CMLSH-4 BK Equivalent & Substitute Parts

Part Overview

The CMLSH-4 BK is a Schottky diode array manufactured by Central Semiconductor Corp, featuring 2 independent diodes rated for 40 V DC reverse voltage and 200 mA average rectified current per diode in a surface mount SOT-563/SOT-666 package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part is suitable for applications requiring small signal rectification with fast switching characteristics and low forward voltage drop typical of Schottky technology.

Substiute Parts

CMLSH-4 BK

Central Semiconductor CorpIn Stock: 917CMLSH-4 BK Datasheet

Current PartRFQ

BAT40V-7

Diodes IncorporatedIn Stock: 227510BAT40V-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CMLSH-4 BK is determined by strict equivalence across the following critical parameters:

• Diode Configuration: Must be 2 Independent diodes
• Technology: Must be Schottky
• Voltage - DC Reverse (Vr) (Max): Must be 40 V
• Current - Average Rectified (Io) (per Diode): Must be 200 mA (DC)
• Package / Case: Must be SOT-563 or SOT-666
• Mounting Type: Must be Surface Mount
• Reverse Recovery Time (trr): Must be 5 ns

The BAT40V-7 manufactured by Diodes Incorporated meets all these criteria and is classified as an active product, making it a direct functional equivalent for the obsolete CMLSH-4 BK.

Parameter Comparison

Engineering Selection Recommendations

The BAT40V-7 is the direct equivalent substitute for the obsolete CMLSH-4 BK. Both components share identical electrical specifications for reverse voltage, rectified current, reverse recovery time, and reverse leakage current. The BAT40V-7 is manufactured by Diodes Incorporated and maintains active product status with full availability.

Key considerations for selection:

• Product Status: The BAT40V-7 is active and widely available (227,400 pcs in stock), whereas the CMLSH-4 BK is obsolete with limited remaining inventory (821 pcs).
• Compliance: The BAT40V-7 carries ROHS3 compliance and REACH unaffected status, supporting modern regulatory requirements.
• Operating Temperature Range: The CMLSH-4 BK supports -65°C to 150°C, while the BAT40V-7 supports -65°C to 125°C. Applications requiring operation above 125°C must evaluate this difference.
• Forward Voltage Specification: The CMLSH-4 BK specifies 330 mV @ 2 mA, while the BAT40V-7 specifies 1 V @ 200 mA. These measurements are taken at different current levels and do not indicate incompatibility.
• Packaging: Both components are supplied in SOT-563 surface mount packages, ensuring mechanical and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can BAT40V-7 directly replace CMLSH-4 BK in existing designs?

A: Yes. The BAT40V-7 is a direct functional equivalent. Both components feature identical diode configuration (2 independent), technology (Schottky), reverse voltage rating (40 V), rectified current rating (200 mA per diode), reverse recovery time (5 ns), reverse leakage current (500 nA @ 25 V), and surface mount SOT-563 packaging. No circuit modifications are required.

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

A: The CMLSH-4 BK specifies maximum forward voltage of 330 mV at 2 mA, while the BAT40V-7 specifies maximum forward voltage of 1 V at 200 mA. These are measurements at different operating currents and represent typical Schottky diode behavior. At equivalent current levels, forward voltage characteristics are comparable. Circuit designs should reference the appropriate datasheet for the specific operating current of the application.

Q: Are there temperature range limitations when substituting?

A: The CMLSH-4 BK supports junction temperatures from -65°C to 150°C, while the BAT40V-7 supports -65°C to 125°C. Applications requiring sustained operation above 125°C must confirm that the BAT40V-7 meets thermal requirements. Most commercial and industrial applications operate within the BAT40V-7 temperature range.

Q: Is the BAT40V-7 available in the same package?

A: Yes. Both the CMLSH-4 BK and BAT40V-7 are supplied in SOT-563 surface mount packages. Mechanical compatibility is confirmed, and no PCB layout modifications are necessary.

Q: What compliance certifications does the BAT40V-7 carry?

A: The BAT40V-7 is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components in most jurisdictions.

Q: Why is the CMLSH-4 BK classified as obsolete?

A: The CMLSH-4 BK is no longer in active production. The BAT40V-7 from Diodes Incorporated serves as the active equivalent and is the recommended part for new designs and production continuity.