CLL4614 TR Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4614 TR is a 1.8 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 production continuity. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance with specified reverse leakage characteristics.

Substiute Parts

CLL4614 TR

Central Semiconductor CorpIn Stock: 1055CLL4614 TR Datasheet

Current PartRFQ

CMHZ4614 TR

Central Semiconductor CorpIn Stock: 869CMHZ4614 TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4614 TR is determined by electrical parameter equivalence and package compatibility. The primary substitute identified is the CMHZ4614 TR, which maintains identical electrical specifications across all critical parameters: 1.8 V nominal zener voltage, ±5% tolerance, 500 mW maximum power dissipation, 1200 Ohms maximum impedance, and 7.5 µA reverse leakage current at 1 V.

The key differentiator between the main part and its substitute is the package format. The CLL4614 TR uses SOD-80 (MINI-MELF) packaging, while the CMHZ4614 TR uses SOD-123 packaging. Both are surface mount configurations with different footprint geometries. The CMHZ4614 TR represents an active product status, providing supply chain continuity for the electrical function.

Secondary cross-reference parts (MMSZ4678-TP, SZMMSZ4678T1G, DDZ9678-7) are listed within the CMHZ4614 TR documentation but require independent verification of electrical and mechanical compatibility outside the scope of this direct substitution analysis.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4614 TR is the direct electrical equivalent to the CLL4614 TR, with all core zener specifications matching precisely. The primary consideration for selection is package footprint compatibility within the target PCB design.

The CLL4614 TR operates to 200°C maximum junction temperature, while the CMHZ4614 TR operates to 150°C maximum. Applications requiring operation above 150°C require retention of the CLL4614 TR or identification of alternative sources. For applications within the 150°C operating window, the CMHZ4614 TR provides active product status and supply chain availability.

The forward voltage specification differs between parts: CLL4614 TR specifies 1 V maximum at 200 mA, while CMHZ4614 TR specifies 1.5 V maximum at 100 mA. These measurements occur at different current levels and do not indicate functional incompatibility for zener regulation applications.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4614 TR directly replace the CLL4614 TR in existing designs?

A: Electrical substitution is valid when the PCB footprint accommodates SOD-123 packaging in place of SOD-80 packaging. The zener voltage, power rating, and impedance specifications are identical. Operating temperature range differs; applications exceeding 150°C require the original CLL4614 TR specification.

Q: What is the primary difference between CLL4614 TR and CMHZ4614 TR?

A: The parts are electrically equivalent 1.8 V, 500 mW zener diodes with identical voltage tolerance and impedance. The CLL4614 TR uses SOD-80 (MINI-MELF) packaging with 200°C maximum operating temperature. The CMHZ4614 TR uses SOD-123 packaging with 150°C maximum operating temperature and active product status.

Q: Are package dimensions interchangeable between SOD-80 and SOD-123?

A: No. SOD-80 and SOD-123 are distinct surface mount packages with different footprint geometries. PCB layout modifications are required when transitioning between these packages. Verify pad spacing and component placement clearances before substitution.

Q: What does "obsolete" product status mean for the CLL4614 TR?

A: Obsolete status indicates the manufacturer has discontinued production. Existing inventory may be available through component distributors, but long-term supply is not guaranteed. The CMHZ4614 TR, with active status, provides ongoing availability for new designs and production continuity.

Q: Are the forward voltage specifications comparable between these parts?

A: The forward voltage specifications are measured at different current levels (CLL4614 TR at 200 mA; CMHZ4614 TR at 100 mA) and are not directly comparable. Both specifications are within normal operating parameters for zener diodes and do not affect substitution validity for voltage regulation applications.

Q: What compliance certifications apply to these parts?

A: Both parts carry ECCN EAR99 classification and HTSUS 8541.10.0050 tariff code. The CMHZ4614 TR includes REACH Unaffected status. Verify current compliance requirements for your specific application and jurisdiction.