CLL4717 BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL4717 BK is a 43 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in the SOD-80 (DO-213AC, MINI-MELF) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part operates across a temperature range of -65°C to 200°C and maintains ±5% voltage tolerance with specified reverse leakage characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	43	V
Power - Max	500	mW
Tolerance	±5%	%
Current - Reverse Leakage @ Vr	10 nA @ 32.6 V	nA
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 100 mA	V
Mounting Type	Surface Mount
Operating Temperature Range	-65°C to 200°C	°C

Substitute Part Grouping Explanation

Substitution of the CLL4717 BK is determined by electrical parameter equivalence and mechanical compatibility. The primary substitute, CMHZ4717 BK, maintains identical electrical specifications: 43 V nominal Zener voltage, 500 mW maximum power dissipation, ±5% tolerance, 10 nA reverse leakage at 32.6 V, and 1.5 V maximum forward voltage at 100 mA. Both parts are surface mount devices manufactured by Central Semiconductor Corp.

The critical substitution criteria are:

Zener voltage rating: 43 V nominal
Power rating: 500 mW maximum
Voltage tolerance: ±5%
Reverse leakage specification: 10 nA @ 32.6 V
Forward voltage characteristic: 1.5 V @ 100 mA
Surface mount configuration

Package differences between SOD-80 and SOD-123 represent the primary mechanical distinction. The CMHZ4717 BK operates across -65°C to 150°C, which is a narrower temperature range than the original CLL4717 BK (-65°C to 200°C). The CMHZ4717 BK maintains active product status with current manufacturing availability.

Parameter Comparison

Parameter	CLL4717 BK	CMHZ4717 BK	Match
Manufacturer	Central Semiconductor Corp	Central Semiconductor Corp	Yes
Category	Diodes, Zener	Diodes, Zener	Yes
Voltage - Zener (Nom)	43 V	43 V	Yes
Tolerance	±5%	±5%	Yes
Power - Max	500 mW	500 mW	Yes
Current - Reverse Leakage @ Vr	10 nA @ 32.6 V	10 nA @ 32.6 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	No
Operating Temperature Range	-65°C to 200°C	-65°C to 150°C	Partial
Product Status	Obsolete	Active	N/A

Engineering Selection Recommendations

The CMHZ4717 BK serves as the direct electrical equivalent to the obsolete CLL4717 BK, with all core electrical parameters matching specification. The substitute part is manufactured by the same supplier and maintains active product status, ensuring continued availability for production and design applications.

Selection of CMHZ4717 BK requires accommodation of two design considerations:

Package transition from SOD-80 to SOD-123 necessitates PCB layout modification and potential footprint redesign.
Operating temperature range reduction from 200°C to 150°C maximum junction temperature requires thermal analysis confirmation for applications operating above 150°C.

Applications operating within the -65°C to 150°C temperature envelope and compatible with SOD-123 package geometry proceed directly to CMHZ4717 BK substitution. Applications requiring operation above 150°C junction temperature require alternative component evaluation outside the provided substitute list.

Frequently Asked Questions (FAQ)

Q: Can CMHZ4717 BK replace CLL4717 BK in all applications?

A: Electrical substitution is valid for all applications within the -65°C to 150°C operating temperature range. Applications requiring junction temperatures above 150°C require alternative components. PCB layout modification is necessary due to package change from SOD-80 to SOD-123.

Q: What is the primary difference between CLL4717 BK and CMHZ4717 BK?

A: The parts are electrically identical across all specified parameters. The primary differences are package type (SOD-80 versus SOD-123) and maximum operating temperature (200°C versus 150°C). CMHZ4717 BK maintains active product status while CLL4717 BK is obsolete.

Q: Are there package compatibility considerations for SOD-80 to SOD-123 transition?

A: Yes. SOD-80 and SOD-123 are distinct surface mount packages with different footprint geometries. PCB redesign is required for component placement and trace routing. Consult package datasheets for specific dimensional requirements.

Q: What electrical parameters must match for Zener diode substitution?

A: Zener voltage rating, power dissipation rating, voltage tolerance, reverse leakage current, and forward voltage characteristics must match or exceed original specifications. The CMHZ4717 BK matches all electrical parameters of CLL4717 BK.

Q: Is the CMHZ4717 BK suitable for high-temperature applications?

A: The CMHZ4717 BK operates to 150°C maximum junction temperature. Applications requiring sustained operation above 150°C require alternative component selection. Thermal analysis of the specific application determines actual junction temperature under operating conditions.

Q: What compliance certifications apply to CMHZ4717 BK?

A: CMHZ4717 BK carries REACH Unaffected status and EAR99 ECCN classification, matching the regulatory framework of the original CLL4717 BK.

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