CLL4764 TR Equivalent & Substitute Parts

Part Overview

The CLL4764 TR is a Zener diode rated at 100 V, 1 W, manufactured by Central Semiconductor Corp in a surface mount MELF package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The obsolete status necessitates sourcing of functionally equivalent alternatives that maintain electrical and mechanical compatibility with existing circuit designs.

Substiute Parts

CLL4764 TR

Central Semiconductor CorpIn Stock: 1078CLL4764 TR Datasheet

Current PartRFQ

CDLL3044A

Microchip TechnologyIn Stock: 842CDLL3044A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4764 TR is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage rating: 100 V nominal
• Maximum power dissipation: 1 W
• Impedance (Max): 350 Ohms
• Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 200 mA
• Mounting type: Surface Mount

Mechanical Equivalence Criteria:

• Package / Case: DO-213AB or MELF
• Moisture Sensitivity Level: 1 (Unlimited)

The CDLL3044A from Microchip Technology satisfies all electrical and mechanical requirements for direct substitution. Both components share identical zener voltage, power rating, impedance specification, forward voltage characteristics, and surface mount packaging. The substitute maintains functional compatibility within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The CDLL3044A is the designated substitute for the obsolete CLL4764 TR based on the following factors:

Product Status: The CLL4764 TR is obsolete, while the CDLL3044A maintains active production status, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: Both components share identical zener voltage (100 V), power rating (1 W), impedance specification (350 Ohms max), and forward voltage characteristics (1.2 V @ 200 mA). These parameters ensure functional equivalence in circuit operation.

Mechanical Compatibility: Both components utilize the DO-213AB/MELF surface mount package with identical moisture sensitivity classification (MSL 1), enabling direct board-level substitution without layout modifications.

Compliance Considerations: The CDLL3044A is classified as RoHS non-compliant and REACH Unaffected. Design teams must evaluate compliance requirements against project specifications prior to implementation.

Operating Temperature: The CDLL3044A operates across -55°C to 175°C, which is narrower than the original part's -65°C to 200°C range. Applications requiring operation at the extreme temperature boundaries of the original specification require evaluation.

Frequently Asked Questions (FAQ)

Q: Can the CDLL3044A be used as a direct replacement for the CLL4764 TR?

A: Yes. Both components share identical zener voltage (100 V), power rating (1 W), impedance specification (350 Ohms), and surface mount DO-213AB/MELF packaging. Direct substitution is supported at the electrical and mechanical level.

Q: What is the difference in tolerance between the two parts?

A: The CLL4764 TR specifies ±5% tolerance, while the CDLL3044A specifies ±10% tolerance. Applications requiring tighter zener voltage tolerance must account for this specification difference.

Q: Are there temperature range limitations with the CDLL3044A?

A: The CDLL3044A operates from -55°C to 175°C, compared to the original part's -65°C to 200°C range. Designs requiring operation at temperatures below -55°C or above 175°C must evaluate alternative solutions.

Q: What is the reverse leakage current difference?

A: The CLL4764 TR specifies 5 µA @ 76 V reverse leakage, while the CDLL3044A specifies 500 nA @ 76 V. The substitute exhibits lower reverse leakage current, which may improve circuit performance in applications sensitive to leakage characteristics.

Q: Is the CDLL3044A RoHS compliant?

A: No. The CDLL3044A is classified as RoHS non-compliant. Design teams must verify compliance requirements against project and regulatory specifications.

Q: Can both parts be used interchangeably in PCB assembly?

A: Yes. Both components use identical DO-213AB/MELF surface mount packaging with MSL 1 moisture sensitivity classification, enabling direct PCB-level substitution without assembly process modifications.