CLL4685 TR TIN/LEAD Equivalent & Substitute Parts

Part Overview

The CLL4685 TR TIN/LEAD is a Zener diode manufactured by Central Semiconductor Corp, rated at 3.6 V nominal with 500 mW maximum power dissipation. This component is designed for surface mount applications in the SOD-80 (DO-213AC, MINI-MELF) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

CLL4685 TR TIN/LEAD

Central Semiconductor CorpIn Stock: 3169CLL4685 TR TIN/LEAD Datasheet

Current PartRFQ

CMHZ4685 TR TIN/LEAD

Central Semiconductor CorpIn Stock: 1093CMHZ4685 TR TIN/LEAD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4685 TR TIN/LEAD is determined by electrical parameter equivalence and surface mount compatibility. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Zener voltage (Nom): 3.6 V
• Tolerance: ±5%
• Maximum power dissipation: 500 mW
• Reverse leakage current: 7.5 µA @ 2 V
• Forward voltage: 1.5 V @ 100 mA

Mechanical Parameters (Must Be Compatible):

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

The CMHZ4685 TR TIN/LEAD meets all electrical parameter requirements and is compatible as a surface mount substitute, though it utilizes a different package form factor (SOD-123 versus SOD-80). This substitution is valid where PCB layout accommodates the SOD-123 footprint.

Parameter Comparison

Engineering Selection Recommendations

The CMHZ4685 TR TIN/LEAD is the direct electrical equivalent to the CLL4685 TR TIN/LEAD. All critical electrical parameters—zener voltage, tolerance, power rating, reverse leakage, and forward voltage—are identical. The CMHZ4685 maintains active product status, ensuring continued availability and supply chain reliability.

The primary design consideration is package form factor. The CLL4685 uses SOD-80 (MINI-MELF) packaging, while the CMHZ4685 uses SOD-123 packaging. These packages have different footprints and land patterns. Substitution requires PCB layout compatibility with the SOD-123 footprint.

The operating temperature range of the CMHZ4685 extends to 150°C maximum junction temperature, compared to 200°C for the CLL4685. For applications operating above 150°C, the CLL4685 specifications cannot be met by the CMHZ4685 substitute.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4685 directly replace the CLL4685 without circuit modification?

A: The CMHZ4685 is electrically equivalent and will function identically in the circuit. However, the different package form factor (SOD-123 versus SOD-80) requires PCB layout modification. The footprint, land pattern, and component placement differ between these packages.

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

A: SOD-80 (MINI-MELF) and SOD-123 are both surface mount diode packages but have different physical dimensions and land patterns. SOD-123 is smaller and more compact. PCB design files must be updated to accommodate the SOD-123 footprint if substituting the CMHZ4685.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical zener voltage (3.6 V), tolerance (±5%), power rating (500 mW), reverse leakage (7.5 µA @ 2 V), and forward voltage (1.5 V @ 100 mA). The only electrical difference is the maximum operating temperature: CLL4685 operates to 200°C, while CMHZ4685 operates to 150°C.

Q: Is the CMHZ4685 suitable for high-temperature applications?

A: The CMHZ4685 is rated for operation up to 150°C junction temperature. If your application requires operation above 150°C, the CMHZ4685 does not meet the CLL4685 specifications. Alternative parts with higher temperature ratings must be evaluated.

Q: Why is the CLL4685 obsolete?

A: The CLL4685 is classified as obsolete by the manufacturer. The CMHZ4685 is the active equivalent product. For new designs and ongoing production, the CMHZ4685 should be specified to ensure long-term supply availability.

Q: Can I use the CMHZ4685 in existing inventory of CLL4685 applications?

A: Yes, provided the PCB layout can accommodate the SOD-123 package footprint and the application does not require operation above 150°C junction temperature. Electrical performance is identical for all other parameters.