CLL5263B BK Zener Diode Equivalent & Substitute Parts

Part Overview

The CLL5263B BK is a 56 V, 500 mW Zener diode manufactured by Central Semiconductor Corp in SOD-80 (DO-213AC, MINI-MELF) surface mount package. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential 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 requiring precise 56 V reference levels.

Substiute Parts

CLL5263B BK

Central Semiconductor CorpIn Stock: 977CLL5263B BK Datasheet

Current PartRFQ

TZMC56-GS08

Vishay General Semiconductor - Diodes DivisionIn Stock: 135186TZMC56-GS08 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL5263B BK is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Zener voltage: 56 V nominal
• Power dissipation: 500 mW maximum
• Voltage tolerance: ±5%
• Package type: SOD-80 (DO-213AC, MINI-MELF) surface mount
• Reverse leakage current: 100 nA @ 43 V
• Mounting configuration: Surface mount

Acceptable Variation Parameters:

• Impedance (Zzt): Maximum 150 Ohms (lower values acceptable)
• Forward voltage (Vf): Maximum 1.25 V @ 200 mA (lower values acceptable)
• Operating temperature range: Minimum -65°C to 200°C (extended ranges acceptable)

The TZMC56-GS08 from Vishay General Semiconductor - Diodes Division meets all critical matching parameters and represents a direct functional equivalent for the obsolete CLL5263B BK.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TZMC56-GS08

The TZMC56-GS08 is the manufacturer-recommended substitute for the obsolete CLL5263B BK. This part maintains electrical equivalence across all critical parameters and offers the following advantages:

• Active Product Status: The TZMC56-GS08 is in active production, ensuring long-term availability and supply chain stability.
• Automotive Grade Qualification: The part carries AEC-Q101 qualification and automotive-grade designation, indicating compliance with automotive reliability standards.
• RoHS3 Compliance: The TZMC56-GS08 is RoHS3 compliant, meeting current environmental and regulatory requirements.
• REACH Unaffected Status: The part is REACH unaffected, confirming compliance with chemical substance regulations.
• Impedance Improvement: The lower maximum impedance (135 Ohms vs. 150 Ohms) provides improved dynamic performance characteristics.
• High Inventory Availability: 135,150 pieces in stock ensure immediate procurement without lead time constraints.

Application Considerations:

The TZMC56-GS08 is suitable for direct replacement in applications where the CLL5263B BK was originally specified. The reduced maximum operating temperature (175°C vs. 200°C) is acceptable for standard industrial and automotive applications operating within normal thermal limits. The slightly higher forward voltage (1.5 V vs. 1.25 V @ 200 mA) has negligible impact on circuit performance in typical voltage regulation and protection circuits.

Frequently Asked Questions (FAQ)

Q: Can the TZMC56-GS08 be used as a direct pin-for-pin replacement for the CLL5263B BK?

A: Yes. Both parts use identical SOD-80 (DO-213AC, MINI-MELF) surface mount packaging with the same lead configuration and footprint. No PCB modifications are required.

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

A: The TZMC56-GS08 has lower maximum impedance, which represents improved dynamic response characteristics. This is a beneficial parameter variation that does not compromise compatibility. Lower impedance results in better voltage regulation performance under transient conditions.

Q: Does the reduced operating temperature range (-65°C to 175°C vs. -65°C to 200°C) affect compatibility?

A: For standard industrial and automotive applications, the 175°C maximum junction temperature of the TZMC56-GS08 is sufficient. Applications requiring operation above 175°C junction temperature would require alternative component selection. Verify your application's maximum junction temperature requirement before substitution.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive electronics council qualification standard for discrete semiconductors. It certifies that the component meets automotive industry reliability, quality, and performance standards. This qualification enhances component reliability for automotive and high-reliability applications.

Q: Is the TZMC56-GS08 available in the same packaging options as the CLL5263B BK?

A: Yes. The TZMC56-GS08 is supplied in SOD-80 MiniMELF packaging in Tape & Reel (TR) format. The physical package dimensions and lead configuration are identical to the original CLL5263B BK, ensuring mechanical compatibility.

Q: What is the difference between RoHS3 compliance and REACH unaffected status?

A: RoHS3 compliance indicates the part meets the Restriction of Hazardous Substances directive, limiting use of specific hazardous materials. REACH unaffected status means the part is not subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) chemical substance restrictions. Both certifications confirm environmental and regulatory compliance.

Q: Can the TZMC56-GS08 be used in high-temperature applications exceeding 175°C?

A: No. The TZMC56-GS08 is rated for maximum junction temperature of 175°C. Applications requiring operation above this temperature require alternative component selection with higher temperature ratings.