CLL4705 BK TIN/LEAD Equivalent & Substitute Parts

Part Overview

The CLL4705 BK TIN/LEAD is a surface mount Zener diode rated at 18 V nominal with 500 mW maximum power dissipation and ±5% tolerance. Manufactured by Central Semiconductor Corp, this component is packaged in DO-213AC (MINI-MELF, SOD-80) format. The part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical performance specifications while accommodating available packaging and product status constraints.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	18	V
Tolerance	±5	%
Power - Max	500	mW
Current - Reverse Leakage @ Vr	50 nA @ 13.6 V	nA
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	V
Operating Temperature Range	-65°C to 200°C	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—

Substitute Part Grouping Explanation

Substitution of the CLL4705 BK TIN/LEAD is determined by strict equivalence of the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Voltage - Zener (Nom): 18 V
Tolerance: ±5%
Power - Max: 500 mW
Current - Reverse Leakage @ Vr: 50 nA @ 13.6 V
Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 100 mA

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package / Case compatibility with circuit board layout and assembly equipment

The CMHZ4705 BK TIN/LEAD meets all electrical specifications and maintains surface mount compatibility. Package differences (SOD-123 versus SOD-80) require physical layout verification but do not affect electrical performance within the specified parameters.

Parameter Comparison

Parameter	CLL4705 BK TIN/LEAD	CMHZ4705 BK TIN/LEAD	Match
Voltage - Zener (Nom)	18 V	18 V	Yes
Tolerance	±5%	±5%	Yes
Power - Max	500 mW	500 mW	Yes
Current - Reverse Leakage @ Vr	50 nA @ 13.6 V	50 nA @ 13.6 V	Yes
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	1.5 V @ 100 mA	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different
Operating Temperature Range	-65°C to 200°C	-65°C to 150°C	Partial
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

CMHZ4705 BK TIN/LEAD is the qualified substitute for CLL4705 BK TIN/LEAD based on the following factors:

Electrical Equivalence: All critical electrical parameters match exactly, including Zener voltage, tolerance, power rating, reverse leakage current, and forward voltage characteristics.
Product Status: The CMHZ4705 is classified as Active, providing long-term availability and supply chain continuity compared to the obsolete CLL4705.
Compliance: Both parts carry EAR99 ECCN classification and HTSUS code 8541.10.0050. The CMHZ4705 is REACH Unaffected, confirming regulatory compliance.
Package Consideration: The CMHZ4705 uses SOD-123 packaging instead of SOD-80. This difference requires physical layout verification to confirm footprint compatibility with existing printed circuit board designs and assembly equipment capabilities.
Operating Temperature: The CMHZ4705 operating range (-65°C to 150°C) is narrower than the CLL4705 (-65°C to 200°C). Applications requiring operation above 150°C must retain the original CLL4705 specification or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can CMHZ4705 BK TIN/LEAD be used as a direct replacement for CLL4705 BK TIN/LEAD?

A: Electrical substitution is valid. The CMHZ4705 matches all electrical specifications. Physical substitution requires confirmation that SOD-123 package dimensions are compatible with the circuit board layout and assembly process.

Q: What is the primary difference between these two parts?

A: The main differences are package format (SOD-80 versus SOD-123) and operating temperature upper limit (200°C versus 150°C). Electrical performance is identical.

Q: Why is the CLL4705 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CMHZ4705 provides equivalent electrical function with active product status and ongoing availability.

Q: Are there any compliance or certification differences?

A: Both parts share the same ECCN and HTSUS classifications. The CMHZ4705 is REACH Unaffected, confirming regulatory compliance for current applications.

Q: What should be verified before implementing the CMHZ4705 substitute?

A: Verify SOD-123 package footprint compatibility with existing PCB layout. Confirm that the maximum operating temperature of 150°C meets application requirements. Validate assembly equipment capability for SOD-123 placement and soldering.

Q: Is the ±5% tolerance maintained in the substitute part?

A: Yes. The CMHZ4705 maintains ±5% Zener voltage tolerance, matching the CLL4705 specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message