CLL4704 TR Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4704 TR is a 17 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in SOD-80 (DO-213AC, MINI-MELF) surface mount packaging. 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

CLL4704 TR

Central Semiconductor CorpIn Stock: 923CLL4704 TR Datasheet

Current PartRFQ

CMHZ4704 TR

Central Semiconductor CorpIn Stock: 1016CMHZ4704 TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete CLL4704 TR is determined by electrical parameter equivalence and package compatibility. The primary substitute identified is the CMHZ4704 TR, which maintains identical electrical specifications across all critical parameters: 17 V nominal Zener voltage, 500 mW maximum power dissipation, ±5% tolerance, 50 nA reverse leakage at 12.9 V, and 1.5 V maximum forward voltage at 100 mA.

The key differentiator between the main part and its substitute is the package format. The CLL4704 TR uses SOD-80 (MINI-MELF) packaging, while the CMHZ4704 TR uses SOD-123 packaging. Both are surface mount configurations suitable for automated assembly. The CMHZ4704 TR operates across -65°C to 150°C, which represents a reduced upper temperature limit compared to the CLL4704 TR's -65°C to 200°C range.

Substitution eligibility is based on:

• Zener voltage matching (17 V nominal)
• Power rating equivalence (500 mW)
• Voltage tolerance alignment (±5%)
• Reverse leakage specification compliance (50 nA @ 12.9 V)
• Forward voltage characteristics (1.5 V @ 100 mA)
• Surface mount technology compatibility
• Active product status for ongoing availability

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4704 TR is the direct electrical equivalent to the obsolete CLL4704 TR, with all critical electrical parameters matching specification. The substitute part carries active product status, ensuring long-term availability and supply chain continuity.

Selection of the CMHZ4704 TR requires verification of PCB layout compatibility with SOD-123 packaging in place of the original SOD-80 footprint. Both packages are surface mount configurations with different physical dimensions and land patterns. The reduced operating temperature maximum of 150°C (versus 200°C for the original) must be evaluated against application thermal requirements.

Both parts share identical export classification (EAR99) and tariff codes (8541.10.0050), maintaining regulatory compliance across substitution. The CMHZ4704 TR carries REACH Unaffected status, confirming compliance with European chemical regulations.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4704 TR directly replace the CLL4704 TR in existing designs?

A: Electrical substitution is valid. The CMHZ4704 TR matches all electrical specifications of the CLL4704 TR. PCB layout modification is required due to package format differences (SOD-80 to SOD-123). Thermal design review is necessary if the application operates above 150°C.

Q: What is the primary difference between CLL4704 TR and CMHZ4704 TR?

A: The parts are electrically identical at 17 V, 500 mW with ±5% tolerance. The CLL4704 TR uses SOD-80 (MINI-MELF) packaging with -65°C to 200°C operating range. The CMHZ4704 TR uses SOD-123 packaging with -65°C to 150°C operating range.

Q: Are there physical footprint compatibility issues between SOD-80 and SOD-123 packages?

A: Yes. SOD-80 and SOD-123 are distinct surface mount packages with different dimensions and land patterns. PCB redesign is required for package substitution.

Q: Does the reduced temperature range of the CMHZ4704 TR affect suitability?

A: The CMHZ4704 TR operates to 150°C maximum junction temperature, compared to 200°C for the CLL4704 TR. Applications requiring operation above 150°C require thermal analysis to confirm the substitute part remains within specification.

Q: What compliance certifications apply to both parts?

A: Both the CLL4704 TR and CMHZ4704 TR carry EAR99 export classification and 8541.10.0050 tariff code. The CMHZ4704 TR is REACH Unaffected.

Q: Why is the CLL4704 TR classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured. The CMHZ4704 TR provides electrical equivalence with active product status for continued availability.