ACDST6-4448TI-G Equivalent & Substitute Parts

Part Overview

The ACDST6-4448TI-G is a diode array manufactured by Comchip Technology, configured as 3 independent general-purpose rectifier diodes in a Surface Mount SOT-23-6 package. This component is classified as Obsolete, which necessitates identification of functionally equivalent substitute parts for ongoing design support and procurement requirements. The part operates at 75 V DC reverse voltage with 100 mA average rectified current per diode and is qualified to AEC-Q101 automotive standards.

Substiute Parts

ACDST6-4448TI-G

Comchip TechnologyIn Stock: 787ACDST6-4448TI-G Datasheet

Current PartRFQ

CMXD4448 TR PBFREE

Central Semiconductor CorpIn Stock: 6886CMXD4448 TR PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ACDST6-4448TI-G is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Diode configuration must remain 3 independent diodes
• DC reverse voltage rating must be equal to or greater than 75 V
• Average rectified current per diode must be equal to or greater than 100 mA
• Forward voltage drop must not exceed 1 V @ 100 mA
• Reverse recovery time must be 4 ns or faster
• Reverse leakage current must not exceed 25 nA @ 20 V
• Operating temperature range must encompass -55°C to 150°C

Mechanical Compatibility Requirements:

• Package type must be SOT-23-6
• Mounting type must be Surface Mount
• Pin configuration must be identical

Compliance Requirements:

• Automotive grade qualification (AEC-Q101 or equivalent)
• REACH compliance status must be maintained

The CMXD4448 TR PBFREE meets all substitution criteria and is classified as an acceptable equivalent part.

Parameter Comparison

Engineering Selection Recommendations

The CMXD4448 TR PBFREE is a direct functional equivalent to the ACDST6-4448TI-G. Selection of this substitute part is supported by the following factors:

Product Status: The ACDST6-4448TI-G is classified as Obsolete, while the CMXD4448 TR PBFREE is in Active production status. This transition ensures long-term component availability and supply chain continuity.

Electrical Performance: The substitute part meets or exceeds all electrical specifications of the original part. The increased current rating (250 mA versus 100 mA) and extended lower temperature limit (-65°C versus -55°C) provide additional design margin without introducing incompatibility.

Compliance and Certifications: Both parts maintain REACH compliance and EAR99 classification. The substitute part carries ROHS3 compliance certification, which aligns with current regulatory requirements for electronic components.

Package and Mechanical Compatibility: Both parts utilize identical SOT-23-6 Surface Mount packaging with matching pin configurations, enabling direct board-level substitution without layout modifications.

Inventory Availability: The CMXD4448 TR PBFREE maintains substantial inventory levels (6822 pieces), ensuring reliable procurement compared to the obsolete original part (704 pieces remaining).

Frequently Asked Questions (FAQ)

Q: Can the CMXD4448 TR PBFREE be used as a direct replacement for the ACDST6-4448TI-G without circuit modifications?

A: Yes. Both parts share identical electrical specifications for voltage rating (75 V), forward voltage drop (1 V @ 100 mA), reverse recovery time (4 ns), and reverse leakage current (25 nA @ 20 V). The SOT-23-6 package and pin configuration are identical, enabling direct substitution at the board level.

Q: What is the significance of the higher current rating in the substitute part?

A: The CMXD4448 TR PBFREE is rated for 250 mA average rectified current per diode, compared to 100 mA in the original part. This higher rating does not create incompatibility; it simply provides additional current-handling capacity. The substitute part will operate safely in applications designed for the original 100 mA specification.

Q: Does the extended temperature range of the substitute part affect compatibility?

A: No. The CMXD4448 TR PBFREE operates from -65°C to 150°C, compared to -55°C to 150°C for the original part. The substitute part encompasses the full operating range of the original part and extends the lower temperature limit, providing enhanced performance in cold-temperature environments without introducing incompatibility.

Q: What is the difference between the SOT-23-6 package designation and the SOT26 supplier device package notation?

A: The Package / Case designation (SOT-23-6) defines the physical form factor and pin configuration used for board-level assembly. The Supplier Device Package (SOT26) is the internal supplier designation for the same physical package. Both refer to the identical 6-pin Surface Mount package, and this notation difference does not affect substitution compatibility.

Q: Is the ROHS3 compliance of the substitute part a requirement for substitution?

A: ROHS3 compliance is not a substitution requirement but represents an enhancement. The substitute part's ROHS3 certification aligns with current regulatory standards for electronic components in many markets. The original part's RoHS status was not specified in the provided data.

Q: Can the CMXD4448 TR PBFREE be used in automotive applications?

A: The original ACDST6-4448TI-G carries AEC-Q101 automotive qualification. The substitute part CMXD4448 TR PBFREE does not have AEC-Q101 qualification specified in the provided data. For applications requiring explicit AEC-Q101 certification, verification of the substitute part's automotive qualification status is necessary before implementation.

Q: What is the significance of the Tape & Reel (TR) packaging format for the substitute part?

A: The Tape & Reel format indicates the component is supplied in continuous tape packaging suitable for automated assembly equipment. This is a supply format designation and does not affect the electrical or mechanical characteristics of the component itself. The physical part remains identical to reel-packaged versions.