CLL4714 BK Zener Diode 33V 500mW Equivalent & Substitute Parts

Part Overview

The CLL4714 BK is a Zener diode rated at 33 V nominal voltage with 500 mW maximum power dissipation, manufactured by Central Semiconductor Corp in the SOD-80 (DO-213AC, MINI-MELF) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The substitute part CMHZ4714 BK maintains identical electrical specifications while offering active product status and improved availability.

Substiute Parts

CLL4714 BK

Central Semiconductor CorpIn Stock: 671CLL4714 BK Datasheet

Current PartRFQ

CMHZ4714 BK

Central Semiconductor CorpIn Stock: 799CMHZ4714 BK Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4714 BK is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Zener voltage: 33 V nominal
• Power rating: 500 mW maximum
• Voltage tolerance: ±5%
• Reverse leakage current: 10 nA @ 25 V
• Forward voltage: 1.5 V @ 100 mA maximum
• Surface mount technology requirement
• Operating temperature range capability

The CMHZ4714 BK qualifies as a direct substitute based on matching all electrical specifications. The primary difference is the package format (SOD-123 versus SOD-80), which represents a mechanical variation within acceptable substitution parameters for surface mount applications. The CMHZ4714 BK additionally maintains active product status with REACH compliance documentation.

Parameter Comparison

Engineering Selection Recommendations

For CLL4714 BK Replacement:

The CMHZ4714 BK is the primary substitute for the obsolete CLL4714 BK. Both components share identical electrical specifications across all critical parameters: 33 V zener voltage, 500 mW power rating, ±5% tolerance, and matching forward and reverse leakage characteristics. The CMHZ4714 BK offers the advantage of active product status, ensuring continued availability and supply chain reliability.

Package Consideration:

The transition from SOD-80 to SOD-123 packaging requires PCB layout modification. Both packages are industry-standard surface mount formats with different footprint geometries. SOD-123 is a smaller package variant, which may provide space optimization benefits in compact designs.

Temperature Range:

The CMHZ4714 BK operates across -65°C to 150°C, compared to the CLL4714 BK range of -65°C to 200°C. Applications requiring operation above 150°C junction temperature require thermal analysis to confirm the substitute part remains within acceptable operating limits.

Compliance and Certifications:

Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications. The CMHZ4714 BK includes REACH Unaffected status, confirming compliance with European chemical regulations.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4714 BK directly replace the CLL4714 BK in existing designs?

A: Electrical substitution is direct. PCB layout modification is required due to package format change from SOD-80 to SOD-123. Both are surface mount packages with different footprints and pin configurations.

Q: What is the primary reason for substitution?

A: The CLL4714 BK is classified as obsolete. The CMHZ4714 BK maintains identical electrical performance while offering active product status and ongoing supply availability.

Q: Are there thermal performance differences between the two parts?

A: Both parts are rated for 500 mW maximum power dissipation. The CMHZ4714 BK operating temperature range extends to 150°C junction temperature, compared to 200°C for the CLL4714 BK. Thermal design must account for this difference in applications approaching maximum power ratings.

Q: Do both parts meet the same regulatory requirements?

A: Both parts carry identical ECCN and HTSUS classifications. The CMHZ4714 BK includes REACH Unaffected certification, confirming compliance with European chemical substance regulations.

Q: What are the package dimensions and pin spacing differences?

A: The CLL4714 BK uses SOD-80 (DO-213AC, MINI-MELF) packaging, while the CMHZ4714 BK uses SOD-123 packaging. These are distinct surface mount package formats with different footprint geometries. Consult manufacturer datasheets for specific dimensional specifications.

Q: Is the ±5% voltage tolerance maintained in the substitute part?

A: Yes. Both the CLL4714 BK and CMHZ4714 BK maintain ±5% tolerance on the 33 V nominal zener voltage specification.

Q: Can the CMHZ4714 BK be used in high-temperature applications above 150°C?

A: The CMHZ4714 BK is rated to 150°C junction temperature. Applications requiring operation above this temperature require alternative component selection or thermal management design review.