CLL4104 TR Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4104 TR is a 10 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in SOD-80 (DO-213AC, MINI-MELF) surface mount packaging. This component is classified as obsolete, indicating discontinued production and limited availability for new designs. Identification of equivalent and substitute parts is necessary to maintain supply chain continuity, support existing inventory management, and enable design flexibility for applications requiring 10 V Zener regulation in surface mount form factors.

Substiute Parts

CLL4104 TR

Central Semiconductor CorpIn Stock: 782CLL4104 TR Datasheet

Current PartRFQ

CMHZ4104 TR

Central Semiconductor CorpIn Stock: 1216CMHZ4104 TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4104 TR is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Zener voltage: 10 V nominal with ±5% tolerance
• Power dissipation rating: 500 mW maximum
• Impedance: 200 Ohms maximum
• Reverse leakage current: 1 µA @ 7.6 V
• Surface mount configuration
• Operating temperature range compatibility

Secondary Consideration:

• Package form factor (SOD-80 vs. SOD-123) represents a mechanical variation that affects board layout and thermal management but does not alter electrical performance within specified parameters.

The CMHZ4104 TR qualifies as a direct electrical equivalent with identical Zener voltage, tolerance, power rating, impedance, and reverse leakage specifications. The primary distinction is packaging format (SOD-123 vs. SOD-80) and active product status, which provides supply chain advantages.

Parameter Comparison

Engineering Selection Recommendations

CMHZ4104 TR as Primary Substitute:

The CMHZ4104 TR provides electrical equivalence to the CLL4104 TR across all critical Zener specifications: 10 V nominal voltage, ±5% tolerance, 500 mW power rating, 200 Ohms maximum impedance, and 1 µA reverse leakage current. The component holds active product status, ensuring ongoing availability and supply chain reliability compared to the obsolete CLL4104 TR.

Operational Considerations:

The CMHZ4104 TR operates within a reduced maximum junction temperature range (-65°C to 150°C) relative to the CLL4104 TR (-65°C to 200°C). Applications requiring sustained operation above 150°C junction temperature require thermal analysis to confirm the CMHZ4104 TR remains within acceptable operating limits.

Forward voltage specification differs between parts (1 V @ 200 mA for CLL4104 TR versus 1.5 V @ 100 mA for CMHZ4104 TR). This variation reflects measurement conditions rather than fundamental device behavior and does not affect Zener regulation performance in typical voltage reference applications.

Package Transition:

Migration from SOD-80 to SOD-123 packaging requires board layout modification. SOD-123 represents a smaller form factor with different lead geometry and thermal characteristics. Thermal management and PCB routing must be re-evaluated for applications with stringent thermal or spatial constraints.

Compliance Status:

Both components carry EAR99 export classification and HTSUS code 8541.10.0050. The CMHZ4104 TR includes REACH Unaffected designation, confirming compliance with European chemical substance regulations.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4104 TR directly replace the CLL4104 TR in existing designs?

A: Electrical substitution is valid for applications where the operating junction temperature does not exceed 150°C and board layout accommodates SOD-123 packaging. PCB redesign is required to transition from SOD-80 to SOD-123 form factor.

Q: What is the significance of the different forward voltage specifications?

A: Forward voltage is measured under different current conditions (200 mA vs. 100 mA) and does not affect Zener regulation performance. The 10 V Zener voltage and impedance specifications determine voltage reference accuracy in typical applications.

Q: Why is the CLL4104 TR classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CMHZ4104 TR represents the active equivalent, ensuring continued component availability for new and existing applications.

Q: Are there thermal management differences between SOD-80 and SOD-123 packages?

A: SOD-123 is a smaller package with reduced thermal mass compared to SOD-80 (MINI-MELF). Thermal dissipation characteristics differ; applications operating near the 500 mW power limit require thermal analysis to confirm adequate heat transfer in the SOD-123 form factor.

Q: What compliance certifications apply to both parts?

A: Both CLL4104 TR and CMHZ4104 TR carry EAR99 export classification and HTSUS code 8541.10.0050. The CMHZ4104 TR includes REACH Unaffected status, confirming compliance with European chemical substance regulations applicable to the active product.

Q: Can the CLL4104 TR be used in applications requiring operation above 150°C junction temperature?

A: Yes. The CLL4104 TR supports junction temperatures to 200°C, exceeding the CMHZ4104 TR maximum of 150°C. Applications with sustained high-temperature operation must retain the CLL4104 TR or identify alternative components rated for the required temperature range.