CLL4704 BK TIN/LEAD Equivalent & Substitute Parts

Part Overview

The CLL4704 BK TIN/LEAD is a surface mount Zener diode rated at 17 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 across voltage regulation, power handling, and thermal operating ranges while accommodating alternative package formats where applicable.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	17	V
Tolerance	±5	%
Power - Max	500	mW
Current - Reverse Leakage @ Vr	50 nA @ 12.9 V	nA
Voltage - Forward (Vf) (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	—
RoHS Status	Non-compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the CLL4704 BK TIN/LEAD are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Electrical Parameters (Must Match):

Voltage - Zener (Nom): 17 V
Tolerance: ±5%
Power - Max: 500 mW
Current - Reverse Leakage @ Vr: 50 nA @ 12.9 V
Voltage - Forward (Vf) (Max) @ If: 1.5 V @ 100 mA

Mechanical Parameters (Must Match):

Mounting Type: Surface Mount
Package / Case compatibility with SOD-80 or equivalent surface mount formats

Product Status Consideration: Substitute parts with active product status provide superior long-term availability and supply chain stability compared to obsolete components.

Thermal Operating Range: The operating temperature range may vary between substitute parts. Applications requiring the full -65°C to 200°C range must verify substitute part thermal specifications.

Parameter Comparison

Parameter	CLL4704 BK TIN/LEAD	CMHZ4704 BK TIN/LEAD	Match Status
Voltage - Zener (Nom)	17 V	17 V	Match
Tolerance	±5%	±5%	Match
Power - Max	500 mW	500 mW	Match
Current - Reverse Leakage @ Vr	50 nA @ 12.9 V	50 nA @ 12.9 V	Match
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	1.5 V @ 100 mA	Match
Mounting Type	Surface Mount	Surface Mount	Match
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different Format
Operating Temperature Range	-65°C ~ 200°C (TJ)	-65°C ~ 150°C (TJ)	Partial Match
Product Status	Obsolete	Active	Substitute Advantage

Engineering Selection Recommendations

CMHZ4704 BK TIN/LEAD as Primary Substitute:

The CMHZ4704 BK TIN/LEAD manufactured by Central Semiconductor Corp is a direct electrical equivalent to the CLL4704 BK TIN/LEAD. All critical electrical parameters—zener voltage, tolerance, power rating, reverse leakage current, and forward voltage—are identical. Both components are surface mount Zener diodes with matching electrical performance specifications.

Package Format Consideration:

The CMHZ4704 BK TIN/LEAD uses SOD-123 packaging, whereas the original CLL4704 BK TIN/LEAD uses SOD-80 (DO-213AC, MINI-MELF) packaging. SOD-123 and SOD-80 are distinct surface mount packages with different footprints and pin configurations. PCB layout modifications are required when substituting between these package formats.

Thermal Operating Range:

The CMHZ4704 BK TIN/LEAD operates across -65°C to 150°C (TJ), compared to the CLL4704 BK TIN/LEAD range of -65°C to 200°C (TJ). Applications requiring operation above 150°C junction temperature must verify thermal compatibility with the substitute part.

Product Status and Availability:

The CMHZ4704 BK TIN/LEAD carries active product status, ensuring ongoing manufacturing support and supply chain availability. The original CLL4704 BK TIN/LEAD is obsolete, making the CMHZ4704 BK TIN/LEAD the recommended long-term solution for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the CMHZ4704 BK TIN/LEAD be used as a direct drop-in replacement for the CLL4704 BK TIN/LEAD?

A: The CMHZ4704 BK TIN/LEAD is electrically equivalent but not a direct drop-in replacement due to package format differences. The CLL4704 uses SOD-80 packaging while the CMHZ4704 uses SOD-123 packaging. PCB layout and footprint modifications are required.

Q: Are the electrical specifications identical between these two parts?

A: Yes. Both the CLL4704 BK TIN/LEAD and CMHZ4704 BK TIN/LEAD share identical electrical specifications: 17 V nominal zener voltage, ±5% tolerance, 500 mW maximum power, 50 nA reverse leakage current at 12.9 V, and 1.5 V maximum forward voltage at 100 mA.

Q: What is the difference in operating temperature range?

A: The CLL4704 BK TIN/LEAD operates from -65°C to 200°C junction temperature, while the CMHZ4704 BK TIN/LEAD operates from -65°C to 150°C junction temperature. Applications requiring operation above 150°C must use the original CLL4704 or identify alternative parts with extended thermal ratings.

Q: Why is the CLL4704 BK TIN/LEAD listed as obsolete?

A: The CLL4704 BK TIN/LEAD is classified as obsolete by the manufacturer, indicating discontinued production. The CMHZ4704 BK TIN/LEAD with active product status is the recommended alternative for ongoing supply and future designs.

Q: What are the package dimensions and pin configurations for each part?

A: The CLL4704 BK TIN/LEAD uses DO-213AC (MINI-MELF, SOD-80) packaging. The CMHZ4704 BK TIN/LEAD uses SOD-123 packaging. Specific dimensional data and pin configurations must be obtained from the respective manufacturer datasheets.

Q: Can both parts be used interchangeably in the same circuit?

A: Both parts are electrically equivalent and can function in the same circuit application. However, physical substitution requires PCB redesign due to different package formats. Thermal operating range differences must be evaluated for specific applications.

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