CLL4617 TR Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4617 TR is a 2.4 V Zener diode rated for 500 mW power dissipation in a surface mount SOD-80 (DO-213AC, MINI-MELF) package. Manufactured by Central Semiconductor Corp, this component is classified as obsolete product status. Due to its obsolete designation, locating equivalent or substitute parts with identical or compatible electrical and mechanical specifications is necessary for ongoing design support, production continuity, and component sourcing.

Substiute Parts

CLL4617 TR

Central Semiconductor CorpIn Stock: 754CLL4617 TR Datasheet

Current PartRFQ

CMHZ4617 TR

Central Semiconductor CorpIn Stock: 1199CMHZ4617 TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4617 TR is determined by matching the following critical electrical parameters: nominal Zener voltage (2.4 V), voltage tolerance (±5%), maximum power rating (500 mW), impedance specification (1400 Ohms maximum), reverse leakage current (2 µA @ 1 V), and operating temperature range capability.

The primary substitute identified is the CMHZ4617 TR, which maintains electrical equivalence across all specified parameters. The CMHZ4617 TR differs in package format (SOD-123 versus SOD-80) and operating temperature upper limit (150°C versus 200°C). Forward voltage specification also differs (1.5 V @ 100 mA versus 1 V @ 200 mA), reflecting different measurement conditions rather than functional incompatibility.

Additional cross-reference substitutes listed for the CMHZ4617 TR include MMSZ5221B-TP, BZT52C2V4-E3-18, BZT52B2V4-E3-18, SZMMSZ4681T1G, and DDZ9681Q-7, all of which share the 2.4 V Zener voltage specification and 500 mW power rating.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4617 TR is the primary substitute for the obsolete CLL4617 TR, offering active product status and full electrical equivalence across nominal Zener voltage, tolerance, power rating, impedance, and reverse leakage specifications. The transition from SOD-80 to SOD-123 packaging requires PCB layout modification but does not affect electrical performance.

The reduced operating temperature upper limit of the CMHZ4617 TR (150°C versus 200°C) must be evaluated against application requirements. Designs operating within the -65°C to 150°C range experience no functional limitation. Applications requiring operation above 150°C junction temperature require assessment of alternative 2.4 V Zener diodes with extended temperature ratings.

The CMHZ4617 TR carries active product status, ensuring continued availability and manufacturing support. The CLL4617 TR, classified as obsolete, presents long-term sourcing risk and should be replaced in new designs or production revisions.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4617 TR directly replace the CLL4617 TR without circuit modification?

A: Electrical substitution is valid. The CMHZ4617 TR maintains identical Zener voltage (2.4 V), tolerance (±5%), power rating (500 mW), impedance (1400 Ohms maximum), and reverse leakage current (2 µA @ 1 V). PCB layout modification is required due to package change from SOD-80 to SOD-123. Operating temperature range reduction (150°C versus 200°C) must be verified against application specifications.

Q: What is the primary difference between CLL4617 TR and CMHZ4617 TR?

A: The primary differences are package format (SOD-80 versus SOD-123), product status (obsolete versus active), and operating temperature upper limit (200°C versus 150°C). All critical electrical parameters remain identical.

Q: Are the additional cross-reference parts (MMSZ5221B-TP, BZT52C2V4-E3-18, etc.) direct substitutes?

A: These parts share the 2.4 V Zener voltage and 500 mW power rating. Substitution requires verification of all parameters against specific application requirements, including impedance, reverse leakage, forward voltage, and operating temperature range. These parts are listed as cross-references to the CMHZ4617 TR, not direct equivalents to the CLL4617 TR.

Q: Why is the CLL4617 TR classified as obsolete?

A: Obsolete classification indicates the manufacturer has discontinued production. The CMHZ4617 TR represents the active product line continuation with equivalent electrical specifications.

Q: Does package change from SOD-80 to SOD-123 affect electrical performance?

A: No. Package change affects physical dimensions and PCB footprint only. Electrical performance, including Zener voltage regulation, power dissipation capability, and impedance characteristics, remains unchanged.

Q: What is the operating temperature consideration for substitution?

A: The CLL4617 TR operates from -65°C to 200°C junction temperature. The CMHZ4617 TR operates from -65°C to 150°C. Applications with maximum junction temperatures below 150°C experience no limitation. Applications requiring operation above 150°C require alternative component selection.