CLL5221B TR Equivalent & Substitute Parts

Part Overview

The CLL5221B TR is a Zener diode rated at 2.4 V nominal with 500 mW power dissipation, manufactured by Central Semiconductor Corp in SOD-80 surface mount packaging. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The obsolete status requires substitution with functionally equivalent active components to ensure supply chain continuity and design viability.

Substiute Parts

CLL5221B TR

Central Semiconductor CorpIn Stock: 936CLL5221B TR Datasheet

Current PartRFQ

CMHZ5221B TR

Central Semiconductor CorpIn Stock: 773CMHZ5221B TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL5221B TR is based on electrical parameter equivalence across the following criteria:

Electrical Matching Parameters:

• Zener voltage (Vz): 2.4 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Maximum impedance (Zzt): 30 Ohms
• Reverse leakage current: 100 µA @ 1 V
• Mounting type: Surface Mount

The CMHZ5221B TR meets all core electrical specifications. Package differences (SOD-123 versus SOD-80) represent the primary physical distinction and must be evaluated within the context of circuit board layout and thermal management requirements.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ5221B TR is an active equivalent substitute for the obsolete CLL5221B TR. Both components are manufactured by Central Semiconductor Corp and share identical electrical specifications for Zener voltage, tolerance, power rating, impedance, and reverse leakage characteristics.

Product Status Consideration: The CMHZ5221B TR maintains active product status, ensuring ongoing availability and manufacturing support. The CLL5221B TR obsolete classification eliminates it as a viable option for new designs and long-term production planning.

Compliance and Certification: Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications. The CMHZ5221B TR includes REACH Unaffected status, confirming regulatory compliance for European markets.

Package Transition: The primary design consideration involves the package change from SOD-80 to SOD-123. This transition requires verification of printed circuit board layout compatibility, including land pattern dimensions, thermal dissipation pathways, and component spacing constraints specific to the application circuit.

Frequently Asked Questions (FAQ)

Q: Are the electrical specifications identical between CLL5221B TR and CMHZ5221B TR?

A: Yes. Both components share identical Zener voltage (2.4 V), tolerance (±5%), power rating (500 mW), impedance (30 Ohms maximum), and reverse leakage current (100 µA @ 1 V) specifications.

Q: What is the primary difference between these two parts?

A: The package format differs. The CLL5221B TR uses SOD-80 (DO-213AC, MINI-MELF) packaging, while the CMHZ5221B TR uses SOD-123 packaging. Both are surface mount configurations.

Q: Can CMHZ5221B TR be used as a direct replacement in existing designs?

A: Electrical substitution is valid. Physical substitution requires verification that the SOD-123 package footprint is compatible with the existing printed circuit board layout and thermal management design.

Q: Why is the CLL5221B TR classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CMHZ5221B TR represents the active equivalent in the Central Semiconductor Corp product line.

Q: Are there regulatory or compliance differences between these parts?

A: Both parts share the same ECCN and HTSUS classifications. The CMHZ5221B TR includes REACH Unaffected certification, confirming compliance with European Union regulations.

Q: What thermal operating range does each part support?

A: The CLL5221B TR operates from −65°C to 200°C (TJ). The CMHZ5221B TR operates to 150°C (TJ). Applications requiring operation above 150°C require the CLL5221B TR specification, though this part is obsolete.