CLL4619 TR Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4619 TR is a 3 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in SOD-80 (MINI-MELF) surface mount packaging. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance with specified reverse leakage characteristics.

Due to its obsolete status, sourcing alternatives from active product lines is required for procurement continuity and long-term supply chain reliability.

Substiute Parts

CLL4619 TR

Central Semiconductor CorpIn Stock: 969CLL4619 TR Datasheet

Current PartRFQ

CMHZ4619 TR

Central Semiconductor CorpIn Stock: 770CMHZ4619 TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4619 TR is determined by electrical parameter equivalence and mechanical compatibility. The primary substitute identified is the CMHZ4619 TR, which maintains identical electrical specifications across all critical parameters: 3 V nominal Zener voltage, 500 mW maximum power dissipation, ±5% tolerance, 1600 Ohms maximum impedance, and 800 nA reverse leakage current at 1 V.

The key differentiator between the main part and its substitute is the package format. The CLL4619 TR uses SOD-80 (MINI-MELF) packaging, while the CMHZ4619 TR uses SOD-123 packaging. Both are surface mount technologies with equivalent electrical performance. The CMHZ4619 TR operates across a reduced temperature range (-65°C to 150°C) compared to the CLL4619 TR (-65°C to 200°C), and exhibits a higher forward voltage specification (1.5 V @ 100 mA versus 1 V @ 200 mA).

The CMHZ4619 TR holds active product status, ensuring ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4619 TR is the primary substitute for the obsolete CLL4619 TR 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 for circuit design purposes.

Selection of the CMHZ4619 TR requires consideration of two operational constraints:

1. Temperature Range Limitation: The CMHZ4619 TR operates to a maximum junction temperature of 150°C, compared to 200°C for the CLL4619 TR. Applications requiring operation above 150°C junction temperature cannot use this substitute without thermal design modification.

2. Package Footprint Change: The transition from SOD-80 to SOD-123 packaging necessitates PCB layout revision. Both packages are surface mount technologies with different physical dimensions and land patterns. PCB design files and assembly specifications must be updated accordingly.

The CMHZ4619 TR maintains compliance with identical export control (EAR99) and tariff classifications (HTSUS 8541.10.0050), ensuring regulatory continuity. Active product status provides assured long-term availability and supply chain support.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4619 TR directly replace the CLL4619 TR in existing designs?

A: Electrical substitution is valid based on identical Zener voltage, power rating, tolerance, and leakage specifications. However, PCB layout modification is required due to package format change from SOD-80 to SOD-123. Thermal design review is necessary if the application operates above 150°C junction temperature.

Q: What is the primary difference between SOD-80 and SOD-123 packages?

A: SOD-80 (MINI-MELF) and SOD-123 are both surface mount diode packages with different physical dimensions and land patterns. SOD-123 is a smaller package format. PCB footprint, solder pad geometry, and assembly process parameters differ between the two packages.

Q: Does the CMHZ4619 TR meet the same compliance requirements as the CLL4619 TR?

A: Yes. Both components share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, ensuring equivalent export control and tariff treatment.

Q: Why does the CMHZ4619 TR have a lower maximum operating temperature?

A: The CMHZ4619 TR specifies a maximum junction temperature of 150°C, while the CLL4619 TR extends to 200°C. This represents a design difference between the two product lines. Applications requiring sustained operation above 150°C junction temperature require alternative component selection or thermal management modifications.

Q: Are there differences in forward voltage characteristics between these parts?

A: Yes. The CLL4619 TR specifies 1 V maximum forward voltage at 200 mA, while the CMHZ4619 TR specifies 1.5 V maximum forward voltage at 100 mA. These represent different measurement conditions and should be evaluated against specific circuit requirements.

Q: What is the inventory status for the CMHZ4619 TR?

A: The CMHZ4619 TR is an active product with 665 pieces in stock. The CLL4619 TR is obsolete with 885 pieces remaining in inventory.