CLL4620 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4620 BK is a 3.3 V Zener diode rated at 500 mW, manufactured by Central Semiconductor Corp in the SOD-80 (DO-213AC, MINI-MELF) surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance specifications.

Substiute Parts

CLL4620 BK

Central Semiconductor CorpIn Stock: 835CLL4620 BK Datasheet

Current PartRFQ

CMHZ4620 BK

Central Semiconductor CorpIn Stock: 671CMHZ4620 BK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4620 BK is determined by electrical parameter equivalence and package compatibility. The primary substitute identified is the CMHZ4620 BK, which maintains identical zener voltage (3.3 V), power rating (500 mW), tolerance (±5%), impedance (1650 Ohms maximum), and reverse leakage current (7.5 µA @ 1.5 V) specifications. The critical distinction between the main part and its substitute is the package format: the CLL4620 BK uses SOD-80 (MINI-MELF), while the CMHZ4620 BK uses SOD-123. This package difference requires physical board layout verification prior to substitution.

The CMHZ4620 BK is classified as an active product, providing supply continuity advantages over the obsolete CLL4620 BK. Additional cross-reference alternatives (BZT52C3V3LP-7, BZT52C3V3-HE3-08, BZT52C3V3-7-F, MMSZ5226B-7-F, MMSZ5226C-E3-08) share the core electrical specifications but may introduce variations in forward voltage characteristics and operating temperature ranges that require individual evaluation against application requirements.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4620 BK is the primary substitute for the obsolete CLL4620 BK based on electrical parameter equivalence and active product status. Both components share identical zener voltage, power rating, tolerance, impedance, and reverse leakage specifications, establishing functional interchangeability at the electrical level.

Two design considerations require evaluation:

Package Format Change: The transition from SOD-80 (MINI-MELF) to SOD-123 necessitates physical board layout modification. SOD-123 packages are smaller than SOD-80, allowing direct footprint replacement in most applications. Verify PCB land pattern compatibility and thermal management requirements for the specific application.

Operating Temperature Range Reduction: The CMHZ4620 BK operates to 150°C maximum junction temperature, compared to 200°C for the CLL4620 BK. Applications requiring operation above 150°C require evaluation of alternative parts or thermal management modifications.

Forward Voltage Difference: The CMHZ4620 BK specifies 1.5 V forward voltage at 100 mA, compared to 1 V at 200 mA for the CLL4620 BK. This difference reflects measurement conditions rather than fundamental incompatibility and does not affect zener regulation performance in typical applications.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4620 BK directly replace the CLL4620 BK on existing PCBs?

A: Electrical substitution is valid. Physical substitution requires PCB footprint modification due to package format change from SOD-80 to SOD-123. Verify land pattern compatibility with your PCB design before implementation.

Q: What is the primary reason for substituting the CLL4620 BK?

A: The CLL4620 BK is classified as obsolete. The CMHZ4620 BK provides equivalent electrical performance with active product status, ensuring long-term supply availability and manufacturing support.

Q: Are there differences in electrical performance between the CLL4620 BK and CMHZ4620 BK?

A: Core zener specifications are identical: 3.3 V nominal voltage, 500 mW power rating, ±5% tolerance, and 1650 Ohms maximum impedance. The operating temperature range differs (200°C vs. 150°C maximum), and forward voltage measurement conditions differ. These differences do not affect zener regulation in standard applications.

Q: What package types are used for these components?

A: The CLL4620 BK uses SOD-80 (DO-213AC, MINI-MELF) package. The CMHZ4620 BK uses SOD-123 package. Both are surface mount formats with different physical dimensions.

Q: Are there other 3.3 V zener diodes available as alternatives?

A: Yes. Cross-reference alternatives include BZT52C3V3LP-7, BZT52C3V3-HE3-08, BZT52C3V3-7-F, MMSZ5226B-7-F, and MMSZ5226C-E3-08. These parts share the 3.3 V zener specification but may differ in package format, impedance, and temperature range. Individual datasheet review is required for application-specific compatibility.

Q: What compliance certifications apply to these components?

A: Both the CLL4620 BK and CMHZ4620 BK are classified under ECCN EAR99 and HTSUS 8541.10.0050. The CMHZ4620 BK carries REACH Unaffected status. Verify compliance requirements for your specific application and jurisdiction.