Equivalent & Substitute Parts Reference for CDZT2RA3.9B

Part Overview

CDZT2RA3.9B is a Zener diode manufactured by Rohm Semiconductor, categorized under Diodes, Zener. The device features a nominal Zener voltage of 3.9 V, maximum power dissipation of 100 mW, and is provided in a surface mount VMN2 (SOD-923) package. The part is currently listed as active and ROHS3 compliant. Sourcing alternatives and parametric equivalents is necessary to maintain supply chain stability, provide design flexibility, and meet inventory requirements in scenarios where the original part is unavailable or allocation-limited.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	MSL	REACH Status	ECCN	HTSUS
CDZT2RA3.9B	Rohm Semiconductor	Diodes, Zener	3.9 V	±3.46%	100 mW	100 Ohms	5 µA @ 1 V	150°C (TJ)	Surface Mount	2-SMD, Flat Leads	VMN2 (SOD-923)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050

Substitute Part Grouping Explanation

Substitute part eligibility is strictly based on the following parameters:

Zener voltage (nominal)
Power rating (max)
Impedance (max)
Reverse leakage at specified voltage
Package, mounting type
Operating temperature range
Compliance certifications (RoHS, REACH) Parts are grouped as equivalents where all these parameters align or fall within provided specifications without deviation. Part status and inventory levels can also influence selection for continuity.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	MSL	REACH Status	ECCN	HTSUS
CDZT2RA3.9B	Rohm Semiconductor	3.9 V	±3.46%	100 mW	100 Ohms	5 µA @ 1 V	150°C (TJ)	Surface Mount	2-SMD, Flat Leads	VMN2 (SOD-923)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050
CDZVT2R3.9B	Rohm Semiconductor	3.9 V	-	100 mW	100 Ohms	5 µA @ 1 V	150°C	Surface Mount	2-SMD, Flat Lead	VMN2M (SOD-923)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050
BZT585B3V9T-7	Diodes Incorporated	3.9 V	±2%	350 mW	90 Ohms	3 µA @ 1 V	-65°C ~ 150°C	Surface Mount	SC-79, SOD-523	SOD-523	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050

Engineering Selection Recommendations

All listed substitute parts hold active status and are ROHS3 compliant, with MSL 1 (Unlimited) and REACH Unaffected certifications. Substitution can be validated based solely on these compliance attributes when electrical and mechanical parameters align as documented in this reference.

Frequently Asked Questions (FAQ)

Q1. What are the critical parameters for selecting a substitute Zener diode for CDZT2RA3.9B?
A1. Critical parameters include Zener voltage, maximum power, impedance, reverse leakage current, package/case type, mounting type, and compliance statuses.

Q2. Is package/case compatibility essential for substitution in surface mount applications?
A2. Yes. Substitute parts must match the mounting type and have comparable package or supplier device packages to ensure assembly compatibility.

Q3. Do all substitutes listed comply with RoHS and REACH regulations?
A3. All immediate substitutes in this reference have ROHS3 compliant and REACH Unaffected status.

Q4. How does part status impact substitute selection?
A4. Only active components are shown, ensuring that substitutes selected are currently in production and available for procurement.

Q5. Are tolerance and maximum power values required to match exactly for substitution?
A5. Substitution eligibility is strictly determined by the provided values; parts must have matching or documented values within those specified in this reference.

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