Equivalent & Substitute Parts Reference: VDZT2R33B

Part Overview

VDZT2R33B is a Zener diode manufactured by Rohm Semiconductor, operating with a nominal Zener voltage of 33 V and a maximum power dissipation of 100 mW. The device features ±3% tolerance and is housed in a surface mount SOD-723 (VMD2) package. The part status is designated as obsolete, necessitating the identification of suitable substitute models to maintain supply continuity for designs requiring these electrical and mechanical characteristics.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Voltage - Zener (Nom)	Tolerance	Power - Max	Impedance (Max)	Current - Reverse Leakage @ Vr	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	RoHS Status	MSL	REACH Status	ECCN	HTSUS	Product Status
VDZT2R33B	Rohm Semiconductor	Diodes, Zener	33 V	±3%	100 mW	250 Ohms	100 nA @ 25 V	-55°C ~ 150°C	Surface Mount	SOD-723	VMD2	ROHS3 Compliant	1 (Unlimited)	REACH Unaffected	EAR99	8541.10.0050	Obsolete

Substitute Part Grouping Explanation

Substitution is based strictly on these key parameters:

Nominal Zener Voltage
Maximum Power Dissipation
Maximum Zener Impedance
Reverse Leakage Current at Rated Voltage
Mounting Type
Package / Case
Supplier Device Package
Compliance (RoHS, REACH)
Moisture Sensitivity Level
Operating Temperature Range Only parts matching these parameters are eligible as substitutes in the Diodes, Zener product category.

Parameter Comparison

Parameter	VDZT2R33B	CDZVT2R33B
Manufacturer	Rohm Semiconductor	Rohm Semiconductor
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom)	33 V	33 V
Power - Max	100 mW	100 mW
Impedance (Max)	250 Ohms	250 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 25 V	100 nA @ 25 V
Operating Temperature	-55°C ~ 150°C	150°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	SOD-723	2-SMD, Flat Lead
Supplier Device Package	VMD2	VMN2M (SOD-923)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050
Product Status	Obsolete	Active

Engineering Selection Recommendations

VDZT2R33B is obsolete and not recommended for new designs based on its product status. CDZVT2R33B is active and maintains compliance with ROHS3 and REACH, adheres to the same ECCN and HTSUS codes, and shares Moisture Sensitivity Level 1 (Unlimited). Engineering selection should prioritize active product status and regulatory compliance as supplied.

Frequently Asked Questions (FAQ)

Q1: What are the primary electrical parameters to consider for Zener diode substitution?
A1: The primary electrical parameters are nominal Zener voltage, maximum power dissipation, maximum Zener impedance, and reverse leakage current at the rated voltage.

Q2: Is it necessary to match the mounting type and package when substituting Zener diodes?
A2: Yes. Mounting type and package must be matched for physical compatibility with existing designs.

Q3: Are VLZT2R33B and CDZVT2R33B equivalent in terms of compliance requirements?
A3: Both parts are ROHS3 Compliant, REACH Unaffected, and share the same ECCN and HTSUS codes.

Q4: Why select an active part over an obsolete one in Zener diode replacement?
A4: Active status ensures continued availability and supply chain reliability for ongoing designs.

Q5: What differences exist in package between VDZT2R33B and CDZVT2R33B?
A5: VDZT2R33B utilizes the SOD-723 (VMD2) package, while CDZVT2R33B uses 2-SMD, Flat Lead with VMN2M (SOD-923) supplier device package as specified.

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