CLL5263B TR Equivalent & Substitute Parts

Part Overview

The CLL5263B TR is a Zener diode rated at 56 V nominal voltage with 500 mW power dissipation, manufactured by Central Semiconductor Corp in SOD-80 surface mount packaging. This component is classified as obsolete, indicating discontinued production and limited availability. The part operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is non-compliant with RoHS standards.

Due to its obsolete status, identifying functionally equivalent active production alternatives is necessary for design continuity, supply chain reliability, and compliance with current regulatory requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	56	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	150	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 43 V	nA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	V
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 CLL5263B TR is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Zener voltage (Vz) must be 56 V nominal with ±5% tolerance
Maximum power dissipation must be 500 mW or greater
Reverse leakage current specification must be 100 nA @ 43 V or lower
Forward voltage drop must not exceed 1.25 V @ 200 mA

Mechanical & Package Equivalence Criteria:

Package type must be SOD-80 (DO-213AC, MINI-MELF)
Surface mount configuration required
Mounting footprint compatibility with SOD-80 standard

Operational Equivalence Criteria:

Operating temperature range must encompass or match -65°C to 200°C
Impedance specification must be 150 Ohms or lower

The TZMC56-GS08 from Vishay General Semiconductor meets all electrical and mechanical equivalence criteria and is classified as an active production part with current availability.

Parameter Comparison

Parameter	CLL5263B TR	TZMC56-GS08	Compatibility
Manufacturer	Central Semiconductor Corp	Vishay General Semiconductor - Diodes Division	Different manufacturer
Voltage - Zener (Nom)	56 V	56 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	150 Ohms	135 Ohms	Substitute superior
Current - Reverse Leakage @ Vr	100 nA @ 43 V	100 nA @ 43 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 200 mA	1.5 V @ 200 mA	Substitute slightly higher
Operating Temperature Range	-65°C to 200°C	-65°C to 175°C	Substitute narrower range
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	Equivalent
Product Status	Obsolete	Active	Substitute in production
RoHS Status	Non-compliant	ROHS3 Compliant	Substitute compliant

Engineering Selection Recommendations

The TZMC56-GS08 is the direct functional equivalent for the obsolete CLL5263B TR based on electrical and mechanical parameter alignment. Selection of this substitute is supported by the following factors:

Product Status: The TZMC56-GS08 is an active production component with substantial inventory availability (135,150 pcs), ensuring long-term supply continuity compared to the obsolete CLL5263B TR (755 pcs remaining stock).

Regulatory Compliance: The TZMC56-GS08 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The original CLL5263B TR is RoHS non-compliant.

Automotive Qualification: The TZMC56-GS08 carries AEC-Q101 automotive qualification and is designated as automotive grade, providing additional reliability assurance for applications requiring automotive-level component standards.

Electrical Performance: The substitute demonstrates equivalent or superior electrical characteristics. Impedance is 135 Ohms (lower than the 150 Ohms maximum of the original), indicating improved performance stability. Forward voltage is 1.5 V @ 200 mA compared to 1.25 V @ 200 mA in the original, representing a 0.25 V increase that remains within acceptable design margins for most applications.

Temperature Range Consideration: The TZMC56-GS08 operates to 175°C maximum, compared to 200°C for the original. Applications requiring operation above 175°C require design review.

Frequently Asked Questions (FAQ)

Q: Can the TZMC56-GS08 be used as a direct replacement for the CLL5263B TR without PCB modifications?

A: Yes. Both components use identical SOD-80 (DO-213AC, MINI-MELF) packaging with the same footprint and pin configuration. No PCB layout changes are required.

Q: What is the significance of the impedance difference (150 Ohms vs. 135 Ohms)?

A: Lower impedance in the TZMC56-GS08 indicates better voltage regulation stability and faster transient response. This represents an improvement over the original specification and does not create compatibility issues.

Q: Does the forward voltage increase from 1.25 V to 1.5 V affect circuit operation?

A: The 0.25 V increase is a minor parameter variance. For most voltage regulation and protection applications, this difference is negligible. Applications with tight forward voltage budgets require circuit analysis to confirm acceptability.

Q: Why is the operating temperature range narrower (175°C vs. 200°C)?

A: The TZMC56-GS08 is specified to 175°C maximum junction temperature. Applications operating above 175°C require alternative component selection or thermal management review.

Q: Is the TZMC56-GS08 suitable for automotive applications?

A: Yes. The TZMC56-GS08 carries AEC-Q101 qualification and automotive grade designation, making it suitable for automotive circuit applications.

Q: What inventory status should be considered when selecting between these parts?

A: The CLL5263B TR has 755 pcs remaining stock (obsolete status). The TZMC56-GS08 has 135,150 pcs in stock (active production). For new designs or long-term production, the TZMC56-GS08 is the appropriate selection.

Q: Are there any RoHS or environmental compliance differences?

A: Yes. The CLL5263B TR is RoHS non-compliant. The TZMC56-GS08 is ROHS3 compliant. For applications subject to RoHS requirements, only the TZMC56-GS08 is acceptable.

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