CLL4715 BK TIN/LEAD Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4715 BK TIN/LEAD is a 36 V, 500 mW surface mount zener diode manufactured by Central Semiconductor Corp in the DO-213AC (MINI-MELF, SOD-80) package. This component is classified as obsolete, indicating discontinued production and limited availability in the market. Identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and new design requirements where this diode specification remains functionally applicable.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	36	V
Tolerance	±5	%
Power - Maximum	500	mW
Current - Reverse Leakage @ Vr	10 nA @ 27.3 V	nA
Voltage - Forward (Max) @ If	1.5 V @ 100 mA	V
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 CLL4715 BK TIN/LEAD is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Zener voltage (Vz) of 36 V nominal
Tolerance of ±5%
Maximum power dissipation of 500 mW
Reverse leakage current of 10 nA @ 27.3 V
Forward voltage (Vf) of 1.5 V maximum @ 100 mA

Mechanical Compatibility Criteria:

Surface mount mounting type
Package compatibility with circuit board layout and thermal requirements

The CMHZ4715 BK TIN/LEAD meets all electrical parameters identically. Package differences (SOD-123 versus SOD-80) represent the primary mechanical distinction and require board-level layout verification for physical fit and thermal performance.

Parameter Comparison

Parameter	CLL4715 BK TIN/LEAD	CMHZ4715 BK TIN/LEAD	Match Status
Manufacturer	Central Semiconductor Corp	Central Semiconductor Corp	Identical
Category	Diodes, Zener	Diodes, Zener	Identical
Voltage - Zener (Nom)	36 V	36 V	Identical
Tolerance	±5%	±5%	Identical
Power - Max	500 mW	500 mW	Identical
Current - Reverse Leakage @ Vr	10 nA @ 27.3 V	10 nA @ 27.3 V	Identical
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	1.5 V @ 100 mA	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature Range	-65°C ~ 200°C (TJ)	-65°C ~ 150°C (TJ)	Partial Match
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different
Product Status	Obsolete	Active	Different

Engineering Selection Recommendations

CLL4715 BK TIN/LEAD (Original Part):

Product status: Obsolete
RoHS compliance: Non-compliant
Current availability: 2,275 pieces in stock
Selection basis: Use only when existing inventory is available and RoHS non-compliance is acceptable for the application

CMHZ4715 BK TIN/LEAD (Substitute Part):

Product status: Active
REACH status: Unaffected
Current availability: 992 pieces in stock
Selection basis: Preferred for new designs and applications requiring active product support

Critical Considerations:

The CMHZ4715 BK TIN/LEAD provides electrical equivalence with identical zener voltage, tolerance, power rating, and leakage characteristics. The operating temperature range of the substitute part extends to 150°C (TJ) versus 200°C (TJ) for the original part. Applications requiring operation above 150°C (TJ) must retain the CLL4715 BK TIN/LEAD or identify alternative parts with higher temperature ratings.

Package transition from SOD-80 to SOD-123 requires physical board layout verification. Both packages are surface mount configurations with different footprints and thermal characteristics. PCB design changes may be necessary to accommodate the SOD-123 package.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4715 BK TIN/LEAD directly replace the CLL4715 BK TIN/LEAD in existing designs?

A: Electrical substitution is valid based on identical zener voltage, tolerance, power rating, and leakage specifications. Physical substitution requires verification of PCB footprint compatibility between SOD-80 and SOD-123 packages. Thermal performance must be evaluated for the specific application.

Q: What is the difference between SOD-80 and SOD-123 packages?

A: SOD-80 (MINI-MELF) and SOD-123 are distinct surface mount package outlines with different physical dimensions and thermal characteristics. SOD-123 is a smaller package. Board layout and thermal design must accommodate the selected package type.

Q: Does the operating temperature difference affect substitution suitability?

A: The CLL4715 BK TIN/LEAD operates to 200°C (TJ), while the CMHZ4715 BK TIN/LEAD operates to 150°C (TJ). Applications requiring junction temperatures above 150°C must use the original part or identify alternatives with equivalent high-temperature ratings.

Q: Is the CMHZ4715 BK TIN/LEAD suitable for new product designs?

A: Yes. The CMHZ4715 BK TIN/LEAD is active product status with REACH compliance, making it suitable for new designs. Electrical parameters match the obsolete CLL4715 BK TIN/LEAD. Package compatibility with board design must be confirmed.

Q: What compliance differences exist between these parts?

A: The CLL4715 BK TIN/LEAD is RoHS non-compliant. The CMHZ4715 BK TIN/LEAD has REACH Unaffected status. Applications subject to RoHS or REACH regulations must use the CMHZ4715 BK TIN/LEAD or identify compliant alternatives.

Q: Are both parts available from the same manufacturer?

A: Yes. Both the CLL4715 BK TIN/LEAD and CMHZ4715 BK TIN/LEAD are manufactured by Central Semiconductor Corp, ensuring consistent quality and performance standards.

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