CLL459A BK Equivalent & Substitute Parts

Part Overview

The CLL459A BK is a general-purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 200V DC reverse voltage and 200mA average rectified current in a surface mount SOD-80 package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The SOD-80 (DO-213AC, MINI-MELF) package format and electrical specifications define the substitution criteria for this diode category.

Substiute Parts

CLL459A BK

Central Semiconductor CorpIn Stock: 973CLL459A BK Datasheet

Current PartRFQ

CMHD459A BK

Central Semiconductor CorpIn Stock: 755CMHD459A BK Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLL459A BK is determined by electrical parameter equivalence and package compatibility. The primary substitution criteria are:

Electrical Parameters (Must Match or Exceed):

• Voltage - DC Reverse (Vr) (Max): 200V minimum
• Current - Average Rectified (Io): 200mA minimum
• Voltage - Forward (Vf) (Max) @ If: 1V @ 100mA maximum
• Current - Reverse Leakage @ Vr: 25nA @ 200V maximum
• Capacitance @ Vr, F: 6pF @ 0V, 1MHz maximum

Mechanical Parameters (Must Be Compatible):

• Mounting Type: Surface Mount
• Package / Case: SOD-80 or equivalent footprint-compatible package
• Operating Temperature Range: Must support -65°C to 200°C junction temperature minimum

Compliance Parameters:

• ECCN: EAR99
• HTSUS: 8541.10.0070

The CMHD459A BK qualifies as a substitute based on matching electrical specifications and surface mount technology, with the exception of package format (SOD-123 vs. SOD-80) and maximum junction temperature (150°C vs. 200°C).

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Product Status

The CLL459A BK is classified as obsolete. The CMHD459A BK is an active product from the same manufacturer with identical electrical specifications, making it the direct functional equivalent for new designs and ongoing procurement.

Package Compatibility Assessment

The CMHD459A BK uses SOD-123 packaging instead of the original SOD-80 format. Both are surface mount packages with different footprints. PCB layout modification is required if substituting in existing designs. The SOD-123 package is widely supported in modern manufacturing environments.

Temperature Range Consideration

The CMHD459A BK supports a maximum junction temperature of 150°C, compared to 200°C for the CLL459A BK. Applications requiring sustained operation above 150°C junction temperature cannot use this substitute without thermal design review.

Compliance and Regulatory Status

Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0070) classifications, ensuring equivalent export and tariff treatment. The CMHD459A BK carries REACH Unaffected status, confirming compliance with current environmental regulations.

Electrical Performance

All critical electrical parameters—reverse voltage, forward voltage, average rectified current, reverse leakage current, and capacitance—are identical between the main part and substitute. These specifications ensure functional equivalence in rectification applications.

Frequently Asked Questions (FAQ)

Q: Can the CMHD459A BK directly replace the CLL459A BK on existing PCBs?

A: Direct PCB replacement is not possible due to package format differences. The CLL459A BK uses SOD-80 (MINI-MELF) packaging, while the CMHD459A BK uses SOD-123 packaging. These packages have different footprints and land patterns. PCB redesign is required for substitution.

Q: Are the electrical specifications identical between these two parts?

A: Yes. Both parts have identical voltage ratings (200V), current ratings (200mA), forward voltage (1V @ 100mA), reverse leakage current (25nA @ 200V), and capacitance (6pF @ 0V, 1MHz). They are electrically equivalent for rectification applications.

Q: What is the significance of the temperature range difference?

A: The CLL459A BK supports junction temperatures up to 200°C, while the CMHD459A BK supports up to 150°C. For applications operating near or above 150°C junction temperature, the CMHD459A BK may not be suitable without thermal design modifications.

Q: Why is the CLL459A BK listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Central Semiconductor Corp. The CMHD459A BK, as an active product with equivalent electrical specifications, serves as the current production alternative.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts share identical ECCN (EAR99) and HTSUS (8541.10.0070) classifications. The CMHD459A BK carries REACH Unaffected status, confirming current environmental regulation compliance.

Q: What is the primary reason to substitute the CLL459A BK?

A: The primary reason is product availability. The CLL459A BK is obsolete and no longer in production. The CMHD459A BK is an active product from the same manufacturer with identical electrical performance, making it the appropriate choice for new designs and ongoing procurement.

Q: How do SOD-80 and SOD-123 packages differ physically?

A: SOD-80 (MINI-MELF) and SOD-123 are both surface mount packages but have different dimensions and footprints. SOD-123 is smaller and more compact. Component placement, land pattern, and solder reflow profiles may differ between packages.

Q: Can the CMHD459A BK be used in high-temperature applications?

A: The CMHD459A BK is rated for junction temperatures up to 150°C. Applications requiring sustained operation above this temperature require thermal analysis and may not be suitable for this substitute without design modifications.