VDZT2R8.2B Equivalent & Substitute Parts Reference

Part Overview

The VDZT2R8.2B is a surface-mount Zener Diode from Rohm Semiconductor, specified for 8.2 V nominal Zener voltage, 100 mW maximum power dissipation, and packaged in SOD-723 format (VMD2). The product status is "Obsolete," which necessitates identification of alternative and substitute models for continued production and long-term maintenance. Substitute selection is driven by the need for parametric equivalence and availability in modern packaging options.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	8.2 V
Tolerance	±2%
Power - Max	100 mW
Impedance (Max) (Zzt)	30 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 5 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

Alternative Zener diodes are grouped strictly by matching the following electrical parameters: Zener voltage (8.2 V), tolerance (±2%), maximum power dissipation (equal or greater than 100 mW), maximum impedance (Zzt), and reverse leakage current at the specified reverse voltage. Surface-mount package compatibility and compliance statuses (RoHS3, REACH, MSL) are also included as selection criteria. Mechanical package formats are noted for compatibility with existing board layouts.

Parameter Comparison

Manufacturer Part Number	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	Moisture Sensitivity Level (MSL)	REACH Status
VDZT2R8.2B	8.2 V	±2%	100 mW	30 Ohms	500 nA @ 5 V	-55°C ~ 150°C	Surface Mount	SOD-723	VMD2	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
CDZVT2R8.2B	8.2 V	-	100 mW	30 Ohms	500 nA @ 5 V	150°C	Surface Mount	2-SMD, Flat Lead	VMN2M (SOD-923)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
CDZT2RA8.2B	8.2 V	±2%	100 mW	30 Ohms	500 nA @ 5 V	-55°C ~ 150°C	Surface Mount	2-SMD, Flat Lead	VMN2 (SOD-923)	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
BZX585-B8V2,115	8.2 V	±2%	300 mW	10 Ohms	700 nA @ 5 V	-65°C ~ 150°C (TJ)	Surface Mount	SC-79, SOD-523	SOD-523	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
BZX585-B8V2,135	8.2 V	±2%	300 mW	10 Ohms	700 nA @ 5 V	-65°C ~ 150°C	Surface Mount	SC-79, SOD-523	SOD-523	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected
BZX884-B8V2,315	8.2 V	±2%	250 mW	10 Ohms	700 nA @ 5 V	-65°C ~ 150°C	Surface Mount	SOD-882	DFN1006-2	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected

Engineering Selection Recommendations

Parts marked "Obsolete" indicate discontinued manufacturing and limited future supply, requiring active alternatives. Alternative Zener diodes such as CDZVT2R8.2B, CDZT2RA8.2B, BZX585-B8V2,115, BZX585-B8V2,135, and BZX884-B8V2,315 all have "Active" product status, ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) ratings. Each part is suitable for selection where environmental and regulatory certifications are required.

Frequently Asked Questions (FAQ)

Q1: What are the main criteria for selecting a substitute for VDZT2R8.2B?
A1: Substitute parts must match the Zener voltage (8.2 V), tolerance, maximum power dissipation, impedance, reverse leakage current, and mounting type. Package compatibility is also necessary.

Q2: Are there any differences in mounting or packaging between these substitutes?
A2: Substitutes are offered in various surface-mount packages (SOD-723, SOD-923, SOD-523, SOD-882), which may require verification of compatibility with the existing PCB layout.

Q3: Does environmental compliance differ between the main part and substitute options?
A3: All presented substitutes are ROHS3 compliant, REACH unaffected, and rated MSL 1 (Unlimited).

Q4: How does maximum power rating affect substitution?
A4: Substitutes have equal or higher power ratings than the obsolete part. Ensure that the replacement part meets or exceeds the required dissipation threshold.

Q5: What operating temperature ranges are supported?
A5: Substitute parts specify operating temperatures compatible with –55°C to 150°C or wider, meeting industry standards for surface-mount diodes.

Q6: Is reverse leakage current at test voltage a critical factor?
A6: Reverse leakage current at 5 V is given for all parts; select substitutes matching or with slightly higher leakage current values as permitted in the specification.

Q7: Which supplier device packages correspond to these parts?
A7: VDZT2R8.2B uses VMD2 (SOD-723); substitutes include VMN2, VMN2M (SOD-923), SOD-523, and DFN1006-2. Ensure mechanical compatibility during part selection.

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