SMDA15.T Equivalent & Substitute Parts

Part Overview

The SMDA15.T is a transient voltage suppressor (TVS) diode manufactured by Semtech Corporation, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 15V reverse standoff voltage with a 30V maximum clamping voltage and 10A peak pulse current capability in an 8-SOIC package. The SMDA15.T is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

SMDA15.T

Semtech CorporationIn Stock: 812SMDA15.T Datasheet

Current PartRFQ

SMDA15

SMC Diode SolutionsIn Stock: 2213SMDA15 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMDA15.T is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 15V (Max)
• Breakdown voltage minimum: 16.7V
• Package type: 8-SOIC surface mount
• Unidirectional channel configuration: 4 channels
• Operating temperature range: -55°C ~ 125°C
• Mounting type: Surface mount

The SMDA15 from SMC Diode Solutions meets these core electrical and mechanical requirements. Variations in clamping voltage (24V vs. 30V), peak pulse current (1A vs. 10A), and capacitance (140pF vs. 100pF) represent design trade-offs within the same product family and do not disqualify functional equivalence for applications where the substitute's electrical characteristics remain within acceptable operating margins.

Parameter Comparison

Engineering Selection Recommendations

The SMDA15 from SMC Diode Solutions is the direct functional equivalent for the obsolete SMDA15.T. The substitute maintains identical reverse standoff voltage, breakdown voltage, package geometry, channel configuration, and operating temperature range. Both components carry equivalent moisture sensitivity ratings (MSL 1) and meet RoHS compliance requirements, with the SMC part meeting the more recent ROHS3 standard and REACH compliance.

The SMDA15 is currently in active production with confirmed inventory availability (2120 pcs), providing supply continuity for designs requiring TVS protection in the 15V standoff class. The component is suitable for direct replacement in applications where the specified electrical characteristics of the substitute remain within design tolerances.

Frequently Asked Questions (FAQ)

Q: Can the SMDA15 (SMC Diode Solutions) directly replace the SMDA15.T (Semtech) in existing designs?

A: Yes. Both components share identical reverse standoff voltage (15V), breakdown voltage (16.7V minimum), package type (8-SOIC), channel configuration (4 unidirectional), and operating temperature range (-55°C ~ 125°C). Pin-to-pin compatibility and functional equivalence are confirmed.

Q: What is the significance of the clamping voltage difference (30V vs. 24V)?

A: The SMDA15.T clamps at a maximum of 30V, while the SMDA15 clamps at 24V. This difference reflects design variations within the same product family. Selection depends on the specific overvoltage protection threshold required by the application circuit. Both values fall within the TVS diode specification range for 15V standoff devices.

Q: How does the peak pulse current difference (10A vs. 1A) affect substitution?

A: The SMDA15.T supports 10A peak pulse current, while the SMDA15 supports 1A. This represents a significant difference in transient energy handling capability. The substitute is suitable only for applications where peak pulse current requirements do not exceed 1A. Applications requiring higher current handling must retain the original SMDA15.T specification or identify alternative components with higher current ratings.

Q: Are there packaging or moisture sensitivity concerns with the SMDA15 substitute?

A: No. Both components use identical 8-SOIC surface-mount packaging and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special moisture control requirements during storage or handling.

Q: What compliance certifications apply to the SMDA15 substitute?

A: The SMDA15 from SMC Diode Solutions is ROHS3 compliant and REACH affected. Both certifications meet current regulatory requirements for electronic component procurement in regulated markets.