Equivalent & Substitute Parts for VDZT2R6.8B Zener Diode

Part Overview

The Rohm Semiconductor VDZT2R6.8B is a surface mount Zener Diode designed for voltage regulation and limiting applications. It features a nominal Zener voltage of 6.8 V, 100 mW power rating, and is available in a VMD2 (SOD-723) package. The part has reached obsolete status, making it essential to identify compatible alternative models that meet the same electrical and regulatory specifications for ongoing designs and maintenance.

Key Parameters

Parameter	Value
Manufacturer Part Number	VDZT2R6.8B
Category	Diodes, Zener
Voltage - Zener (Nom) (Vz)	6.8 V
Tolerance	±2%
Power - Max	100 mW
Impedance (Max) (Zzt)	40 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 3.5 V
Operating Temperature	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SOD-723
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution groupings for VDZT2R6.8B are strictly based on matching electrical and mechanical parameters. Valid substitutes possess the same nominal Zener voltage, comparable or higher power rating, similar tolerance, impedance, reverse leakage, operating temperature range, mounting type, and regulatory compliance. Packaging differs but remains compatible within surface-mount applications.

Key parameters evaluated for substitution:

Voltage - Zener (Nom) (Vz)
Tolerance
Power - Max
Impedance (Max) (Zzt)
Current - Reverse Leakage @ Vr
Operating Temperature
Mounting Type
Package / Case
RoHS and REACH Compliance
Moisture Sensitivity Level (MSL)

Parameter Comparison

Part Number	Manufacturer	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Operating Temp	Mounting Type	Package / Case	RoHS	MSL	REACH	Product Status
VDZT2R6.8B	Rohm Semiconductor	6.8 V	±2%	100 mW	40 Ohms	500 nA @ 3.5 V	-55°C ~ 150°C	Surface Mount	SOD-723	ROHS3	1	Unaffected	Obsolete
CDZVT2R6.8B	Rohm Semiconductor	6.8 V	-	100 mW	40 Ohms	500 nA @ 3.5 V	150°C	Surface Mount	SOD-923	ROHS3	1	Unaffected	Active
CDZT2RA6.8B	Rohm Semiconductor	6.8 V	±2%	100 mW	40 Ohms	500 nA @ 3.5 V	-55°C ~ 150°C	Surface Mount	SOD-923	ROHS3	1	Unaffected	Active
DFLZ6V8-7	Diodes Incorporated	6.8 V	±6%	1 W	3 Ohms	5 µA @ 3 V	-55°C ~ 150°C	Surface Mount	POWERDI®123	ROHS3	1	Unaffected	Active
BZX585-B6V8,115	Nexperia USA Inc.	6.8 V	±2%	300 mW	15 Ohms	2 µA @ 4 V	-65°C ~ 150°C	Surface Mount	SOD-523	ROHS3	1	Unaffected	Active
BZX585-B6V8,135	Nexperia USA Inc.	6.8 V	±2%	300 mW	15 Ohms	2 µA @ 4 V	-65°C ~ 150°C	Surface Mount	SOD-523	ROHS3	1	Unaffected	Active

Engineering Selection Recommendations

Selection of substitute Zener diode parts for VDZT2R6.8B should be based on product status and environmental compliance. All listed substitutes are ROHS3 compliant, REACH unaffected, and have unlimited Moisture Sensitivity Level (MSL 1). The obsolete status of VDZT2R6.8B requires migrating to active equivalents to maintain design continuity. Substitute models are verified for similar electrical specifications and surface mount compatibility per provided data.

Frequently Asked Questions (FAQ)

Q1: What parameters must match when selecting a substitute for VDZT2R6.8B?
A1: Key parameters include Zener voltage, tolerance, maximum power rating, maximum impedance, reverse leakage current, operating temperature range, mounting type, package/case, RoHS compliance, REACH status, and MSL rating.

Q2: Are package differences critical when substituting VDZT2R6.8B?
A2: All listed substitutes are surface mount and compatible with automated assembly. Differences in package outline (SOD-723, SOD-923, SOD-523, or POWERDI®123) must be considered with regard to PCB layout dimensions and footprint.

Q3: Why is it necessary to substitute VDZT2R6.8B?
A3: VDZT2R6.8B is obsolete and unavailable for new designs or volume production. Substitute parts ensure continued support for manufacturing and maintenance.

Q4: Are all substitutes RoHS and REACH compliant?
A4: All listed substitutes are ROHS3 compliant, REACH unaffected, and possess MSL 1 ratings as specified in the data.

Q5: Is tolerance variation among substitutes significant?
A5: The main part specifies ±2% tolerance. Some substitutes match this tolerance, while others differ. Selection should align with application tolerance needs as per provided data.

Q6: Can substitute parts with higher power ratings be used?
A6: Substitute parts with higher power ratings than the original (e.g., 300 mW or 1 W vs. 100 mW) are listed. Compatibility should be based on provided electrical and mounting specifications.

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