CLL4627 BK TIN/LEAD Equivalent & Substitute Parts

Part Overview

The CLL4627 BK TIN/LEAD is a surface mount Zener diode manufactured by Central Semiconductor Corp, rated at 6.2 V nominal with 500 mW maximum power dissipation and ±5% tolerance. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support, maintenance, and production continuity. The part is packaged in DO-213AC (MINI-MELF, SOD-80) surface mount configuration and operates across a temperature range of -65°C to 200°C.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.2	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	1200	Ohms
Current - Reverse Leakage @ Vr	10	µA @ 5 V
Voltage - Forward (Vf) (Max) @ If	1	V @ 200 mA
Operating Temperature Range	-65 to 200	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—

Substitute Part Grouping Explanation

Substitution of the obsolete CLL4627 BK TIN/LEAD is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Zener voltage (Vz): 6.2 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Impedance (Zzt): 1200 Ohms maximum
Reverse leakage current: 10 µA @ 5 V

Mechanical Matching Criteria:

Mounting type: Surface Mount
Package compatibility: SOD-80 or equivalent surface mount packages

The CMHZ4627 BK TIN/LEAD meets all electrical specifications and operates as a direct functional equivalent. However, the package format differs (SOD-123 versus SOD-80), which requires PCB layout evaluation for mechanical compatibility.

Parameter Comparison

Parameter	CLL4627 BK TIN/LEAD	CMHZ4627 BK TIN/LEAD	Match Status
Voltage - Zener (Nom)	6.2 V	6.2 V	Matched
Tolerance	±5%	±5%	Matched
Power - Max	500 mW	500 mW	Matched
Impedance (Max)	1200 Ohms	1200 Ohms	Matched
Current - Reverse Leakage @ Vr	10 µA @ 5 V	10 µA @ 5 V	Matched
Voltage - Forward (Vf) (Max) @ If	1 V @ 200 mA	1.5 V @ 100 mA	Different
Operating Temperature Range	-65°C to 200°C	-65°C to 150°C	Partial Match
Mounting Type	Surface Mount	Surface Mount	Matched
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

CMHZ4627 BK TIN/LEAD as Primary Substitute:

The CMHZ4627 BK TIN/LEAD is the active equivalent for the obsolete CLL4627 BK TIN/LEAD. Both components share identical electrical specifications for Zener voltage, tolerance, power rating, impedance, and reverse leakage characteristics. The CMHZ4627 maintains active product status with current manufacturing availability (971 Pcs in stock).

Considerations for Implementation:

Package Format Transition: The substitute uses SOD-123 packaging instead of SOD-80 (MINI-MELF). PCB footprint modification is required. Both are surface mount configurations with different dimensional envelopes.
Operating Temperature Range: The CLL4627 operates to 200°C junction temperature, while the CMHZ4627 operates to 150°C. Applications requiring operation above 150°C require thermal analysis to confirm the substitute is suitable.
Forward Voltage Characteristics: The CMHZ4627 specifies 1.5 V @ 100 mA forward voltage compared to 1 V @ 200 mA for the original. This difference reflects different measurement conditions and does not affect Zener regulation performance.
Compliance Status: The CMHZ4627 carries REACH Unaffected status, providing regulatory clarity for new designs. The original CLL4627 is RoHS non-compliant due to its obsolete status.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4627 BK TIN/LEAD directly replace the CLL4627 BK TIN/LEAD without PCB modification?

A: Electrical substitution is direct. Mechanical substitution requires PCB layout evaluation due to package format differences (SOD-123 versus SOD-80). Footprint redesign may be necessary.

Q: Are the Zener voltage and tolerance specifications identical between these parts?

A: Yes. Both components are rated at 6.2 V nominal with ±5% tolerance, ensuring equivalent voltage regulation performance.

Q: What is the impact of the different operating temperature ranges?

A: The CLL4627 operates to 200°C junction temperature, while the CMHZ4627 operates to 150°C. Applications operating above 150°C require thermal verification to confirm the substitute meets performance requirements.

Q: Do the forward voltage differences affect circuit performance?

A: Forward voltage specifications are measured at different current levels (1 V @ 200 mA versus 1.5 V @ 100 mA). These differences reflect measurement conditions and do not affect Zener diode regulation characteristics in typical applications.

Q: Is the CMHZ4627 available for immediate procurement?

A: Yes. The CMHZ4627 BK TIN/LEAD is active product status with 971 pieces in current inventory.

Q: What compliance certifications apply to the substitute part?

A: The CMHZ4627 BK TIN/LEAD carries REACH Unaffected status. Both parts share the same ECCN (EAR99) and HTSUS (8541.10.0050) classifications.

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