CLL4615 BK Equivalent & Substitute Parts

Part Overview

The CLL4615 BK is a Zener diode manufactured by Central Semiconductor Corp, rated at 2 V nominal with 500 mW maximum power dissipation in a surface mount SOD-80 package. This component is classified as obsolete, indicating discontinued production and limited availability. Identifying equivalent and substitute parts is necessary to support ongoing design requirements, maintenance operations, and production continuity where the original part is no longer readily procurable through standard distribution channels.

Substiute Parts

CLL4615 BK

Central Semiconductor CorpIn Stock: 805CLL4615 BK Datasheet

Current PartRFQ

CMHZ4615 BK

Central Semiconductor CorpIn Stock: 967CMHZ4615 BK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4615 BK is determined by electrical parameter equivalence and mechanical compatibility. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Zener voltage: 2 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Impedance (Max): 1250 Ohms
• Reverse leakage current: 5 µA @ 1 V

Mechanical Parameters (Must Be Compatible):

• Mounting type: Surface Mount
• Package classification: SOD series (SOD-80, SOD-123)

The CMHZ4615 BK qualifies as a direct electrical substitute, maintaining identical Zener voltage, tolerance, power rating, impedance, and reverse leakage specifications. The primary difference is the package format (SOD-123 versus SOD-80) and operating temperature range, which represents a mechanical and thermal variation rather than an electrical incompatibility. The forward voltage specification differs (1.5 V @ 100 mA versus 1 V @ 200 mA), reflecting different measurement conditions rather than functional divergence.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4615 BK is the primary substitute for the obsolete CLL4615 BK. Both components are manufactured by Central Semiconductor Corp and maintain identical electrical specifications for Zener voltage, tolerance, power dissipation, impedance, and reverse leakage current.

Product Status Consideration: The CMHZ4615 BK carries an Active product status, ensuring continued availability and manufacturing support, whereas the CLL4615 BK is classified as Obsolete. This distinction is critical for long-term supply chain reliability and component procurement planning.

Package Compatibility: The substitution involves a package transition from SOD-80 to SOD-123. Both are surface mount packages within the SOD (Small Outline Diode) family. PCB layout modifications are required to accommodate the different footprint dimensions. SOD-123 is a more widely standardized package format in current manufacturing environments.

Operating Temperature Range: The CMHZ4615 BK operates across -65°C to 150°C, compared to the CLL4615 BK range of -65°C to 200°C. Applications requiring operation above 150°C junction temperature require evaluation against the reduced upper thermal limit.

Compliance and Certifications: Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications. The CMHZ4615 BK includes REACH Unaffected status, confirming regulatory compliance under current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4615 BK directly replace the CLL4615 BK in existing designs?

A: Electrical substitution is direct. The Zener voltage, tolerance, power rating, impedance, and reverse leakage specifications are identical. However, the package change from SOD-80 to SOD-123 requires PCB footprint modification. Verify that the reduced operating temperature range (-65°C to 150°C versus -65°C to 200°C) is acceptable for your application.

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

A: Both are surface mount Small Outline Diode packages. SOD-80 (MINI-MELF) and SOD-123 have different physical dimensions and PCB footprints. SOD-123 is more prevalent in modern manufacturing. Consult package datasheets for exact dimensional specifications before PCB redesign.

Q: Are there electrical differences between the forward voltage specifications?

A: The forward voltage is specified under different measurement conditions: CLL4615 BK at 1 V @ 200 mA versus CMHZ4615 BK at 1.5 V @ 100 mA. These represent different test points on the forward characteristic curve and do not indicate functional incompatibility. Both specifications are within normal Zener diode behavior.

Q: Why is the CLL4615 BK classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CMHZ4615 BK, with Active status, represents the current production equivalent and is the recommended path for new designs and ongoing procurement.

Q: What compliance certifications apply to these parts?

A: Both the CLL4615 BK and CMHZ4615 BK carry EAR99 export classification and HTSUS code 8541.10.0050. The CMHZ4615 BK additionally carries REACH Unaffected status, confirming compliance with current environmental regulations.

Q: Can the CMHZ4615 BK be used in applications requiring operation above 150°C?

A: No. The CMHZ4615 BK maximum operating temperature is 150°C junction temperature. Applications requiring sustained operation above this threshold require alternative components rated for higher temperatures. Consult the substitute part list for other options.