TPSMC9.1HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMC9.1HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for surface mount applications in the DO-214AB (SMC) package and provides transient overvoltage protection with a 13.8V clamping voltage and 109A peak pulse current capability. The part is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

TPSMC9.1HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 927TPSMC9.1HE3_A/I Datasheet

Current PartRFQ

TPSMC9.1AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 830TPSMC9.1AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPSMC9.1HE3_A/I is determined by the following critical parameters:

• Identical package type: DO-214AB (SMC) surface mount configuration
• Matching unidirectional channel configuration: 1 channel
• Automotive grade classification with AEC-Q101 qualification
• Operating temperature range: -65°C to 185°C (TJ)
• Clamping voltage tolerance within application requirements
• Peak pulse current capability sufficient for circuit protection
• RoHS3 compliance and MSL 1 rating

The substitute part TPSMC9.1AHE3_B/I meets all these criteria while maintaining functional compatibility for transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

The TPSMC9.1AHE3_B/I is the direct substitute for the obsolete TPSMC9.1HE3_A/I. Both components share identical automotive qualification (AEC-Q101), RoHS3 compliance, and MSL 1 rating, ensuring compatibility in regulated applications. The substitute part maintains the same package footprint (DO-214AB/SMC) and thermal operating range (-65°C to 185°C TJ).

The TPSMC9.1AHE3_B/I is currently in Active product status with confirmed inventory availability, making it the appropriate choice for new designs and ongoing production support where the original part is no longer available.

Frequently Asked Questions (FAQ)

Q: Can TPSMC9.1AHE3_B/I be used as a direct replacement for TPSMC9.1HE3_A/I?

A: Yes. Both parts are unidirectional TVS diodes in the DO-214AB (SMC) package with identical automotive grade and AEC-Q101 qualification. The electrical parameters are within compatible ranges for transient voltage suppression applications.

Q: What are the key differences between these parts?

A: The substitute part exhibits a slightly higher reverse standoff voltage (7.78V vs. 7.37V) and lower clamping voltage (13.4V vs. 13.8V), with marginally higher peak pulse current (112A vs. 109A). Peak pulse power remains identical at 1500W. These variations fall within normal manufacturing tolerances for the PAR® series.

Q: Are the package dimensions identical?

A: Yes. Both parts use the DO-214AB (SMC) surface mount package, ensuring identical PCB footprint and reflow soldering compatibility.

Q: Does the substitute part meet automotive requirements?

A: Yes. TPSMC9.1AHE3_B/I carries Automotive grade classification and AEC-Q101 qualification, matching the original part's compliance profile.

Q: What is the difference in product status?

A: The original part (TPSMC9.1HE3_A/I) is Obsolete, while the substitute (TPSMC9.1AHE3_B/I) is Active. This makes the substitute the recommended choice for procurement and design continuity.