CLL4614 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4614 BK is a 1.8 V Zener diode rated for 500 mW power dissipation in a surface mount SOD-80 (DO-213AC, MINI-MELF) package. This component is classified as obsolete, indicating discontinued production and limited availability for new designs. Identification of equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this Zener diode specification.

Substiute Parts

CLL4614 BK

Central Semiconductor CorpIn Stock: 989CLL4614 BK Datasheet

Current PartRFQ

CMHZ4614 BK

Central Semiconductor CorpIn Stock: 836CMHZ4614 BK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL4614 BK is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Zener voltage (Vz) of 1.8 V nominal
• Tolerance of ±5%
• Maximum power rating of 500 mW
• Maximum impedance (Zzt) of 1200 Ohms
• Reverse leakage current of 7.5 µA @ 1 V

Mechanical Compatibility Criteria:

• Surface mount technology
• Package compatibility with circuit board layout and thermal management requirements

The substitute part CMHZ4614 BK meets all electrical specifications. However, the package differs from the original SOD-80 specification, requiring mechanical and thermal evaluation for board-level integration.

Parameter Comparison

Engineering Selection Recommendations

CMHZ4614 BK Substitution Considerations:

The CMHZ4614 BK maintains electrical equivalence for core Zener specifications (voltage, tolerance, power rating, impedance, and reverse leakage). This part is classified as active product status, ensuring ongoing availability and supply chain support.

Differences Requiring Evaluation:

1. Package Change (SOD-80 to SOD-123): Physical dimensions and footprint differ. Circuit board layout modification is required. Thermal characteristics may differ due to package geometry variations.

2. Operating Temperature Range: The substitute part operates to 150°C maximum junction temperature, compared to 200°C for the original. Applications requiring operation above 150°C require alternative solutions.

3. Forward Voltage Characteristics: Forward voltage specification differs (1.5 V @ 100 mA versus 1 V @ 200 mA). This affects forward conduction behavior in reverse-biased applications and must be evaluated against circuit requirements.

Compliance Status:

Both parts carry ECCN EAR99 classification and HTSUS code 8541.10.0050. The substitute part is REACH Unaffected, confirming regulatory compliance for European markets.

Frequently Asked Questions (FAQ)

Q: Can CMHZ4614 BK directly replace CLL4614 BK without circuit board modification?

A: No. The package change from SOD-80 to SOD-123 requires circuit board layout modification. Footprint, pad spacing, and component placement differ between these packages. Board redesign is necessary.

Q: Are the electrical specifications identical between these parts?

A: Core Zener specifications are identical: 1.8 V nominal voltage, ±5% tolerance, 500 mW power rating, 1200 Ohms maximum impedance, and 7.5 µA reverse leakage current. Forward voltage characteristics and maximum operating temperature differ.

Q: What is the significance of the product status change from Obsolete to Active?

A: Active product status indicates ongoing manufacture and availability. This ensures long-term supply chain support and reduces risk of future obsolescence for new designs or production continuity.

Q: Does the operating temperature range difference affect my application?

A: This depends on your circuit's maximum junction temperature requirement. If your application requires operation above 150°C, the CMHZ4614 BK is not suitable. If operation remains below 150°C, this difference does not impact functionality.

Q: How do the forward voltage differences impact circuit behavior?

A: Forward voltage specifications apply to forward-biased operation. In typical Zener diode applications (reverse-biased voltage regulation), forward voltage characteristics have minimal impact. However, applications utilizing forward conduction must evaluate the 1.5 V @ 100 mA specification against circuit requirements.

Q: What other substitute parts are cross-referenced with CMHZ4614 BK?

A: The CMHZ4614 BK documentation references MMSZ4678-TP, SZMMSZ4678T1G, and DDZ9678-7 as additional substitutes. These parts require independent evaluation against your specific electrical and mechanical requirements.