CLL4703 BK Equivalent & Substitute Zener Diodes Reference

Part Overview

The CLL4703 BK is a Central Semiconductor 16 V, 500 mW, ±5% tolerance Zener diode in a SOD-80 (DO-213AC, MINI-MELF) surface mount package. This part is classified as obsolete, increasing the importance of identifying substitute diodes with matching electrical and physical parameters for continued engineering support, maintenance, or production.

Key Parameters

Parameter	Main Part (CLL4703 BK)
Voltage - Zener (Nom) (Vz)	16 V
Tolerance	±5%
Power - Max	500 mW
Current - Reverse Leakage @ Vr	50 nA @ 12.1 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA
Operating Temperature	-65°C ~ 200°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80
Supplier Device Package	SOD-80

Substitute Part Grouping Explanation

Substitute Zener diodes are identified by directly matching the following parameters: Nominal Zener voltage, tolerance, maximum power dissipation, reverse leakage, forward voltage, operating temperature range, package type, and mounting method. The substitute parts must fall within the specified limits for these parameters to ensure electrical and mechanical compatibility as required for the Diodes, Zener category.

Parameter Comparison

Parameter	CLL4703 BK	CMHZ4703 BK
Manufacturer	Central Semiconductor Corp	Central Semiconductor Corp
Category	Diodes, Zener	Diodes, Zener
Description	DIODE ZENNER 16V 500MW SOD-80	DIODE ZENNER 16V 500MW SOD-123
Voltage - Zener (Nom) (Vz)	16 V	16 V
Tolerance	±5%	±5%
Power - Max	500 mW	500 mW
Current - Reverse Leakage @ Vr	50 nA @ 12.1 V	50 nA @ 12.1 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	1.5 V @ 100 mA
Operating Temperature	-65°C ~ 200°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123
Supplier Device Package	SOD-80	SOD-123
Product Status	Obsolete	Active
Compliance (REACH Status)	-	REACH Unaffected

Engineering Selection Recommendations

CLL4703 BK is no longer in production (Obsolete) while CMHZ4703 BK is currently active. CMHZ4703 BK features REACH Unaffected compliance. Both parts share matching nominal Zener voltage, power rating, tolerance, reverse leakage, forward voltage, and mounting type. However, differences exist in maximum rated junction temperature and physical package type, which should align with specific PCB footprints and mechanical requirements of the application.

Frequently Asked Questions (FAQ)

Q: What are the main parameters when selecting a substitute for CLL4703 BK in the Diodes, Zener category?
A: The main parameters are nominal Zener voltage, tolerance, maximum power dissipation, reverse leakage current, forward voltage at test current, operating temperature range, surface mount compatibility, and matching package or compatible footprint.

Q: How does the package type affect direct substitution?
A: Package differences (SOD-80 vs SOD-123) must be checked for mechanical compatibility. Although both are surface-mount, the footprints and dimensions differ.

Q: Is the maximum junction temperature significant when substituting?
A: Yes. The CLL4703 BK operates up to 200°C (TJ), while CMHZ4703 BK is rated to 150°C (TJ). Applications must not require operation above the substitute’s maximum junction temperature.

Q: Are there differences in compliance or active status?
A: The substitute CMHZ4703 BK is REACH Unaffected and is actively available, whereas the CLL4703 BK is obsolete.

Q: Can all SOD-80 Zener diodes be replaced with SOD-123 equivalents?
A: Only if the electrical parameters and physical PCB requirements are matched exactly as outlined. Footprint and height considerations must be validated for the specific application constraints.

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