC-79/SOD-523 package and meets inventory requirements for original, new stock. Selection between these substitutes can be determined solely by comparing the provided electrical and packaging parameters with application requirements.

Frequently Asked Questions (FAQ)

Q1: Why is nominal Zener voltage (Vz) critical in substitution?
A1: Zener diodes regulate at a specified voltage. Exact matching of the nominal Zener voltage is required within the allowed tolerance for functional equivalence.

Q2: What role does package compatibility play in substitution?
A2: All listed substitutes use the SC-79, SOD-523 package, ensuring direct board-level compatibility with the main part (EDZVFHT2R4.3B).

Q3: Can substitutes differ in power rating or impedance?
A3: If application requirements do not exceed the substitute’s maximum power rating or impedance, substitution is permissible based strictly on the input parameters.

Q4: Are compliance ratings such as RoHS3 essential for substitution?
A4: ROHS3 and REACH compliance are required for environmental acceptance. All listed substitute Zener diodes conform to these standards.

Q5: Does automotive and AEC-Q101 qualification affect substitute selection?
A5: Substitute selection must consider specified grade and qualification if required by the application, as provided in the input. Only the main part explicitly states automotive and AEC-Q101 grade.

Q6: How is moisture sensitivity level (MSL) relevant in engineering substitution?
A6: MSL 1 (Unlimited) ensures all components have a maximum reflow soldering shelf life, matching the original part for manufacturing processes.

Q7: Can any substitute part with higher voltage (e.g., 5.6 V) be used directly?
A7: Substitution is determined by provided Zener voltage values; only parts with identical voltage within the specified tolerance are suitable for direct replacement in standard applications. The CMOZ5V6 TR PBFREE is presented as a supplied substitute, but the Zener voltage differs from the main part.

Q8: Are reverse leakage current specifications relevant for substitution?
A8: Reverse leakage current must not exceed requirements stated for the main part, as all listed substitutes specify this parameter for direct comparison.

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