Equivalent & Substitute Parts for VDZT2R3.9B Zener Diode

Part Overview

The VDZT2R3.9B is a Zener Diode produced by Rohm Semiconductor and classified under the Diodes, Zener category. It features a nominal Zener voltage of 3.9 V, maximum power rating of 100 mW, ±3% tolerance, and is supplied in a surface mount SOD-723 package (VMD2). The part is ROHS3 compliant, with a moisture sensitivity level of 1 (unlimited), and is currently marked as obsolete. Given its product status, sourcing requires the identification of compatible alternatives with matching electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Manufacturer Part Number	VDZT2R3.9B
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	3.9 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	SOD-723
Supplier Device Package	VMD2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution is strictly based on matching the critical electrical and mechanical parameters pertinent to the product category. These parameters include Zener voltage (Vz), maximum power rating, tolerance, maximum impedance, reverse leakage current, operating temperature range, mounting type, and package/case. Only diodes within the same category and whose characteristics align with those of VDZT2R3.9B have been considered as substitutes.

Parameter Comparison

Parameter	VDZT2R3.9B	CDZVT2R3.9B	BZX884-B3V9,315
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Nexperia USA Inc.
Category	Diodes, Zener	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	3.9 V	3.9 V	3.9 V
Tolerance	±3%	-	±2%
Power - Max	100 mW	100 mW	250 mW
Impedance (Max) (Zzt)	100 Ohms	100 Ohms	90 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 1 V	5 µA @ 1 V	3 µA @ 1 V
Operating Temperature	-55°C ~ 150°C	150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-723	2-SMD, Flat Lead	SOD-882
Supplier Device Package	VMD2	VMN2M (SOD-923)	DFN1006-2
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

Engineering Selection Recommendations

The primary part, VDZT2R3.9B, is obsolete. All substitute parts listed (CDZVT2R3.9B and BZX884-B3V9,315) are active, meet ROHS3 compliance, and are rated for MSL 1 (Unlimited) and REACH Unaffected status. Selection should be based on the matching category, operational and compliance parameters provided.

Frequently Asked Questions (FAQ)

Q1: What electrical parameters are critical when selecting a Zener diode substitute for VDZT2R3.9B?
A1: The essential parameters include Zener voltage, power rating, tolerance, impedance, reverse leakage current, and operating temperature range.

Q2: Can the substitute parts be used in surface mount applications?
A2: All listed substitutes feature a surface mount configuration, but individual package/case types differ and should be evaluated for footprint compatibility.

Q3: Are the substitute Zener diodes compliant with current environmental regulations?
A3: All alternatives maintain ROHS3 compliance, MSL 1 (Unlimited), and REACH Unaffected status as required.

Q4: How does differing package/case types among the substitutes affect selection?
A4: While all substitutes are surface mount devices, differences in package and supplier device package numbers necessitate verification against board layout requirements.

Q5: Why is a direct substitute necessary for VDZT2R3.9B?
A5: VDZT2R3.9B is obsolete, rendering alternative selection essential for ongoing designs and inventory replenishment where identical electrical and compliance parameters are required.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message