CMLZDA3V3 TR Equivalent & Substitute Parts

Part Overview

The CMLZDA3V3 TR is a Zener Diode Array manufactured by Central Semiconductor Corp, configured as a 1 Pair Common Anode design with a nominal Zener voltage of 3.3 V. This component is rated for 250 mW maximum power dissipation and is packaged in SOT-563 surface mount configuration.

This part has reached obsolete product status. Identifying qualified substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this Zener diode array.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.3	V
Tolerance	±6.06%	%
Power - Max	250	mW
Impedance (Max)	95	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1 V
Configuration	1 Pair Common Anode	—
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-563, SOT-666	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CMLZDA3V3 TR is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

Nominal Zener voltage of 3.3 V
Configuration as 1 Pair Common Anode
Maximum impedance of 95 Ohms
Operating temperature range of -65°C to 150°C
Surface mount technology

Mechanical Compatibility Criteria:

SOT-23-3 package is mechanically compatible with SOT-563 footprint requirements for this application category
Moisture Sensitivity Level 1 (Unlimited) classification

The substitute part AZ23C3V3-7-F meets all specified electrical parameters and maintains functional equivalence while offering improved power rating (300 mW versus 250 mW) and tighter tolerance (±5% versus ±6.06%).

Parameter Comparison

Parameter	CMLZDA3V3 TR	AZ23C3V3-7-F	Match Status
Manufacturer	Central Semiconductor Corp	Diodes Incorporated	Different Manufacturer
Category	Diodes, Zener	Diodes, Zener	Equivalent
Voltage - Zener (Nom)	3.3 V	3.3 V	Equivalent
Tolerance	±6.06%	±5%	Substitute Superior
Power - Max	250 mW	300 mW	Substitute Superior
Impedance (Max)	95 Ohms	95 Ohms	Equivalent
Configuration	1 Pair Common Anode	1 Pair Common Anode	Equivalent
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	SOT-563, SOT-666	SOT-23-3	Compatible
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Active
RoHS Status	Not Specified	ROHS3 Compliant	Substitute Compliant

Engineering Selection Recommendations

The AZ23C3V3-7-F from Diodes Incorporated is the qualified substitute for the obsolete CMLZDA3V3 TR based on the following engineering criteria:

Electrical Compatibility: All critical electrical parameters match or exceed the original specification. The nominal Zener voltage, impedance, and operating temperature range are identical. The substitute provides improved tolerance (±5% versus ±6.06%) and increased power rating (300 mW versus 250 mW), offering enhanced performance margins.

Product Status: The substitute part maintains active product status with established supply chain availability (15,413 pcs in stock), ensuring long-term procurement reliability compared to the obsolete original part.

Compliance & Certifications: The AZ23C3V3-7-F is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Both parts share identical Moisture Sensitivity Level 1 classification.

Package Compatibility: While the original uses SOT-563 packaging and the substitute uses SOT-23-3, both are standard surface mount packages with compatible footprint requirements for this application category.

Frequently Asked Questions (FAQ)

Q: Can AZ23C3V3-7-F directly replace CMLZDA3V3 TR in existing designs?

A: Yes. The substitute part meets all specified electrical parameters including nominal Zener voltage (3.3 V), configuration (1 Pair Common Anode), impedance (95 Ohms max), and operating temperature range (-65°C to 150°C). Both components are surface mount Zener diode arrays with identical functional specifications.

Q: What are the differences between these parts?

A: The AZ23C3V3-7-F offers three improvements: tighter voltage tolerance (±5% versus ±6.06%), higher power rating (300 mW versus 250 mW), and active product status with established supply availability. The original CMLZDA3V3 TR is obsolete.

Q: Are the packages interchangeable?

A: The CMLZDA3V3 TR uses SOT-563 packaging while the AZ23C3V3-7-F uses SOT-23-3 packaging. Both are standard surface mount packages compatible with this application category. PCB layout verification is required to confirm footprint compatibility for your specific design.

Q: What is the impact of the tolerance difference?

A: The substitute part features ±5% tolerance compared to ±6.06% on the original. This represents tighter voltage regulation and improved consistency across production batches, providing better performance margins for voltage regulation applications.

Q: Are there any compliance or certification differences?

A: The AZ23C3V3-7-F is ROHS3 compliant and REACH unaffected. Both parts maintain Moisture Sensitivity Level 1 (Unlimited) classification. The substitute meets current regulatory requirements for new designs and production.

Q: What is the inventory status?

A: The original CMLZDA3V3 TR is obsolete with limited remaining stock (894 pcs). The substitute AZ23C3V3-7-F is an active product with substantial inventory availability (15,413 pcs), ensuring reliable long-term supply.

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