CLL4626 TR Equivalent & Substitute Parts

Part Overview

The CLL4626 TR is a Zener diode manufactured by Central Semiconductor Corp, rated at 5.6 V nominal with 500 mW maximum power dissipation in a 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 obsolete status requires substitution planning to ensure supply chain continuity and design compatibility.

Substiute Parts

CLL4626 TR

Central Semiconductor CorpIn Stock: 1051CLL4626 TR Datasheet

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CMHZ4626 TR

Central Semiconductor CorpIn Stock: 768CMHZ4626 TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4626 TR is determined by electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Zener (Nom): 5.6 V
• Tolerance: ±5%
• Power - Max: 500 mW
• Impedance (Max): 1400 Ohms
• Current - Reverse Leakage @ Vr: 10 µA @ 4 V

Mechanical Parameters (Package Compatibility):

• Mounting Type: Surface Mount
• Package compatibility based on PCB layout requirements

The CMHZ4626 TR meets all electrical parameter requirements and maintains surface mount compatibility, though with a different package form factor (SOD-123 versus SOD-80). This substitution is valid where PCB layout accommodates the SOD-123 package footprint.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CMHZ4626 TR

The CMHZ4626 TR is the direct electrical equivalent to the CLL4626 TR, matching all critical zener diode parameters: 5.6 V nominal voltage, ±5% tolerance, 500 mW power rating, 1400 Ohms maximum impedance, and 10 µA reverse leakage current. The CMHZ4626 TR holds active product status, ensuring ongoing availability and supply chain reliability.

Package Consideration:

The CMHZ4626 TR uses SOD-123 packaging instead of the original SOD-80 (MINI-MELF) package. PCB layout modification is required to accommodate the different footprint. The SOD-123 package is a standard surface mount form factor with established manufacturing processes and widespread industry adoption.

Operating Temperature Differential:

The CMHZ4626 TR operates across -65°C to 150°C, compared to the CLL4626 TR 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 Status:

The CMHZ4626 TR carries REACH Unaffected status and EAR99 ECCN classification, consistent with the original part's regulatory framework.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4626 TR directly replace the CLL4626 TR without circuit modification?

A: The CMHZ4626 TR provides electrical equivalence for all zener diode functions. Circuit modification is not required from an electrical standpoint. PCB layout modification is necessary to accommodate the SOD-123 package footprint, which differs from the original SOD-80 package.

Q: What is the primary difference between the CLL4626 TR and CMHZ4626 TR?

A: The primary difference is the package form factor: CLL4626 TR uses SOD-80 (MINI-MELF), while CMHZ4626 TR uses SOD-123. All electrical parameters remain identical. The CMHZ4626 TR also has a reduced maximum operating temperature of 150°C versus 200°C for the original part.

Q: Is the SOD-123 package compatible with existing PCB designs for SOD-80?

A: No. SOD-80 and SOD-123 are distinct surface mount packages with different footprints, pad spacing, and land patterns. PCB redesign is required to accommodate the SOD-123 package.

Q: Why is the CLL4626 TR classified as obsolete?

A: The CLL4626 TR is listed as obsolete by the manufacturer. The CMHZ4626 TR represents the active product line continuation for this electrical specification.

Q: Are there alternative zener diodes with SOD-80 packaging at 5.6 V?

A: The provided substitute list identifies the CMHZ4626 TR as the primary equivalent. Additional cross-reference part numbers are listed: DDZ9690-7, SZMMSZ4690ET3G, MMSZ5232C-HE3-08, DDZ9690T-7, and MMSZ4690-HE3-08. These require independent verification against specific application requirements.

Q: What is the impact of the forward voltage difference between the two parts?

A: The CLL4626 TR specifies 1 V maximum forward voltage at 200 mA, while the CMHZ4626 TR specifies 1.5 V maximum at 100 mA. These measurements are taken at different current levels and do not indicate incompatibility. Forward voltage characteristics are secondary to zener voltage regulation in typical zener diode applications.

Q: Can the CMHZ4626 TR be used in applications requiring operation above 150°C?

A: The CMHZ4626 TR maximum operating temperature is 150°C junction temperature. Applications requiring sustained operation above this temperature require thermal analysis and alternative component selection.