CLL4701 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4701 BK is a 14 V, 500 mW Zener diode manufactured by Central Semiconductor Corp, packaged in SOD-80 (DO-213AC, MINI-MELF) surface mount configuration. 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 compliance.

Substiute Parts

CLL4701 BK

Central Semiconductor CorpIn Stock: 822CLL4701 BK Datasheet

Current PartRFQ

CMHZ4701 BK

Central Semiconductor CorpIn Stock: 1147CMHZ4701 BK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4701 BK is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 14 V nominal
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Reverse leakage current: 50 nA @ 10.6 V
• Forward voltage: 1.5 V @ 100 mA maximum

Mechanical Compatibility Criteria:

• Surface mount configuration required
• Package form factor compatibility with circuit board layout

The CMHZ4701 BK meets all electrical specifications identically to the CLL4701 BK. The primary difference is the package format (SOD-123 versus SOD-80) and operating temperature range. The CMHZ4701 BK operates from -65°C to 150°C, which is narrower than the CLL4701 BK range of -65°C to 200°C. Additionally, the CMHZ4701 BK holds active product status, ensuring ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4701 BK is the direct electrical equivalent to the CLL4701 BK, with identical zener voltage, tolerance, power rating, reverse leakage current, and forward voltage characteristics. The substitute part maintains active product status, ensuring long-term availability and supply chain reliability.

Substitution Considerations:

The primary design consideration is package format compatibility. The CLL4701 BK uses SOD-80 (MINI-MELF) packaging, while the CMHZ4701 BK uses SOD-123 packaging. These packages have different physical dimensions and footprints. Circuit board layout modifications are required to accommodate the SOD-123 package if transitioning from the obsolete CLL4701 BK.

The operating temperature range of the CMHZ4701 BK (-65°C to 150°C) is narrower than the CLL4701 BK (-65°C to 200°C). Applications requiring operation above 150°C junction temperature cannot use the CMHZ4701 BK as a direct substitute.

Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, confirming regulatory equivalence for export and tariff purposes.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4701 BK replace the CLL4701 BK in existing designs?

A: Electrical substitution is valid. The CMHZ4701 BK provides identical zener voltage (14 V), tolerance (±5%), power rating (500 mW), reverse leakage current (50 nA @ 10.6 V), and forward voltage (1.5 V @ 100 mA). However, the package format differs (SOD-123 versus SOD-80), requiring circuit board layout modifications. Verify that the operating temperature requirement does not exceed 150°C junction temperature.

Q: What is the primary difference between CLL4701 BK and CMHZ4701 BK?

A: The parts are electrically identical. The CLL4701 BK uses SOD-80 (MINI-MELF) packaging with an operating temperature range of -65°C to 200°C. The CMHZ4701 BK uses SOD-123 packaging with an operating temperature range of -65°C to 150°C. The CMHZ4701 BK holds active product status, while the CLL4701 BK is obsolete.

Q: Are there package compatibility issues when substituting the CLL4701 BK?

A: Yes. SOD-80 and SOD-123 packages have different physical dimensions and land patterns. Direct footprint substitution is not possible without circuit board redesign. Verify that the SOD-123 package dimensions are compatible with available board space and routing constraints.

Q: Does the narrower operating temperature range of CMHZ4701 BK affect substitution?

A: The CMHZ4701 BK operates from -65°C to 150°C junction temperature, compared to -65°C to 200°C for the CLL4701 BK. If the application requires sustained operation above 150°C junction temperature, the CMHZ4701 BK is not suitable. Verify thermal design and maximum expected junction temperature in the target application.

Q: Are regulatory and compliance classifications identical between the two parts?

A: Yes. Both the CLL4701 BK and CMHZ4701 BK carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, confirming regulatory equivalence for export control and tariff purposes.