TPSMA9.1HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA9.1HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is designed for transient overvoltage protection in automotive and industrial applications, featuring a 7.37V reverse standoff voltage and 13.8V maximum clamping voltage. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

TPSMA9.1HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 815TPSMA9.1HE3_A/I Datasheet

Current PartRFQ

TPSMA9.1AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1001TPSMA9.1AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMA9.1HE3_A/I is determined by the following critical parameters:

Mandatory Matching Criteria:

• Unidirectional channel configuration (1 channel required)
• Package type: DO-214AC (SMA) surface mount
• Automotive grade classification
• AEC-Q101 qualification
• Operating temperature range: -65°C ~ 185°C (TJ)
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Allowable Parameter Variance:

• Voltage - Reverse Standoff (Typ): ±0.41V tolerance
• Voltage - Breakdown (Min): ±0.46V tolerance
• Voltage - Clamping (Max) @ Ipp: ±0.8V tolerance
• Current - Peak Pulse (10/1000µs): ±0.9A tolerance
• Power - Peak Pulse: Equal or greater capacity

The TPSMA9.1AHE3_B/I qualifies as a direct substitute based on these criteria, with minor variations in electrical characteristics within acceptable engineering tolerances for the PAR® series.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA9.1AHE3_B/I is the designated substitute for the obsolete TPSMA9.1HE3_A/I. Both components share identical automotive grade classification and AEC-Q101 qualification, ensuring compliance with automotive reliability standards. The substitute maintains the same operating temperature range (-65°C ~ 185°C) and RoHS3 compliance status.

The primary advantage of the TPSMA9.1AHE3_B/I is its active product status, providing long-term availability and supply chain continuity. The electrical parameter variations fall within acceptable tolerances for the PAR® series: the reverse standoff voltage increases by 0.41V, breakdown voltage increases by 0.46V, clamping voltage decreases by 0.8V, and peak pulse current increases by 0.9A. These variations maintain functional equivalence for transient overvoltage protection applications.

Frequently Asked Questions (FAQ)

Q: Can the TPSMA9.1AHE3_B/I be used as a direct replacement for the TPSMA9.1HE3_A/I?

A: Yes. Both components are unidirectional TVS diodes in the DO-214AC (SMA) package with identical automotive grade and AEC-Q101 qualification. The electrical parameter variations are within acceptable engineering tolerances for the PAR® series.

Q: What are the key differences between these two parts?

A: The TPSMA9.1AHE3_B/I has a higher reverse standoff voltage (7.78V vs. 7.37V), higher breakdown voltage (8.65V vs. 8.19V), slightly lower clamping voltage (13V vs. 13.8V), and marginally higher peak pulse current (29.9A vs. 29A). The substitute is currently in active production status, whereas the original part is obsolete.

Q: Are the packaging and mounting specifications identical?

A: Yes. Both parts use the DO-214AC (SMA) surface mount package. The TPSMA9.1AHE3_B/I is supplied in Tape & Reel (TR) format, which is standard for production environments.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the TPSMA9.1HE3_A/I and TPSMA9.1AHE3_B/I are automotive grade components with AEC-Q101 qualification, RoHS3 compliance, and MSL rating of 1 (Unlimited).

Q: What is the operating temperature range for both parts?

A: Both components operate across the identical temperature range of -65°C to 185°C (junction temperature), suitable for automotive and industrial applications.