CLL5234B TR Equivalent & Substitute Parts

Part Overview

The CLL5234B TR is a Zener diode rated at 6.2 V nominal with 500 mW power dissipation, manufactured by Central Semiconductor Corp in SOD-80 surface mount packaging. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The part operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is suitable for voltage regulation and protection applications in surface mount assemblies.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.2	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	7	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 4 V
Voltage - Forward (Vf) (Max) @ If	1.25	V @ 200 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CLL5234B TR is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Zener voltage nominal value: 6.2 V
Voltage tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 7 Ohms
Reverse leakage current: 5 µA @ 4 V
Package type: SOD-80 (DO-213AC, MINI-MELF)
Mounting configuration: Surface Mount

The substitute part TZM5234B-GS18 meets all critical electrical specifications and maintains identical package geometry, enabling direct functional replacement in circuit designs originally specified for the CLL5234B TR.

Parameter Comparison

Parameter	CLL5234B TR	TZM5234B-GS18	Match Status
Voltage - Zener (Nom)	6.2 V	6.2 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	7 Ohms	7 Ohms	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 4 V	5 µA @ 4 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	1.1 V @ 200 mA	Substitute Superior
Operating Temperature Range	-65 to 200°C	175°C (Max)	Substitute Limited
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

TZM5234B-GS18 (Vishay General Semiconductor - Diodes Division) is the qualified manufacturer-recommended substitute for the obsolete CLL5234B TR.

Selection Basis:

The TZM5234B-GS18 maintains full electrical equivalence across all critical zener diode parameters: nominal voltage, tolerance, power rating, impedance, and reverse leakage specifications. Both components utilize identical SOD-80 surface mount packaging, ensuring mechanical compatibility in existing PCB layouts without redesign.

The substitute part is currently in active production status with 23,400 units in stock, providing supply continuity for designs requiring the CLL5234B TR specification. The TZM5234B-GS18 carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

The forward voltage characteristic of the TZM5234B-GS18 (1.1 V @ 200 mA) is lower than the original part (1.25 V @ 200 mA), representing an operational improvement with reduced power dissipation during forward conduction. The maximum operating temperature of the substitute is specified at 175°C, which is within the upper range of the original part's -65°C to 200°C specification for most industrial applications.

Frequently Asked Questions (FAQ)

Q: Can TZM5234B-GS18 be used as a direct replacement for CLL5234B TR in existing designs?

A: Yes. The TZM5234B-GS18 meets all electrical specifications of the CLL5234B TR across zener voltage, tolerance, power dissipation, impedance, and reverse leakage parameters. Both components use identical SOD-80 surface mount packaging, enabling direct PCB substitution without layout modification.

Q: What is the difference in forward voltage between these parts?

A: The CLL5234B TR specifies maximum forward voltage of 1.25 V @ 200 mA, while the TZM5234B-GS18 specifies 1.1 V @ 200 mA. The lower forward voltage of the substitute results in reduced power dissipation during forward conduction operation.

Q: Are there temperature range differences between the parts?

A: The CLL5234B TR operates from -65°C to 200°C. The TZM5234B-GS18 specifies a maximum operating temperature of 175°C. For applications requiring operation above 175°C, the original specification must be verified against actual circuit thermal requirements.

Q: What packaging options are available for both parts?

A: Both the CLL5234B TR and TZM5234B-GS18 are supplied in SOD-80 surface mount packaging, also designated as DO-213AC or MINI-MELF. This standardized package ensures mechanical and electrical compatibility.

Q: What is the compliance status of the substitute part?

A: The TZM5234B-GS18 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: Why is the original CLL5234B TR classified as obsolete?

A: The CLL5234B TR is listed as obsolete by the original manufacturer. The TZM5234B-GS18 is the active production equivalent, ensuring continued availability and supply chain stability for designs requiring 6.2 V, 500 mW zener diode functionality in SOD-80 packaging.

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