CLL5230B TR Equivalent & Substitute Parts

Part Overview

The CLL5230B TR is a Zener diode rated at 4.7 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 non-RoHS compliant.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.7	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	19	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 2 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	-

Substitute Part Grouping Explanation

Substitution of the CLL5230B TR is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Zener voltage nominal rating: 4.7 V
Voltage tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 19 Ohms
Reverse leakage current: 5 µA @ 2 V
Package type: SOD-80 (DO-213AC, MINI-MELF)
Mounting configuration: Surface Mount

The substitute part TZM5230B-GS08 meets all electrical specifications and physical packaging requirements, enabling direct functional replacement in circuit applications where the CLL5230B TR was originally specified.

Parameter Comparison

Parameter	CLL5230B TR	TZM5230B-GS08	Match Status
Voltage - Zener (Nom)	4.7 V	4.7 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	19 Ohms	19 Ohms	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 2 V	5 µA @ 2 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	Up to 175°C	Substitute Limited
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Product Status	Obsolete	Active	Substitute Active
RoHS Status	Non-compliant	ROHS3 Compliant	Substitute Compliant

Engineering Selection Recommendations

The TZM5230B-GS08 manufactured by Vishay General Semiconductor - Diodes Division is the designated substitute for the obsolete CLL5230B TR. Selection of this alternative is supported by the following factors:

Product Status: The CLL5230B TR is classified as obsolete, while TZM5230B-GS08 maintains active production status, ensuring long-term availability and supply chain continuity.

Electrical Equivalence: All critical electrical parameters match specification requirements. The forward voltage characteristic of the substitute (1.1 V @ 200 mA) is superior to the original part (1.25 V @ 200 mA), resulting in lower power dissipation during forward conduction.

Compliance Status: TZM5230B-GS08 is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The original CLL5230B TR is non-RoHS compliant.

Packaging Compatibility: Both components utilize identical SOD-80 (DO-213AC, MINI-MELF) surface mount packaging, enabling direct PCB footprint compatibility without layout modification.

Temperature Consideration: The substitute part operates to 175°C maximum, which is lower than the original part's 200°C upper limit. Applications requiring operation above 175°C require thermal analysis to confirm suitability.

Frequently Asked Questions (FAQ)

Q: Can TZM5230B-GS08 be used as a direct replacement for CLL5230B TR without PCB modification?

A: Yes. Both components share identical SOD-80 surface mount packaging (DO-213AC, MINI-MELF). No PCB layout changes are required for physical substitution.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution is determined by matching Zener voltage (4.7 V nominal), voltage tolerance (±5%), maximum power rating (500 mW), impedance (19 Ohms maximum), reverse leakage current (5 µA @ 2 V), and package type (SOD-80). All parameters are equivalent between the two parts.

Q: Does the lower forward voltage of TZM5230B-GS08 affect circuit operation?

A: The substitute's forward voltage of 1.1 V @ 200 mA is lower than the original 1.25 V @ 200 mA specification. This results in reduced power dissipation during forward conduction and does not negatively impact circuit function. Circuits designed for the original specification will operate within acceptable parameters with the substitute.

Q: Is TZM5230B-GS08 suitable for applications requiring operation above 175°C?

A: The substitute part is rated to 175°C maximum, compared to the original part's 200°C upper limit. Applications requiring sustained operation above 175°C must be evaluated individually. Thermal analysis of the specific circuit application is necessary to determine if the reduced temperature rating presents a constraint.

Q: What compliance advantages does TZM5230B-GS08 provide?

A: TZM5230B-GS08 is ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components. The original CLL5230B TR is non-RoHS compliant. New designs and production runs should utilize the compliant substitute.

Q: Are there inventory considerations when transitioning from CLL5230B TR to TZM5230B-GS08?

A: TZM5230B-GS08 is actively produced with 16,910 pieces in stock, ensuring reliable supply availability. The original CLL5230B TR, though obsolete, has 5,300 pieces available. Transition planning should prioritize the active substitute for long-term production continuity.

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