CLL4708 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4708 BK is a 22 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in the SOD-80 (DO-213AC, MINI-MELF) surface mount package. 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.

Substiute Parts

CLL4708 BK

Central Semiconductor CorpIn Stock: 789CLL4708 BK Datasheet

Current PartRFQ

CMHZ4708 BK

Central Semiconductor CorpIn Stock: 1101CMHZ4708 BK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4708 BK is determined by electrical parameter equivalence and package compatibility. The primary substitute identified is the CMHZ4708 BK, which maintains identical electrical specifications across all critical parameters: 22 V nominal Zener voltage, 500 mW maximum power dissipation, ±5% tolerance, 10 nA reverse leakage at 16.7 V, and 1.5 V maximum forward voltage at 100 mA. The key differentiator is the package format: the substitute uses SOD-123 instead of SOD-80. This substitution is valid when PCB layout and mechanical constraints accommodate the SOD-123 footprint. The CMHZ4708 BK carries active product status, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4708 BK is the primary substitute for the obsolete CLL4708 BK. Both components are manufactured by Central Semiconductor Corp and share identical electrical specifications for Zener voltage, power rating, tolerance, reverse leakage, and forward voltage characteristics. The substitute carries active product status, ensuring availability for current and future production.

The operating temperature range of the substitute extends to 150°C maximum junction temperature, compared to 200°C for the main part. Applications requiring operation above 150°C require evaluation of thermal management or alternative component selection.

The package transition from SOD-80 to SOD-123 requires PCB layout modification. Both packages are surface mount configurations with different footprint geometries. SOD-123 is a smaller package format, which may provide space optimization benefits in constrained layouts.

Compliance certifications remain consistent: both parts carry EAR99 ECCN classification and 8541.10.0050 HTSUS code. The substitute carries REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4708 BK directly replace the CLL4708 BK without circuit modification?

A: Electrical substitution is valid. The components share identical Zener voltage (22 V), power rating (500 mW), tolerance (±5%), reverse leakage (10 nA @ 16.7 V), and forward voltage (1.5 V @ 100 mA) specifications. PCB layout modification is required due to package format change from SOD-80 to SOD-123.

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

A: The main difference is the package format. The CLL4708 BK uses SOD-80 (DO-213AC, MINI-MELF), while the CMHZ4708 BK uses SOD-123. Electrical performance is equivalent across all specified parameters.

Q: Does the operating temperature range difference affect substitution?

A: The CMHZ4708 BK operates from -65°C to 150°C junction temperature, while the CLL4708 BK extends to 200°C. For applications operating below 150°C, the substitute is fully compatible. Applications requiring operation above 150°C require alternative component selection or thermal management review.

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

A: Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications. The substitute carries REACH Unaffected status. No compliance barriers exist for substitution.

Q: What is the inventory status of the substitute part?

A: The CMHZ4708 BK carries active product status with 1,062 pieces in stock, compared to the obsolete CLL4708 BK with 751 pieces remaining inventory.

Q: Are there other equivalent parts listed for the CMHZ4708 BK?

A: The CMHZ4708 BK documentation references cross-reference parts: SZMMSZ5251ET1G, SZMMSZ4708T1G, MMSZ5251BT1G, DDZ22D-7, and BZT52C22S-7-F. These parts share the 22 V Zener voltage specification and require individual evaluation for package compatibility and electrical parameter alignment.