CLL5229D BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL5229D BK is a 4.3 V Zener diode rated at 500 mW, manufactured by Central Semiconductor Corp in a surface mount SOD-80 package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement. The part operates across a temperature range of -65°C to 200°C and features ±1% voltage tolerance with a maximum impedance of 22 Ohms.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.3	V
Tolerance	±1%	—
Power - Max	500	mW
Impedance (Max)	22	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.25	V @ 200 mA
Operating Temperature	-65 to 200	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the CLL5229D BK is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 4.3 V nominal
Power dissipation: 500 mW maximum
Package type: Surface mount SOD-80 (DO-213AC, MINI-MELF)
Operating temperature range: -65°C to 200°C

Secondary Compatibility Factors:

Voltage tolerance (±1% to ±2% acceptable)
Impedance characteristics (22 Ohms to 90 Ohms)
Reverse leakage current (3 µA to 5 µA @ 1 V)
Forward voltage drop (900 mV to 1.25 V)

The BZV55-B4V3,115 manufactured by NXP USA Inc. meets all primary matching criteria and operates within acceptable secondary parameter ranges for direct substitution.

Parameter Comparison

Parameter	CLL5229D BK (Central Semiconductor)	BZV55-B4V3,115 (NXP USA Inc.)	Compatibility
Voltage - Zener (Nom)	4.3 V	4.3 V	Identical
Tolerance	±1%	±2%	Compatible
Power - Max	500 mW	500 mW	Identical
Impedance (Max)	22 Ohms	90 Ohms	Compatible
Current - Reverse Leakage @ Vr	5 µA @ 1 V	3 µA @ 1 V	Compatible
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	900 mV @ 10 mA	Compatible
Operating Temperature	-65°C to 200°C	-65°C to 200°C	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	Identical
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

The BZV55-B4V3,115 is the qualified substitute for the obsolete CLL5229D BK based on the following factors:

Electrical Equivalence: Both devices maintain identical nominal Zener voltage (4.3 V) and maximum power dissipation (500 mW). The BZV55-B4V3,115 operates within acceptable tolerance and impedance ranges for applications requiring the CLL5229D BK.

Package Compatibility: Both components use identical surface mount packaging (DO-213AC, MINI-MELF, SOD-80), ensuring direct PCB footprint compatibility without layout modifications.

Temperature Performance: Identical operating temperature range (-65°C to 200°C) ensures thermal performance equivalence across all specified operating conditions.

Product Status: The BZV55-B4V3,115 maintains active product status with established supply chain availability (30,400 pieces in stock), addressing the obsolescence of the original CLL5229D BK.

Compliance: Both components carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, maintaining regulatory compliance for procurement and export.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B4V3,115 be used as a direct replacement for the CLL5229D BK?

A: Yes. Both devices share identical nominal Zener voltage (4.3 V), power rating (500 mW), operating temperature range (-65°C to 200°C), and surface mount SOD-80 packaging. The BZV55-B4V3,115 operates within acceptable parameter ranges for direct substitution without circuit redesign.

Q: What is the difference in voltage tolerance between these parts?

A: The CLL5229D BK specifies ±1% tolerance, while the BZV55-B4V3,115 specifies ±2% tolerance. This difference is acceptable for most applications where the 4.3 V Zener voltage is used for voltage regulation or protection. Circuit designers should verify tolerance requirements for precision applications.

Q: Are the packages physically identical?

A: Yes. Both the CLL5229D BK and BZV55-B4V3,115 use the DO-213AC (MINI-MELF, SOD-80) surface mount package. No PCB layout modifications are required for substitution.

Q: What is the impedance difference, and does it affect circuit performance?

A: The CLL5229D BK specifies 22 Ohms maximum impedance, while the BZV55-B4V3,115 specifies 90 Ohms maximum impedance. Higher impedance results in slightly increased dynamic resistance. For most voltage regulation and protection applications, this difference is negligible. Applications requiring precise dynamic response should evaluate circuit performance with the higher impedance value.

Q: Why is the CLL5229D BK obsolete?

A: The CLL5229D BK is classified as obsolete by the manufacturer. The BZV55-B4V3,115 is an active product from NXP USA Inc. with established supply chain support, making it the recommended substitute for ongoing designs and procurement.

Q: Are there any compliance or certification differences?

A: No. Both components carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, ensuring equivalent regulatory compliance for procurement, storage, and export.

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