TPSMA22HE3_A/I Equivalent & Substitute Parts

Part Overview

The TPSMA22HE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AC (SMA) package. This component provides transient overvoltage protection with a reverse standoff voltage of 17.8V and peak pulse current handling of 12.5A. The part is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

TPSMA22HE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1148TPSMA22HE3_A/I Datasheet

Current PartRFQ

TPSMA22AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 754TPSMA22AHE3_B/I Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPSMA22HE3_A/I is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 17.8V nominal operating point
• Voltage - Breakdown (Min): 19.8V minimum trigger threshold
• Voltage - Clamping (Max) @ Ipp: 31.9V maximum clamping voltage
• Current - Peak Pulse (10/1000µs): 12.5A minimum pulse current capacity
• Power - Peak Pulse: 400W dissipation capability
• Package / Case: DO-214AC (SMA) form factor
• Operating Temperature: -65°C to 185°C junction temperature range
• Grade & Qualification: Automotive grade with AEC-Q101 certification

The substitute part TPSMA22AHE3_B/I maintains the same base product series (TPSMA22), identical package configuration, automotive qualification, and comparable electrical performance within acceptable tolerance ranges for TVS diode applications.

Parameter Comparison

Engineering Selection Recommendations

The TPSMA22AHE3_B/I is a direct functional substitute for the obsolete TPSMA22HE3_A/I. Both components share identical automotive qualification (AEC-Q101), operating temperature range, and package configuration. The substitute part is currently in Active product status with confirmed inventory availability, whereas the original part is Obsolete.

Electrical parameter variations between the two parts fall within acceptable tolerance ranges for TVS diode applications:

• Reverse standoff voltage increases by 1.0V (17.8V to 18.8V)
• Breakdown voltage increases by 1.1V (19.8V to 20.9V)
• Clamping voltage decreases by 1.3V (31.9V to 30.6V)
• Peak pulse current increases by 0.6A (12.5A to 13.1A)

These parameter shifts represent normal manufacturing variation within the TPSMA22 series and do not compromise circuit protection functionality. The substitute part provides equivalent or improved performance characteristics for transient overvoltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can TPSMA22AHE3_B/I be used as a direct replacement for TPSMA22HE3_A/I?

A: Yes. Both parts are unidirectional TVS diodes from the same PAR® series with identical DO-214AC (SMA) packaging, automotive grade classification, and AEC-Q101 qualification. Electrical parameters are within acceptable tolerance ranges for equivalent circuit protection performance.

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

A: The primary differences are product status (Obsolete vs. Active) and minor electrical parameter variations. The substitute part has a slightly higher reverse standoff voltage (18.8V vs. 17.8V), higher breakdown voltage (20.9V vs. 19.8V), lower clamping voltage (30.6V vs. 31.9V), and higher peak pulse current capacity (13.1A vs. 12.5A). These variations are within normal TVS diode tolerance ranges.

Q: Are there any packaging or mounting differences?

A: No. Both parts use the DO-214AC (SMA) surface mount package. The substitute part is supplied in Tape & Reel (TR) packaging format, which is standard for production quantities and does not affect electrical or mechanical compatibility.

Q: Is the substitute part automotive qualified?

A: Yes. TPSMA22AHE3_B/I carries Automotive grade classification and AEC-Q101 qualification, matching the original part's compliance requirements.

Q: What is the availability status of each part?

A: TPSMA22HE3_A/I is Obsolete with limited remaining inventory (1099 pcs). TPSMA22AHE3_B/I is Active with confirmed current inventory (692 pcs), making it the recommended choice for new designs and ongoing procurement.