CLL4694 BK TIN/LEAD Equivalent & Substitute Parts

Part Overview

The CLL4694 BK TIN/LEAD is a surface mount Zener diode manufactured by Central Semiconductor Corp, rated at 8.2 V nominal Zener voltage with 500 mW maximum power dissipation. The device is packaged in DO-213AC (MINI-MELF, SOD-80) configuration and operates across a temperature range of -65°C to 200°C. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	8.2	V
Tolerance	±5%	%
Power - Max	500	mW
Current - Reverse Leakage @ Vr	1	µA @ 6.2 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 100 mA
Operating Temperature Range	-65°C to 200°C	TJ
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-

Substitute Part Grouping Explanation

Substitution of the CLL4694 BK TIN/LEAD is determined by electrical parameter equivalence and physical compatibility constraints. The critical parameters governing substitution are:

Zener Voltage (Vz): Must match at 8.2 V nominal with ±5% tolerance
Power Rating: Must equal or exceed 500 mW maximum dissipation
Reverse Leakage Current: Must not exceed 1 µA @ 6.2 V
Forward Voltage: Must not exceed 1.5 V @ 100 mA
Mounting Type: Surface mount configuration required
Operating Temperature Range: Must support minimum -65°C to 150°C operation

The CMHZ4694 BK TIN/LEAD qualifies as a substitute based on matching electrical specifications across all critical parameters. However, the operating temperature range differs, with the substitute rated to 150°C maximum versus the original part's 200°C maximum.

Parameter Comparison

Parameter	CLL4694 BK TIN/LEAD	CMHZ4694 BK TIN/LEAD	Match Status
Voltage - Zener (Nom)	8.2 V	8.2 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Current - Reverse Leakage @ Vr	1 µA @ 6.2 V	1 µA @ 6.2 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	1.5 V @ 100 mA	Equivalent
Operating Temperature Range	-65°C to 200°C	-65°C to 150°C	Reduced Upper Limit
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different Package
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The CMHZ4694 BK TIN/LEAD serves as an electrical equivalent to the obsolete CLL4694 BK TIN/LEAD across all core Zener diode specifications. Both devices share identical Zener voltage, power rating, tolerance, reverse leakage characteristics, and forward voltage parameters.

The primary consideration for substitution is the operating temperature range. The CLL4694 operates to 200°C maximum junction temperature, while the CMHZ4694 is rated to 150°C. Applications requiring sustained operation above 150°C junction temperature cannot use the CMHZ4694 as a direct substitute.

The secondary consideration is package configuration. The CLL4694 uses SOD-80 (DO-213AC, MINI-MELF) packaging, while the CMHZ4694 uses SOD-123 packaging. These packages have different physical dimensions and PCB footprints. Board-level redesign is required if the CMHZ4694 is selected as a replacement.

The CMHZ4694 BK TIN/LEAD holds active product status, ensuring ongoing availability and supply chain continuity compared to the obsolete CLL4694.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4694 BK TIN/LEAD directly replace the CLL4694 BK TIN/LEAD without circuit modification?

A: Electrical substitution is valid for applications operating at junction temperatures of 150°C or below. Applications requiring operation above 150°C require the original CLL4694 or an alternative part rated to 200°C. Package differences (SOD-80 versus SOD-123) necessitate PCB layout changes.

Q: What is the impact of the different package types on substitution?

A: SOD-80 and SOD-123 are distinct surface mount packages with different physical dimensions, lead spacing, and PCB footprints. Direct component substitution on existing PCBs is not possible without redesigning the circuit board layout and requalifying the assembly process.

Q: Are the electrical characteristics identical between these two parts?

A: Yes. Zener voltage, power rating, tolerance, reverse leakage current, and forward voltage specifications are identical. The operating temperature range differs, with the CMHZ4694 limited to 150°C maximum junction temperature.

Q: What is the significance of the product status difference?

A: The CLL4694 is classified as obsolete, indicating discontinued manufacturing and limited availability. The CMHZ4694 is active, ensuring continued production, supply availability, and manufacturer support for technical documentation and quality assurance.

Q: Can applications designed for SOD-80 packaging use SOD-123 components?

A: No. SOD-80 and SOD-123 packages have different physical dimensions and PCB footprints. Substitution requires complete redesign of the circuit board layout, re-qualification of assembly processes, and validation of thermal and electrical performance in the new configuration.

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