CMLSH-4 TR Equivalent & Substitute Parts

Part Overview

The CMLSH-4 TR 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 functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

CMLSH-4 TR

Central Semiconductor CorpIn Stock: 350332CMLSH-4 TR Datasheet

Current PartRFQ

BAT40V-7

Diodes IncorporatedIn Stock: 227510BAT40V-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Configuration Match: Both the main part and substitute must feature 2 independent Schottky diodes in a single package.

Electrical Ratings: Reverse voltage rating of 40 V, average rectified current of 200 mA per diode, and reverse recovery time of 5 ns must be maintained or exceeded.

Leakage Characteristics: Reverse leakage current of 500 nA @ 25 V establishes the baseline for leakage performance.

Package Compatibility: SOT-563 or SOT-666 surface mount packages ensure mechanical and thermal compatibility with existing PCB layouts.

Moisture Sensitivity: MSL 1 (Unlimited) classification permits unrestricted storage and handling conditions.

The BAT40V-7 from Diodes Incorporated meets all these criteria and is classified as an active product, providing long-term availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The BAT40V-7 is the designated substitute for the obsolete CMLSH-4 TR. Selection of this alternative is based on the following factors:

Product Status: The BAT40V-7 maintains active product status with Diodes Incorporated, ensuring continued availability, manufacturing support, and compliance with current industry standards.

Electrical Equivalence: All critical electrical parameters—reverse voltage, rectified current, leakage characteristics, and recovery time—are identical between the two devices.

Compliance Certifications: The BAT40V-7 carries RoHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements for electronic components.

Package Compatibility: Both devices utilize SOT-563/SOT-666 surface mount packages, permitting direct PCB layout compatibility without redesign.

Thermal Considerations: The BAT40V-7 operates across -65°C to 125°C, which covers the majority of industrial and commercial temperature ranges. Applications requiring the full -65°C to 150°C range of the CMLSH-4 TR must evaluate thermal performance within their specific operating envelope.

Frequently Asked Questions (FAQ)

Q: Can the BAT40V-7 be used as a direct replacement for the CMLSH-4 TR without PCB modifications?

A: Yes. Both devices are packaged in SOT-563/SOT-666 surface mount configurations with identical pin assignments for 2 independent Schottky diodes. No PCB layout changes are required.

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

A: The CMLSH-4 TR 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. Both devices meet the 40 V reverse voltage and 200 mA current ratings required for substitution.

Q: Does the BAT40V-7 have the same reverse leakage characteristics?

A: Yes. Both devices specify 500 nA @ 25 V reverse leakage current, ensuring equivalent performance in low-leakage applications.

Q: Is the operating temperature range difference significant?

A: The BAT40V-7 operates from -65°C to 125°C, compared to the CMLSH-4 TR range of -65°C to 150°C. Applications operating above 125°C must evaluate thermal performance. Most commercial and industrial applications operate within the BAT40V-7 temperature range.

Q: What is the reverse recovery time for both devices?

A: Both the CMLSH-4 TR and BAT40V-7 specify 5 ns reverse recovery time, making them equivalent for high-speed switching applications.

Q: Are there any compliance or regulatory differences?

A: The BAT40V-7 is RoHS3 compliant and REACH Unaffected, meeting current environmental and regulatory standards. The CMLSH-4 TR, being obsolete, may not carry current compliance certifications.

Q: What is the moisture sensitivity level for both parts?

A: Both devices carry MSL 1 (Unlimited) classification, permitting unrestricted storage and handling without moisture bake-out requirements.